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ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 ina19xa-q1 current shunt monitors ? 16-v to 80-v common-mode range 1 features 3 description the ina19xa-q1 family of current shunt monitors 1 ? qualified for automotive applications with voltage output can sense drops across shunts at ? wide common-mode voltage: common-mode voltages from ? 16 v to 80 v, ? 16 v to 80 v independent of the ina19xa supply voltage. they are ? low error: 3% overtemperature (maximum) available with three output voltage scales: 20 v/v, 50 v/v, and 100 v/v. the 500-khz bandwidth ? bandwidth: up to 500 khz simplifies use in current control loops and monitoring ? three transfer functions available: dc motor health. the ina193a ? ina195a provide 20 v/v, 50 v/v, and 100 v/v identical functions but alternative pin configurations to ? complete current-sense solution the ina196a ? ina198a, respectively. the ina19xa-q1 operate from a single 2.7-v to 18-v 2 applications supply. they are specified over the extended operating temperature range ( ? 40 c to 125 c), and ? welding equipment are offered in a space-saving sot-23 package. ? body control modules ? load health monitoring device information (1) ? telecom equipment part number package body size (nom) ? hev/ev powertrain ina19xa-q1 sot-23 (5) 2.90 mm 1.60 mm ? power management (1) for all available packages, see the orderable addendum at the end of the data sheet. ? battery chargers simplified schematic 1 an important notice at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. production data. v C16 v to +80 v in+ r s i s v+ 2.7 v to 18 v load a1 a2 r l negative and positive common-mode voltage 5 k 5 k out = i r r s s l 5 k ina193aCina198a v in+ v inC productfolder sample &buy technical documents tools & software support &community
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com table of contents 8.4 device functional modes ........................................ 16 1 features .................................................................. 1 9 application and implementation ........................ 20 2 applications ........................................................... 1 9.1 application information ............................................ 20 3 description ............................................................. 1 9.2 typical application ................................................. 20 4 revision history ..................................................... 2 10 power supply recommendations ..................... 21 5 pin configuration and functions ......................... 3 11 layout ................................................................... 22 6 specifications ......................................................... 4 11.1 layout guidelines ................................................. 22 6.1 absolute maximum ratings ...................................... 4 11.2 layout example .................................................... 22 6.2 esd ratings .............................................................. 4 12 device and documentation support ................. 23 6.3 recommended operating conditions ....................... 4 12.1 related links ........................................................ 23 6.4 thermal information .................................................. 4 12.2 community resources .......................................... 23 6.5 electrical characteristics ........................................... 5 12.3 trademarks ........................................................... 23 7 typical characteristics .......................................... 7 12.4 electrostatic discharge caution ............................ 23 8 detailed description ............................................ 11 12.5 glossary ................................................................ 23 8.1 overview ................................................................. 11 13 mechanical, packaging, and orderable 8.2 functional block diagram ....................................... 11 information ........................................................... 23 8.3 feature description ................................................. 11 4 revision history note: page numbers for previous revisions may differ from page numbers in the current version. changes from revision c (october 2008) to revision d page ? added esd ratings table, feature description section, device functional modes , application and implementation section, power supply recommendations section, layout section, device and documentation support section, and mechanical, packaging, and orderable information section ................................................................................................. 1 ? added input bias current vs common mode voltage graph to typical characteristics ......................................................... 7 ? added input bias current vs common mode voltage vs=12 v graph to typical characteristics ......................................... 7 2 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 5 pin configuration and functions dbv package dbv package 5-pin sot-23 5-pin sot-23 ina193a-q1, ina194a-q1, ina195a-q1 top view ina196a-q1, ina197a-q1, ina198a-q1 top view pin functions pin ina193a-q1, ina196a-q1, type description name ina194a-q1, ina197a-q1, ina195a-q1 ina198a-q1 gnd 2 2 gnd ground out 1 1 o output voltage v+ 5 3 analog power supply, 2.7 to 18 v v in+ 3 4 i connect to supply side of shunt resistor v in ? 4 5 i connect to load side of shunt resistor copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 3 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 out gnd v+ v in- v in+ 12 3 54 out gnd v in+ v+v in- 12 3 54
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com 6 specifications 6.1 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) (1) min max unit supply voltage 18 v differential input voltage range, analog inputs (v in+ ? v in ? ) ? 18 18 v common-mode voltage range (2) ? 16 80 v analog output voltage range (2) out gnd ? 0.3 (v+) + 0.3 v input current into any pin (2) 5 ma junction temperature 150 c storage temperature, t stg ? 65 150 c (1) stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions . exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) input voltage at any pin may exceed the voltage shown if the current at that pin is limited to 5 ma. 6.2 esd ratings value unit human-body model (hbm), per aec q100-002 (1) 4000 v (esd) electrostatic discharge charged-device model (cdm), per aec q100-011 1000 v machine model 200 (1) aec q100-002 indicates that hbm stressing shall be in accordance with the ansi/esda/jedec js-001 specification. 6.3 recommended operating conditions over operating free-air temperature range (unless otherwise noted) min nom max unit v cm common-mode input voltage 12 v v+ operating supply voltage 12 v t a operating free-air temperature -40 125 o c 6.4 thermal information ina19xa-q1 thermal metric (1) dbv (sot-23) unit 5 pins r ja junction-to-ambient thermal resistance 221.7 c/w r jc(top) junction-to-case (top) thermal resistance 144.7 c/w r jb junction-to-board thermal resistance 49.7 c/w jt junction-to-top characterization parameter 26.1 c/w jb junction-to-board characterization parameter 49 c/w (1) for more information about traditional and new thermal metrics, see the semiconductor and ic package thermal metrics application report, spra953 . 4 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 6.5 electrical characteristics v s = 12 v, v in+ = 12 v, v sense = 100 mv (unless otherwise noted) full range t a = ? 40 c to 125 c parameter test conditions t a min typ max unit input (v s ? 0.2)/ v sense full-scale input voltage v sense = v in+ ? v in ? 25 c 0.15 v gain vcm common-mode input full range ? 16 80 v v in+ = ? 16 v to 80 v 25 c 80 94 cmr common-mode rejection db v in+ = 12 v to 80 v full range 100 120 25 c 0.5 2 v os offset voltage, rti mv full range 0.5 3 dv os /dt offset voltage vs temperature full range 2.5 v/ c offset voltage vs v s = 2.7 v to 18 v, psr full range 5 100 v/v power supply v in+ = 18 v i b input bias current v in ? pin full range 8 23 a output (v sense 20 mv) ina193a, ina196a 20 g gain ina194a, ina197a 25 c 50 v/v ina195a, ina198a 100 25 c 0.2% 1% gain error v sense = 20 mv to 100 mv full range 2% 25 c 0.75% 2.2% total output error (1) full range 1% 3% nonlinearity error v sense = 20 mv to 100 mv 25 c 0.002% 0.1% r o output impedance 25 c 1.5 ? maximum capacitive load no sustained oscillation 25 c 10 nf output (v sense < 20 mv) (2) ? 16 v v cm < 0 300 all devices mv v s < v cm 80 v 300 ina193a, 0.4 ina196a v out output voltage 25 c ina194a, 0 v v cm v s , 1 v ina197a v s = 5 v ina195a, 2 ina198a voltage output (3) swing to v+ power-supply rail r l = 100 k ? to gnd full range v+ ? 0.1 v+ ? 0.2 v swing to gnd (4) r l = 100 k ? to gnd full range v gnd + 3 v gnd + 50 mv (1) total output error includes effects of gain error and v os . (2) for details on this region of operation, see accuracy variations as a result of v sense and common mode voltage . (3) see figure 7 . (4) specified by design copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 5 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com electrical characteristics (continued) v s = 12 v, v in+ = 12 v, v sense = 100 mv (unless otherwise noted) full range t a = ? 40 c to 125 c parameter test conditions t a min typ max unit frequency response ina193a, 500 ina196a ina194a, bw bandwidth c load = 5 pf 25 c 300 khz ina197a ina195a, 200 ina198a phase margin c load < 10 nf 25 c 40 sr slew rate 1 v/ s v sense = 10 mv to 100 mv pp , t s settling time (1%) 25 c 2 s c load = 5 pf noise, rti voltage noise density 25 c 40 nv/ hz power supply v s operating voltage full range 2.7 18 v v out = 2 v full range 700 1250 ina193a, ina194a, 370 950 i q quiescent current ina196a, a v sense = 0 mv full range ina197a ina195a, 370 1050 ina198a temperature range operating temperature ? 40 125 c storage temperature ? 65 150 c 6 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 7 typical characteristics t a = 25 c, v s = 12 v, v in+ = 12 v, and v sense = 100 mv (unless otherwise noted) figure 1. gain vs frequency figure 2. gain vs frequency figure 4. common-mode and power-supply rejection vs figure 3. gain plot frequency figure 5. output error vs vsense figure 6. output error vs common-mode voltage copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 7 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 20 18 16 14 12 10 86 4 2 0 20 100 200 300 400 500 600 700 v out (v) v differential (mv) 800 900 50v/v 20v/v 100v/v 140 130 120 110 100 90 80 70 60 50 40 10 100 1k 10k common- mode and power- supply rejection (db) frequency (hz) 100k cmr psr 45 40 35 30 25 20 15 10 5 10k 100k gain (db) frequency (hz) 1m g = 100 c load = 1000 pf g = 50 g = 20 45 40 35 30 25 20 15 10 5 10k 100k gain (db) frequency (hz) 1m g = 100 g = 50 g = 20 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 ?16 ?12 ?8 ?4 0 4 12 8 20 16 output error (%) common-mode voltage (v) ... 76 80 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 50 100 150 200 250 300 350 output error (% error of the ideal output value) v (mv) sense 400 450 500
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com typical characteristics (continued) t a = 25 c, v s = 12 v, v in+ = 12 v, and v sense = 100 mv (unless otherwise noted) figure 7. positive output voltage swing vs output current figure 8. quiescent current vs output voltage vs=5 v vs =12 v figure 9. input bias current vs common mode voltage figure 10. input bias current vs common mode voltage figure 12. output short circuit current vs supply voltage figure 11. quiescent current vs common mode voltage 8 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 875 775 675 575 475 375 275 175 ?16 ?12 ?8 ?4 0 4 8 12 16 20 i (a) q v (v) cm 76 80 v = 12 v s ... v = 12 v s v = 2.7 v s v = 2.7 v s v = 100 mv sense v = 0 mv sense 34 30 26 22 18 14 10 6 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 output short-circuit current (ma) supply voltage (v) 11.5 17 18 C40c 25c 125c common-mode voltage (v) input bias current ( p a) -20 -10 0 10 20 30 40 50 60 70 80 -12.5 -10 -7.5 -5 -2.5 0 2.5 5 7.5 10 12.5 15 in-in+ d001 common-mode voltage (v) input bias current ( p a) -20 -10 0 10 20 30 40 50 60 70 80 -12.5 -10 -7.5 -5 -2.5 0 2.5 5 7.5 10 12.5 15 d102 in+ in- 1000 900 800 700 600 500 400 300 200 100 0 0 1 2 3 4 5 6 7 i (a) q output voltage (v) 8 9 10 12 11 10 98 7 6 5 4 3 2 1 0 0 5 10 15 20 output voltage (v) output current (ma) 25 30 v = 12 v sourcing current s 25c C40c 125c v = 3 v sourcing current s output stage is designed to source current. current sinking capability is approximately 400 a. 125c 25c C40c
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 typical characteristics (continued) t a = 25 c, v s = 12 v, v in+ = 12 v, and v sense = 100 mv (unless otherwise noted) figure 13. step response figure 14. step response figure 15. step response figure 16. step response figure 17. step response figure 18. step response copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 9 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 time (5 s/div) g = 50 output voltage (100 mv/div) v = 90 mv to 100 mv sense time (2 s/div) g = 20 output voltage (50 mv/div) v = 90 mv to 100 mv sense time (5 s/div) g = 50 output voltage (100 mv/div) v = 10 mv to 20 mv sense output voltage (50 mv/div) time (2 s/div) g = 20 v = 10 mv to 20 mv sense time (2 s/div) g = 20 output voltage (500 mv/div) v = 10 mv to 100 mv sense time (5 s/div) g = 50 output voltage (1 v/div) v = 10 mv to 100 mv sense
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com typical characteristics (continued) t a = 25 c, v s = 12 v, v in+ = 12 v, and v sense = 100 mv (unless otherwise noted) figure 19. step response 10 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 time (10 s/div) g = 100 output voltage (2 v/div) v = 10 mv to 100 mv sense
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 8 detailed description 8.1 overview the ina193a ? ina198a family of current shunt monitors with voltage output can sense drops across shunts at common mode voltages from ? 16 v to 80 v, independent of the ina19x supply voltage. they are available with three output voltage scales: 20 v/v, 50 v/v, and 100 v/v. the 500-khz bandwidth simplifies use in current control loops. the ina193a ? ina195a devices provide identical functions but alternative pin configurations to the ina196a ? ina198a, respectively. the ina193a ? ina198a devices operate from a single 2.7-v to 18-v supply, drawing a maximum of 900 a of supply current. they are specified over the extended operating temperature range ( ? 40 c to 125 c), and are offered in a space-saving sot-23 package. 8.2 functional block diagram 8.3 feature description 8.3.1 basic connection figure 20 shows the basic connection of the ina19xa. the input pins, v in+ and v in ? , should be connected as closely as possible to the shunt resistor to minimize any resistance in series with the shunt resistance. power-supply bypass capacitors are required for stability. applications with noisy or high-impedance power supplies may require additional decoupling capacitors to reject power-supply noise. connect bypass capacitors close to the device pins. copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 11 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 a1 a2 r l (1) v in+ v in v+ out ina193a-ina198a r 1 (1) 5 k : g = 20, r l = 100 k : g = 50, r l = 250 k : g = 100, r l = 500 k : r 1 (1) 5 k : gnd
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com feature description (continued) figure 20. ina19xa basic connections 8.3.2 selecting r s the value chosen for the shunt resistor, r s , depends on the application and is a compromise between small- signal accuracy and maximum permissible voltage loss in the measurement line. high values of r s provide better accuracy at lower currents by minimizing the effects of offset, while low values of r s minimize voltage loss in the supply line. for most applications, best performance is attained with an r s value that provides a full-scale shunt voltage range of 50 mv to 100 mv. maximum input voltage for accurate measurements is 500 mv. 8.3.3 inside the ina19xa the ina19xa uses a new, unique, internal circuit topology that provides common mode range extending from ? 16 v to 80 v while operating from a single power supply. the common mode rejection in a classic instrumentation amplifier approach is limited by the requirement for accurate resistor matching. by converting the induced input voltage to a current, the ina19xa provides common mode rejection that is no longer a function of closely matched resistor values, providing the enhanced performance necessary for such a wide common mode range. a simplified diagram (see figure 20 ) shows the basic circuit function. when the common mode voltage is positive, amplifier a2 is active. the differential input voltage, v in+ ? v in ? applied across r s , is converted to a current through a 5-k ? resistor. this current is converted back to a voltage through r l , and then amplified by the output buffer amplifier. when the common mode voltage is negative, amplifier a1 is active. the differential input voltage, v in+ ? v in ? applied across r s , is converted to a current through a 5-k ? resistor. this current is sourced from a precision current mirror whose output is directed into r l , converting the signal back into a voltage and amplified by the output buffer amplifier. patent-pending circuit architecture ensures smooth device operation, even during the transition period where both amplifiers a1 and a2 are active. 12 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 r s load v in+ C16 v to +80 v i s v in+ v inC 2.7 v to 18 v v+ out 5 k ina193aCina198a 5 k
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 feature description (continued) figure 21. monitor bipolar output power-supply current copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 13 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 load 12 v gnd 5 v r shunt i 1 out for 12-v common mode v+ 5 k v+ gnd r shunt i 2 ina193aCina198a ina193aCina198a C12 v load out for C12-v common mode 5 k 5 k 5 k v in+ v inC v in+ v inC
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com feature description (continued) figure 22. bidirectional current monitoring figure 23. inductive current monitor including flyback 14 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 r shunt solenoid up to 80 v 2.7 v to 18 v out 5 k v+ ina193aCina198a 5 k v in+ v inC load v supply r shunt 5 k ina152 v out 2.5 v v ref v in+ v inC v+ v+ 5 v out out ina193aCina198a ina193aCina198a 5 k 5 k 5 k 5 v 5 v 40 k 40 k 40 k 40 k v in+ v inC
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 feature description (continued) figure 24. ina19xa with comparator 8.3.4 power supply the input circuitry of the ina19xa can accurately measure beyond its power-supply voltage, v+. for example, the v+ power supply can be 5 v, whereas the load power-supply voltage is up to 80 v. the output voltage range of the out terminal, however, is limited by the voltages on the power-supply pin. copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 15 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 r 1 r 2 ref 1.25v internal reference for output signals > comparator trip point (a) ina19xa output adjusted by voltage divider ref 1.25v internal reference r 1 r 2 for use with small output signals. 5 k out v+ out v+ ina193aCina198a ina193aCina198a tlv3012 tlv3012 (b) comparator reference voltage adjusted by voltage divider 5 k v in+ v inC v in+ v inC 5 k 5 k
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com 8.4 device functional modes 8.4.1 input filtering an obvious and straightforward location for filtering is at the output of the ina19xa series; however, this location negates the advantage of the low output impedance of the internal buffer. the only other option for filtering is at the input pins of the ina19xa, which is complicated by the internal 5-k ? 30% input impedance (see figure 25 ). using the lowest possible resistor values minimizes both the initial shift in gain and effects of tolerance. the effect on initial gain is given by: (1) total effect on gain error can be calculated by replacing the 5-k ? term with 5 k ? ? 30% (or 3.5 k ? ) or 5 k ? + 30% (or 6.5 k ? ). the tolerance extremes of r filt can also be inserted into the equation. if a pair of 100- ? 1% resistors are used on the inputs, the initial gain error is 1.96%. worst-case tolerance conditions always occur at the lower excursion of the internal 5-k ? resistor (3.5 k ? ), and the higher excursion of r filt , 3% in this case. the specified accuracy of the ina19xa must then be combined in addition to these tolerances. while this discussion treats accuracy worst-case conditions by combining the extremes of the resistor values, it is appropriate to use geometric mean or root sum square calculations to total the effects of accuracy variations. figure 25. input filter (gain error = 1.5% to ? 2.2%) 8.4.2 accuracy variations as a result of v sense and common mode voltage the accuracy of the ina19xa-q1 current shunt monitors is a function of two main variables: v sense (v in+ ? v in ? ) and common mode voltage, v cm , relative to the supply voltage, v s . v cm is expressed as (v in+ + v in ? )/2; however, in practice, v cm is seen as the voltage at v in+ because the voltage drop across v sense is usually small. 16 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 load v supply f 3db = f 3db 1 2 (2 r filter ) c filter c filter r shunt << r filter r filter < 100 r filter < 100 5 v v+ out 5 k ina193aCina198a 5 k v in+ v inC gain error % = 100 C 100 5 k 5 k + r filt ( (
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 device functional modes (continued) this section addresses the accuracy of these specific operating regions: normal case 1: v sense 20 mv, v cm v s normal case 2: v sense 20 mv, v cm < v s low v sense case 1: v sense < 20 mv, ? 16 v v cm < 0 low v sense case 2: v sense < 20 mv, 0 v v cm v s low v sense case 3: v sense < 20 mv, v s < v cm 80 v 8.4.2.1 normal case 1: v sense 20 mv, v cm v s this region of operation provides the highest accuracy. here, the input offset voltage is characterized and measured using a two-step method. first, the gain is determined by ( equation 2 ). where ? v out1 = output voltage with v sense = 100 mv ? v out2 = output voltage with v sense = 20 mv (2) the offset voltage is then measured at v sense = 100 mv and referred to the input (rti) of the current shunt monitor, as shown in ( equation 3 ). (3) in the typical characteristics , the output error vs common mode voltage curve shows the highest accuracy for the this region of operation. in this plot, v s = 12 v; for v cm 12 v, the output error is at its minimum. this case is also used to create the v sense 20 mv output specifications in the electrical characteristics table. 8.4.2.2 normal case 2: v sense 20 mv, v cm < v s this region of operation has slightly less accuracy than normal case 1 as a result of the common mode operating area in which the part functions, as seen in figure 6 . as noted, for this graph v s = 12 v; for v cm < 12 v, the output error increases as v cm becomes less than 12 v, with a typical maximum error of 0.005% at the most negative v cm = ? 16 v. 8.4.2.3 low v sense case 1: v sense < 20 mv, ? 16 v v cm < 0; and low v sense case 3: v sense < 20 mv, v s < v cm 80 v although the ina19xa-q1 family of devices are not designed for accurate operation in either of these regions, some applications are exposed to these conditions; for example, when monitoring power supplies that are switched on and off while v s is still applied to the ina19xa-q1. it is important to know what the behavior of the devices will be in these regions. as v sense approaches 0 mv, in these v cm regions, the device output accuracy degrades. a larger-than-normal offset can appear at the current shunt monitor output with a typical maximum value of v out = 300 mv for v sense = 0 mv. as v sense approaches 20 mv, v out returns to the expected output value with accuracy as specified in electrical characteristics . figure 26 illustrates this effect using the ina195a and ina198a (gain = 100). copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 17 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 os vout1 v rti (referred to input) 100 mv g ? ? - - = - ? ? out1 out2 v v g 100 mv 20 mv - = -
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com device functional modes (continued) figure 26. example for low v sense cases 1 and 3 (ina195a-q1, ina198a-q1: gain = 100) 8.4.2.4 low v sense case 2: v sense < 20 mv, 0 v v cm v s this region of operation is the least accurate for the ina19xa-q1 family. to achieve the wide input common mode voltage range, these devices use two operational amplifier front ends in parallel. one operational amplifier front end operates in the positive input common mode voltage range, and the other in the negative input region. for this case, neither of these two internal amplifiers dominates and overall loop gain is very low. within this region, v out approaches voltages close to linear operation levels for normal case 2. this deviation from linear operation becomes greatest the closer v sense approaches 0 v. within this region, as v sense approaches 20 mv, device operation is closer to that described by normal case 2. figure 27 illustrates this behavior for the ina195a. the v out maximum peak for this case is tested by maintaining a constant v s , setting v sense = 0 mv and sweeping v cm from 0 v to v s . the exact v cm at which v out peaks during this test varies from part to part, but the v out maximum peak is tested to be less than the specified v out tested limit. (1) ina193, ina196 v out tested limit = 0.4 v ina194, ina197 v out tested limit = 1 v note: v out tested limit at v sense = 0 mv, 0 v cm1 vs. v cm2 , v cm3 , and v cm4 illustrate the variance from part to part of the v cm that can cause maximum v out with v sense < 20 mv. figure 27. example for low v sense case 2 (ina195a, ina198a: gain = 100) 18 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 12 14 16 18 20 22 v out (v) v sense (mv) 24 ina195, ina198 v out tested limit (1) v cm2 v cm3 v cm4 ideal v cm1 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 12 14 16 18 v out (v) v sense (mv) 20 actual ideal
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 device functional modes (continued) 8.4.3 shutdown because the ina19xa-q1 consume a quiescent current less than 1 ma, they can be powered by either the output of logic gates or by transistor switches to supply power. use a totem pole output buffer or gate that can provide sufficient drive along with 0.1 f bypass capacitor, preferably ceramic with good high frequency characteristics. this gate should have a supply voltage of 3 v or greater because the ina19xa-q1 requires a minimum supply greater than 2.7 v. in addition to eliminating quiescent current, this gate also turns off the 10 a bias current present at each of the inputs. an example shutdown circuit is shown in figure 28 . figure 28. ina19xa-q1 example shutdown circuit 8.4.4 transient protection the ? 16-v to 80-v common mode range of the ina19xa is ideal for withstanding automotive fault conditions ranging from 12-v battery reversal up to 80-v transients, because no additional protective components are needed up to those levels. in the event that the ina19xa is exposed to transients on the inputs in excess of its ratings, then external transient absorption with semiconductor transient absorbers (zeners or transzorbs) are necessary. ti does not recommend using movs or vdrs except when they are used in addition to a semiconductor transient absorber. select the transient absorber such that it never allows the ina19xa to be exposed to transients greater than 80 v (that is, allow for transient absorber tolerance, as well as additional voltage due to transient absorber dynamic impedance). despite the use of internal zener-type esd protection, the ina19xa does not lend itself to using external resistors in series with the inputs because the internal gain resistors can vary up to 30%. (if gain accuracy is not important, then resistors can be added in series with the ina19xa inputs with two equal resistors on each input.) 8.4.5 output voltage range the output of the ina19xa is accurate within the output voltage swing range set by the power supply pin, v+. this is best illustrated when using the ina195a or ina198a (which are both versions using a gain of 100), where a 100-mv full-scale input from the shunt resistor requires an output voltage swing of 10 v, and a power-supply voltage sufficient to achieve 10 v on the output. copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 19 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 a2 r l ina193a ina198a - out r s a1 0.1 f m load v+ i l r 1 r 2 v in+ v in+ v in - - 16 v to 80 v negative and positive common-mode voltage v+ 3 v >
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com 9 application and implementation note information in the following applications sections is not part of the ti component specification, and ti does not warrant its accuracy or completeness. ti ? s customers are responsible for determining suitability of components for their purposes. customers should validate and test their design implementation to confirm system functionality. 9.1 application information the ina193a-ina198a devices measure the voltage developed across a current-sensing resistor when current passes through it. the ability to have shunt common mode voltages from ? 16-v to 80-v drive and control the output signal with vs offers multiple configurations, as discussed throughout this section. 9.2 typical application the device is a unidirectional, current-sense amplifier capable of measuring currents through a resistive shunt with shunt common mode voltages from ? 16 v to 80 v. two devices can be configured for bidirectional monitoring and is common in applications that include charging and discharging operations where the current flow-through resistor can change directions. figure 29. bidirectional current monitoring 9.2.1 design requirements vsupply is set to 12 v, vref at 2.5 v and a 10-m shunt. the accuracy of the current will typically be less than 0.5% for current greater than 2 a. for current lower than 2 a, the accuracy will vary; use the accuracy variations as a result of v sense and common mode voltage section for accuracy considerations. 20 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 load v supply r shunt 5 k ina152 v out 2.5 v v ref v in+ v inC v+ v+ 5 v out out ina193aCina198a ina193aCina198a 5 k 5 k 5 k 5 v 5 v 40 k 40 k 40 k 40 k v in+ v inC
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 typical application (continued) 9.2.2 detailed design procedure the ability to measure this current flowing in both directions is enabled by adding a unity gain amplifier with a v ref , as shown in figure 29 . the output then responds by increasing above vref for positive differential signals (relative to the in ? pin) and responds by decreasing below vref for negative differential signals. this reference voltage applied to the ref pin can be set anywhere from 0 v to v+. for bidirectional applications, vref is typically set at mid- scale for equal signal range in both current directions. in some cases, however, vref is set at a voltage other than mid-scale when the bidirectional current and corresponding output signal are not required to be symmetrical. 9.2.3 application curve an example output response of a bidirectional configuration is shown in figure 30 . with the ref pin connected to a reference voltage, 2.5 v in this case, the output voltage is biased upwards by this reference level. the output rises above the reference voltage for positive differential input signals and falls below the reference voltage for negative differential input signals. figure 30. output voltage vs shunt input current 10 power supply recommendations the input circuitry of the ina193a-ina198a devices can accurately measure beyond its power-supply voltage, v+. for example, the v+ power supply can be 5 v, whereas the load power-supply voltage is up to 80 v. the output voltage range of the out terminal, however, is limited by the voltages on the power-supply pin. copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 21 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 time (s) current (i), voltage (v) 0 2 4 6 8 10 12 14 16 18 -10 -7.5 -5 -2.5 0 2.5 5 7.5 10 i_in vout 20
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 sbos366d ? august 2006 ? revised july 2015 www.ti.com 11 layout 11.1 layout guidelines 11.1.1 rfi/emi ti always recommends adhering to good layout practices. keep traces short and, when possible, use a printed- circuit-board (pcb) ground plane with surface-mount components placed as close to the device pins as possible. small ceramic capacitors placed directly across amplifier inputs can reduce rfi/emi sensitivity. pcb layout should locate the amplifier as far away as possible from rfi sources. sources can include other components in the same system as the amplifier itself, such as inductors (particularly switched inductors handling a lot of current and at high frequencies). rfi can generally be identified as a variation in offset voltage or dc signal levels with changes in the interfering rf signal. if the amplifier cannot be located away from sources of radiation, shielding may be needed. twisting wire input leads makes them more resistant to rf fields. the difference in input pin location of the ina193a ? ina195a versus the ina196a ? ina198a may provide different emi performance. 11.2 layout example figure 31. recommended layout 22 submit documentation feedback copyright ? 2006 ? 2015, texas instruments incorporated product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1 supply bypass capacitor via to power or ground plane via to internal layer supply voltage out gnd in+ in- v+ shunt resistor output signal
ina193a-q1 , ina194a-q1 , ina195a-q1 ina196a-q1 , ina197a-q1 , ina198a-q1 www.ti.com sbos366d ? august 2006 ? revised july 2015 12 device and documentation support 12.1 related links the following table lists quick access links. categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. table 1. related links technical tools & support & parts product folder sample & buy documents software community ina193a-q1 click here click here click here click here click here ina194a-q1 click here click here click here click here click here ina195a-q1 click here click here click here click here click here ina196a-q1 click here click here click here click here click here ina197a-q1 click here click here click here click here click here ina198a-q1 click here click here click here click here click here 12.2 community resources the following links connect to ti community resources. linked contents are provided "as is" by the respective contributors. they do not constitute ti specifications and do not necessarily reflect ti's views; see ti's terms of use . ti e2e ? online community ti's engineer-to-engineer (e2e) community. created to foster collaboration among engineers. at e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. design support ti's design support quickly find helpful e2e forums along with design support tools and contact information for technical support. 12.3 trademarks e2e is a trademark of texas instruments. all other trademarks are the property of their respective owners. 12.4 electrostatic discharge caution these devices have limited built-in esd protection. the leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the mos gates. 12.5 glossary slyz022 ? ti glossary . this glossary lists and explains terms, acronyms, and definitions. 13 mechanical, packaging, and orderable information the following pages include mechanical, packaging, and orderable information. this information is the most current data available for the designated devices. this data is subject to change without notice and revision of this document. for browser-based versions of this data sheet, refer to the left-hand navigation. copyright ? 2006 ? 2015, texas instruments incorporated submit documentation feedback 23 product folder links: ina193a-q1 ina194a-q1 ina195a-q1 ina196a-q1 ina197a-q1 ina198a-q1
package option addendum www.ti.com 1-jul-2015 addendum-page 1 packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish (6) msl peak temp (3) op temp (c) device marking (4/5) samples ina193aqdbvrq1 active sot-23 dbv 5 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 125 bog ina194aqdbvrq1 active sot-23 dbv 5 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 125 boh ina195aqdbvrq1 active sot-23 dbv 5 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 125 boi ina196aqdbvrq1 active sot-23 dbv 5 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 125 boj ina197aqdbvrq1 active sot-23 dbv 5 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 125 bok ina198aqdbvrq1 active sot-23 dbv 5 3000 green (rohs & no sb/br) cu nipdau level-2-260c-1 year -40 to 125 bol (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - the planned eco-friendly classification: pb-free (rohs), pb-free (rohs exempt), or green (rohs & no sb/br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. tbd: the pb-free/green conversion plan has not been defined. pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. pb-free (rohs exempt): this component has a rohs exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. the component is otherwise considered pb-free (rohs compatible) as defined above. green (rohs & no sb/br): ti defines "green" to mean pb-free (rohs compatible), and free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material) (3) msl, peak temp. - the moisture sensitivity level rating according to the jedec industry standard classifications, and peak solder temperature. (4) there may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) multiple device markings will be inside parentheses. only one device marking contained in parentheses and separated by a "~" will appear on a device. if a line is indented then it is a continuation of the previous line and the two combined represent the entire device marking for that device.
package option addendum www.ti.com 1-jul-2015 addendum-page 2 (6) lead/ball finish - orderable devices may have multiple material finish options. finish options are separated by a vertical ruled line. lead/ball finish values may wrap to two lines if the finish value exceeds the maximum column width. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis.
tape and reel information *all dimensions are nominal device package type package drawing pins spq reel diameter (mm) reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p1 (mm) w (mm) pin1 quadrant ina193aqdbvrq1 sot-23 dbv 5 3000 178.0 9.0 3.3 3.2 1.4 4.0 8.0 q3 ina194aqdbvrq1 sot-23 dbv 5 3000 178.0 9.0 3.3 3.2 1.4 4.0 8.0 q3 ina195aqdbvrq1 sot-23 dbv 5 3000 178.0 9.0 3.3 3.2 1.4 4.0 8.0 q3 ina196aqdbvrq1 sot-23 dbv 5 3000 178.0 9.0 3.3 3.2 1.4 4.0 8.0 q3 ina197aqdbvrq1 sot-23 dbv 5 3000 178.0 9.0 3.3 3.2 1.4 4.0 8.0 q3 ina198aqdbvrq1 sot-23 dbv 5 3000 178.0 9.0 3.3 3.2 1.4 4.0 8.0 q3 package materials information www.ti.com 1-jul-2015 pack materials-page 1
*all dimensions are nominal device package type package drawing pins spq length (mm) width (mm) height (mm) ina193aqdbvrq1 sot-23 dbv 5 3000 190.0 190.0 30.0 ina194aqdbvrq1 sot-23 dbv 5 3000 190.0 190.0 30.0 ina195aqdbvrq1 sot-23 dbv 5 3000 190.0 190.0 30.0 ina196aqdbvrq1 sot-23 dbv 5 3000 190.0 190.0 30.0 ina197aqdbvrq1 sot-23 dbv 5 3000 190.0 190.0 30.0 ina198aqdbvrq1 sot-23 dbv 5 3000 190.0 190.0 30.0 package materials information www.ti.com 1-jul-2015 pack materials-page 2

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