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Micropower, Rail to Rail Input Current Sense Amplifier with Voltage Output
ISL28006
The ISL28006 is a micropower, uni-directional high-side and low-side current sense amplifier featuring a proprietary rail-to-rail input current sensing amplifier. The ISL28006 is ideal for high-side current sense applications where the sense voltage is usually much higher than the amplifier supply voltage. The device can be used to sense voltages as high as 28V when operating from a supply voltage as low as 2.7V. The micropower ISL28006 consumes only 50A of supply current when operating from a 2.7V to 28V supply. The ISL28006 features a common-mode input voltage range from 0V to 28V. The proprietary architecture extends the input voltage sensing range down to 0V, making it an excellent choice for low-side ground sensing applications. The benefit of this architecture is that a high degree of total output accuracy is maintained over the entire 0V to 28V common mode input voltage range. The ISL28006 is available in fixed (100V/V, 50V/V, 20V/V and Adjustable) gains in the space saving 5 Ld SOT-23 package and the 6 Ld SOT-23 package for the adjustable gain part. The parts operate over the extended temperature range from -40C to +125C.
ISL28006
Features
* Low Power Consumption . . . . . . . . . . . . . 50A,Typ * Supply Range. . . . . . . . . . . . . . . . . . . 2.7V to 28V * Wide Common Mode Input . . . . . . . . . . . 0V to 28V * Gain Versions - ISL28006-100 . - ISL28006-50. . - ISL28006-20. . - ISL28006-ADJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........... ........... ........... .ADJ (Min Gain . 100V/V . . 50V/V . . 20V/V = 20V/V)
* Operating Temperature Range . . . . -40C to +125C * Packages . . . . . . . . . . . . 5 Ld SOT-23, 6 Ld SOT-23
Applications*(see page 23)
* Power Management/Monitors * Power Distribution and Safety * DC/DC, AC/DC Converters * Battery Management/Charging * Automotive Power Distribution
Related Literature*(see page 23)
* See AN1532 for "ISL28006 Evaluation Board User's Guide"
Typical Application
SENSE +12VDC RSENSE +12VDC OUTPUT +5VDC ISL28006 + ISENSE +12VDC
Gain Accuracy vs VRS+ = 0V to 28V
0.6 0.4 0.2 ACCURACY (%) 0 -0.2 -0.4 -0.6 -0.8 -1 -1.2 -1.4 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 +100C -40C +25C +125C GAIN 100
SENSE +5VDC RSENSE
+5VDC OUTPUT +5VDC ISENSE +5VDC +1.0VDC OUTPUT ISENSE +1.0VDC
ISL28006 +
SENSE +1.0VDC MULTIPLE OUTPUT POWER SUPPLY GND RSENSE
+5VDC ISL28006 +
VRS+ (V)
May 27, 2010 FN6548.3
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL28006
Block Diagram
VCC I = 2.86A VSENSE RS+ R1 RSR2 + OUT Rf Rg gmHI HIGH-SIDE AND LOW-SIDE SENSING
VCC I = 2.86A VSENSE RS+ R1 RSR2 1.35V R3 + OUT Rf FB gmLO IMIRROR R5 VSENSE GND Rg gmHI HIGH-SIDE AND LOW-SIDE SENSING
1.35V R3
gmLO
R5 VSENSE
R44 R
IMIRROR
GND
R44 R
FIXED GAIN PARTS
ADJUSTABLE GAIN PART
Pin Configurations
ISL28006-100, 50, 20 (5 LD SOT-23) TOP VIEW
GND 1 OUT 2 VCC 3 FIXED GAIN 4 RS+ 5 RS-
ISL28006-ADJ (6 LD SOT-23) TOP VIEW
FB 1 OUT 2 VCC 3 ADJ. GAIN 6 GND 5 RS4 RS+
Pin Descriptions
ISL28006-100, 50, 20 (5 LD SOT-23) 1 2 3 4 5 ISL28006-ADJ (6 LD SOT-23) 6 1 2 3 4 5
FB VCC RS-
PIN NAME GND FB OUT VCC RS+ RSPower Ground
DESCRIPTION Input Pin for External Resistors Amplifier Output Positive Power Supply Sense Voltage Non-inverting Input Sense Voltage Inverting Input
CAPACITIVELY COUPLED ESD CLAMP
OUT
RS+ GND
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ISL28006
Ordering Information
PART NUMBER (Notes 1, 2, 3) ISL28006FH100Z-T7 ISL28006FH50Z-T7 ISL28006FH20Z-T7 ISL28006FHADJZ-T7 ISL28006FH-100EVAL1Z ISL28006FH-50EVAL1Z ISL28006FH-20EVAL1Z ISL28006FH-ADJEVAL1Z NOTES: 1. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL28006. For more information on MSL please see techbrief TB363. 4. The part marking is located on the bottom of the part. GAIN 100V/V 50V/V 20V/V ADJ PART MARKING (Note 4) BDJA BDHA BDGA BDFA PACKAGE Tape & Reel (Pb-Free) 5 Ld SOT-23 5 Ld SOT-23 5 Ld SOT-23 6 Ld SOT-23 PKG. DWG. # P5.064A P5.064A P5.064A P6.064
100V/V Evaluation Board 50V/V Evaluation Board 20V/V Evaluation Board Adjustable Evaluation Board
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Absolute Maximum Ratings
Max Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 28V Max Differential Input Current . . . . . . . . . . . . . . . . . 20mA Max Differential Input Voltage . . . . . . . . . . . . . . . . . .+0.5V Max Input Voltage (RS+, RS-, FB). . . . . . . GND - 0.5V to 30V Max Input Current for Input Voltage Thermal Information
Thermal Resistance (Typical) JA (C/W) JC (C/W) 5 Ld SOT-23 (Notes 5, 6) . . . . . . . 190 90 6 Ld SOT-23 (Notes 5, 6) . . . . . . . 180 90 Maximum Storage Temperature Range . . . -65C to +150C Maximum Junction Temperature (TJMAX) . . . . . . . . . +150C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Ambient Temperature Range (TA) . . . . . . . -40C to +125C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.
NOTES: 5. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 6. For JC, the "case temp" location is taken at the package top center.
Electrical Specifications VCC = 12V, VRS+ = 0V to 28V, VSENSE = 0V, RLOAD = 1M, TA = +25C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40C to +125C. Temperature data established by characterization. CONDITIONS VCC = VRS+ = 12V, VSENSE = 20mV to 100mV VCC = 12V, VRS+ = 0.2V, VSENSE = 20mV to 100mV Gain = 50, Gain = 20 (Notes 8, 9) VCC = VRS+ = 12V, VSENSE = 20mV to 100mV VCC = 12V, VRS+ = 0.2V, VSENSE = 20mV to 100mV Adjustable, Gain = 21 Rf = 100k, Rg = 5k (Notes 8, 9) VCC = VRS+ = 12V, VSENSE = 20mV to 100mV VCC = 12V, VRS+ = 0.2V, VSENSE = 20mV to 100mV IRS+, IRS Leakage Current VCC = 0V, VRS+ = 28V MIN (Note 7) -250 -300 -2.5 -2.8 -300 -450 -2.8 -3.2 -300 -450 -3.1 -3.4 0.041 -1.2 60 -1.2 60 -1.2 TYP 60 MAX (Note 7) UNIT 250 300 2.5 2.8 300 450 2.8 3.2 300 450 3.1 3.4 1.2 1.5 V V mV mV V V mV mV V V mV mV A A
PARAMETER VOS (Input Offset Voltage)
DESCRIPTION Gain = 100 (Notes 8, 9)
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Electrical Specifications VCC = 12V, VRS+ = 0V to 28V, VSENSE = 0V, RLOAD = 1M, TA = +25C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40C to +125C. Temperature data established by characterization. (Continued) CONDITIONS VRS+ = 2V, VSENSE = 5mV MIN (Note 7) TYP 4.7 MAX (Note 7) UNIT 6 7 VRS+ = 0V, VSENSE = 5mV -500 -600 Gain = 50, Gain = 20 VRS+ = 2V, VSENSE = 5mV 4.7 6 8 VRS+ = 0V, VSENSE = 5mV -700 -840 ADJ Gain = 101 Rf = 100k, Rg = 1k VRS+ = 2V, VSENSE = 5mV 4.7 6 7 VRS+ = 0V, VSENSE = 5mV -500 -600 IRS (- Input Bias Current) G = 100, 50, 20, ADJ VRS+ = 2V, VSENSE = 5mV 5 50 75 VRS+ = 0V, VSENSE = 5mV -125 -130 CMRR PSRR VFS G (Gain) Common Mode Rejection Ratio VRS+ = 2V to 28V Power Supply Rejection Ratio Full-scale Sense Voltage (Note 8) VCC = 2.7V to 28V, VRS+ = 2V VCC = 28V, VRS+ = 0.2V, 12V ISL28006-100 ISL28006-50 ISL28006-20 ISL28006-ADJ GA Gain = 100 (Gain Accuracy) (Note 10) VCC = VRS+ = 12V, VSENSE = 20mV to 100mV VCC = 12V, VRS+ = 0.1V, VSENSE = 20mV to 100mV Gain = 50, Gain = 20 (Note 10) VCC = VRS+ = 12V, VSENSE = 20mV to 100mV VCC = 12V, VRS+ = 0.1V, VSENSE = 20mV to 100mV ADJ Gain = 21 Rf = 100k, Rg = 5k (Note 10) VCC = VRS+ = 12V, VSENSE = 20mV to 100mV VCC = 12V, VRS+ = 0.1V, VSENSE = 20mV to 100mV -0.35 -1 -2.2 -2.3 -0.65 -1 -2.2 -2.3 -0.33 -0.33 20 -0.2 -1 -0.25 0.7 1 2.2 2.3 1 1.05 2.2 2.3 0.7 1 105 90 200 100 50 20 115 105 -45 -432 -432 -432 A A nA nA A A nA nA A A nA nA nA nA nA nA dB dB mV V/V V/V V/V V/V % % % % % % % % % %
PARAMETER IRS+ (+ Input Bias Current)
DESCRIPTION Gain = 100
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Electrical Specifications VCC = 12V, VRS+ = 0V to 28V, VSENSE = 0V, RLOAD = 1M, TA = +25C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40C to +125C. Temperature data established by characterization. (Continued) CONDITIONS VCC = VRS+ = 12V, VSENSE = 100mV MIN (Note 7) -0.7 -0.9 VCC = 12V, VRS+ = 0.1V, VSENSE = 100mV Gain = 50, Gain = 20 (Note 11) VCC = VRS+ = 12V, VSENSE = 100mV -0.7 -0.9 VCC = 12V, VRS+ = 0.1V, VSENSE = 100mV -4.7 -5.2 ADJ Gain = 21 Rf = 100k, Rg = 5k (Note 11) VCC = VRS+ = 12V, VSENSE = 100mV -0.7 -0.9 VCC = 12V, VRS+ = 0.1V, VSENSE = 100mV -4.7 -5.2 VOH VOL ROUT ISC+ ISCIS Output Voltage Swing, High VCC - VOUT Output Voltage Swing, Low VOUT Output Resistance IO = -500A, VCC = 2.7V, VSENSE = 100mV, VRS+ = 2V IO = 500A, VCC = 2.7V VSENSE = 0V, VRS+ = 2V VCC = VRS+ = 12V, VSENSE = 100mV IOUT = 10A to 1mA 39 30 6.5 4.8 8.7 50 59 62 Gain = 50, 20, VRS+ > 2V, VSENSE = 5mV 50 62 63 ADJ Gain = 21 Rf = 100k, Rg = 5k VCC Slew Rate Supply Voltage Gain = 100 Gain = 50 Gain = 20 ADJ Gain = 21 Rf = 100k, Rg = 5k VRS+ > 2V, VSENSE = 5mV 50 62 63 Guaranteed by PSRR Pulse on RS+ pin, VOUT = 8VP-P (Figure 65) Pulse on RS+ pin, VOUT = 8VP-P (Figure 65) Pulse on RS+ pin, VOUT = 3.5VP-P (Figure 65) Pulse on RS+ pin, VOUT = 3.5VP-P (Figure 65) 2.7 0.58 0.58 0.50 0.50 0.76 0.67 0.67 0.67 28 -1.41 -1.41 -1.25 0.7 0.9 1.8 2.3 1.05 1.2 1.8 2.3 50 50 TYP MAX (Note 7) UNIT 0.7 0.9 % % % % % % % % % % % mV mV mA mA A A A A A A V V/s V/s V/s V/s
PARAMETER VOA (Total Output Accuracy)
DESCRIPTION Gain = 100 (Note 11)
Short Circuit Sourcing Current VCC = VRS+ = 5V, RL = 10 Short Circuit Sinking Current Gain = 100 VCC = VRS+ = 5V, RL = 10 VRS+ > 2V, VSENSE = 5mV
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Electrical Specifications VCC = 12V, VRS+ = 0V to 28V, VSENSE = 0V, RLOAD = 1M, TA = +25C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40C to +125C. Temperature data established by characterization. (Continued) CONDITIONS VRS+ = 12V, 0.1V, VSENSE = 100mV VRS+ = 12V, 0.1V, VSENSE = 100mV VRS+ = 12V, 0.1V, VSENSE = 100mV VRS+ = 12V, 0.1V, VSENSE = 100mV, Rf = 100k, Rg = 1k VRS+ = 12V, VSENSE = 100mV, Rf = 100k, Rg = 2k VRS+ = 0.1V, VSENSE = 100mV, Rf = 100k, Rg = 2k ADJ, Gain = 21 (Figure 57) VRS+ = 12V, VSENSE = 100mV, Rf = 100k, Rg = 5k VRS+ = 0.1V, VSENSE = 100mV, Rf = 100k, Rg = 5k tS Output Settling Time to 1% of VCC = VRS+ = 12V, VOUT = 10V step, Final Value VSENSE > 7mV VCC = VRS+ = 0.2V, VOUT = 10V step, VSENSE > 7mV Capacitive-Load Stability tS Power-up No sustained oscillations MIN (Note 7) TYP 110 160 180 40 78 122 131 237 15 20 300 15 50 10 MAX (Note 7) UNIT kHz kHz kHz kHz kHz kHz kHz kHz s s pF s s s
PARAMETER BW-3dB
DESCRIPTION Gain = 100 Gain = 50 Gain = 20 ADJ, Gain = 101 (Figure 57) ADJ, Gain = 51 (Figure 57)
Power-Up Time to 1% of Final VCC = VRS+ = 12V, VSENSE = 100mV Value VCC = 12V, VRS+ = 0.2V VSENSE = 100mV Saturation Recovery Time VCC = VRS+ = 12V, VSENSE = 100mV, overdrive
NOTES: 7. Parameters with MIN and/or MAX limits are 100% tested at +25C, unless otherwise specified. Temperature limits established by characterization and are not production tested. 8. DEFINITION OF TERMS: * VSENSEA = VSENSE @ 100mV * VSENSEB = VSENSE @ 20mV * VOUTA = VOUT @ VSENSEA = 100mV * VOUTB = VOUT @ VSENSEB = 20mV V OUT A - V OUT B * G = GAIN = ------------------------------------------------------------- V SENSE A - V SENSE B V OUT A 9. VOS is extrapolated from the gain measurement. V OS = V SENSE A - ------------------G G MEASURED - G EXPECTED 10. % Gain Accuracy = GA = ------------------------------------------------------------------------------ x 100 G EXPECTED VOUT MEASURED - VOUT EXPECTED 11. Output Accuracy % VOA = --------------------------------------------------------------------------------------------------------- x 100 where VOUT = VSENSE X GAIN and VSENSE = 100mV VOUT EXPECTED
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Typical Performance Curves
1.8 1.6 1.4 1.2 VOLTS (V) 1.0 0.8 0.6 0.4 0.2 0 0 0.2 0.4 0.6 0.8 1.0 1.2 TIME (ms) 1.4 1.6 1.8 VRS+
Vcc = 12V, RL = 1M, unless otherwise specified.
2.4 VRS+ 2.0 12 10 8 6 4 2 0 2.0 VOUT (V)
VTH(L-H) = 1.52V VRS+ (V) VTH(H-L) = 1.23V 1.6 1.2 0.8 G100, VOUT = 1V G50, VOUT = 500mV G20, VOUT = 200mV 2.0 0.4 0
VOUT (G = 100) RL = 1M VCC = 12V
VOUT (G = 100)
G100, VOUT = 2V G50, VOUT = 1V G20, VOUT = 400mV 0 0.2 0.4 0.6 0.8 1.0 1.2 TIME (ms) 1.4 1.6 1.8
FIGURE 1. HIGH-SIDE and LOW-SIDE THRESHOLD VOLTAGE VRS+(L-H) and VRS+(H-L), VSENSE = 10mV
FIGURE 2. VOUT vs VRS+, VSENSE = 20mV TRANSIENT RESPONSE
12 GAIN 100 10 8 VOUT (V) VOUT (V) 6 4 2 0
12 GAIN 100 10 8 6 4 2 0
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
TIME (s)
40 50 60 TIME (s)
70
80
90
100
FIGURE 3. LARGE SIGNAL TRANSIENT RESPONSE VRS+ = 0.2V, VSENSE = 100mV
FIGURE 4. LARGE SIGNAL TRANSIENT RESPONSE VRS+ = 12V, VSENSE = 100mV
20
GAIN 100 18 VSENSE = 20mV, 100mV 16 14 UNITS 12 10 8 6 4 2 0 -250 -200 -150 -100 -50 VOS (V) 0 50 100 VOS (V)
2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400
GAIN 100 VSENSE = 20mV, 100mV
+125C
+100C
-40C 0 2 4 6 8
+25C
10 12 14 16 18 20 22 24 26 28 VRS+ (V)
FIGURE 5. VOS (V) DISTRIBUTION AT +25C, VRS+ = 12V, QUANTITY: 100
FIGURE 6. VOS vs VRS+
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Typical Performance Curves
2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400 GAIN 100 VSENSE = 20mV, 100mV +100C
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
250 200 150 100 VOS (V) 50 0 -50 -40C +125C GAIN 100 VSENSE = 2mV, 20mV 4 6 8 10 12 14 16 18 20 22 24 26 28 VCC (V)
+100C +25C
+125C
VOS (V)
-40C
+25C
-100 -150 -200 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -250 2
VRS+ (V)
FIGURE 7. VOS vs VRS+
FIGURE 8. VOS vs VCC, VRS+= 12V
3000 +100C 2000 1000 VOS (V) -40C 0 +25C
GAIN 100 VSENSE = 2mV, 20mV
0.6 0.4 0.2 ACCURACY (%) 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2
+100C
-40C
+25C +125C
+125C
-1000 -2000 -3000
2
4
6
8
10 12 14 16 18 20 22 24 26 28 VCC (V)
-1.4
GAIN 100 VSENSE = 20mV, 100mV 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 VRS+ (V)
FIGURE 9. VOS vs VCC, VRS+ = 0.1V
FIGURE 10. GAIN ACCURACY vs VRS+ = 0V TO 28V
0.6 0.4 0.2 ACCURACY (%) 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4 0 0.2 0.4 0.6 +125C
+25C
ACCURACY (%)
+100C
-40C
GAIN 100 VSENSE = 20mV, 100mV 0.8 1.0 1.2 VRS+ (V) 1.4 1.6 1.8 2.0
3.0 2.5 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -5
+100C
+25C
-40C
+125C
GAIN 100 VSENSE = 2mV, 20mV 2 4 6 8 10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 11. GAIN ACCURACY vs VRS+ = 0V TO 2V
FIGURE 12. GAIN ACCURACY vs VCC, VRS+ = 12V
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Typical Performance Curves
2 0 -2 ACCURACY (%) -4 -6 -8 -10 -12 -14 -16 -18 -20 2 4 6 8 GAIN 100 VSENSE = 2mV, 20mV +100C +125C +25C -40C
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
0.2 VOA PERCENT ACCURACY (%) 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1.0 1 10 100 IOUT(A) +25C 1m 10m +100C -40C +125C GAIN 100
10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 13. GAIN ACCURACY vs VCC, VRS+ = 0.1V
FIGURE 14. NORMALIZED VOA vs IOUT
45 35 GAIN 100 25 GAIN (dB) VRS+= 100mV VRS+ = 12V VOS (V) 15 5 -5 VCC = 12V -15 V SENSE = 100mV AV = 100 -25 RL = 1M -35 10 100
40 20 0 -20 -40 -60 -80 1k 10k FREQUENCY (Hz) 100k 1M -100 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125 GAIN 100 VSENSE = 20mV, 100mV VRS+ = 12V
FIGURE 15. GAIN vs FREQUENCY VRS+ = 100mV/12V, VSENSE = 100mV, VOUT = 50mVP-P
FIGURE 16. VOS (V) vs TEMPERATURE
0.30 0.25 GAIN ACCURACY (%) 0.20 0.15 0.10 0.05 0 -0.05 -0.10 -50 -25 0 25
GAIN 100 VSENSE = 20mV, 100mV VRS+ = 12V VOUT ERROR (%)
-0.5 GAIN 100 -0.6 VRS+ = 12V
-0.7
-0.8
-0.9
50
75
100
125
-1 -50
-25
0
TEMPERATURE (C)
25 50 75 TEMPERATURE (C)
100
125
FIGURE 17. GAIN ACCURACY (%) vs TEMPERATURE
FIGURE 18. VOUT ERROR (%) vs TEMPERATURE
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Typical Performance Curves
20 GAIN 50 18 VSENSE = 20mV, 100mV 16 14
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400 GAIN 50 VSENSE = 20mV, 100mV
10 8 6 4 2 0 -250 -200 -150 -100 -50 VOS (V) 0 50 100
VOS (V)
UNITS
12
+125C
+100C
-40C 0 2 4 6 8 VRS+ (V)
+25C
10 12 14 16 18 20 22 24 26 28
FIGURE 19. VOS (V) DISTRIBUTION AT +25C, VRS+ = 12V, QUANTITY: 100
FIGURE 20. VOS vs VRS+
2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400
+125C
GAIN 50 VSENSE = 20mV, 100mV
250 200 150 +100C
GAIN 50 VSENSE = 2mV, 0mV
+100C +25C -40C
100 VOS (V) 50 0 -50 +25C +125C
VOS (V)
-100 -150 -200 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -250 2 4 6 -40C
8
VRS+ (V)
10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 21. VOS vs VRS+
FIGURE 22. VOS vs VCC, VRS+ = 12V
3000 2000 1000 VOS (V)
+100C
+25C
0.6 0.4 0.2 +25C -40C
-40C 0
+125C
ACCURACY (%)
0 -0.2 -0.4 -0.6 -0.8 -1.0 GAIN 50 VSENSE = 20mV, 100mV 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 VRS+ (V) +100C +125C
-1000 -2000 -3000
GAIN 50 VSENSE = 2mV, 0mV 2 4 6 8 10 12 14 16 18 20 22 24 26 28 VCC (V)
-1.2 -1.4
FIGURE 23. VOS vs VCC, VRS+ = VRS+ = 0.1V
FIGURE 24. GAIN ACCURACY vs VRS+ = 0V TO 28V
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Typical Performance Curves
0.6 0.4 0.2 ACCURACY (%) 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4 0 0.2 +125C 0.4 0.6 -40C GAIN 50 VSENSE = 20mV, 100mV 1.4 1.6 1.8 +100C +25C
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
3.0 2.5 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -5.0
+100C
+25C
-40C
ACCURACY (%)
+125C
GAIN 50 VSENSE = 2mV, 20mV 2 4 6 8 10 12 14 16 18 20 22 24 26 28 VCC (V)
0.8 1.0 1.2 VRS+ (V)
2.0
FIGURE 25. GAIN ACCURACY vs VRS+ = 0V TO 2V
FIGURE 26. GAIN ACCURACY vs VCC, HIGH-SIDE
2 VOA PERCENT ACCURACY (%) 0 -2 ACCURACY (%) -4 -6 -8 -10 -12 -14 -16 -18 -20 2 4 6 8 +125C +100C +25C -40C
0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1.0 1 10 100 IOUT(A) -40C +125C +100C +25C 1m 10m GAIN 50
GAIN 50 VSENSE = 2mV, 20mV 10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 27. GAIN ACCURACY vs VCC, LOW-SIDE
FIGURE 28. NORMALIZED VOA vs IOUT
45 35 25 GAIN (dB)
GAIN 50
-70 -90 -110 VOS (V) -130 -150 -170 -190 -210
GAIN 50 VSENSE = 20mV, 100mV VRS+ = 12V
15 5 -5 -15 V SENSE = 100mV A = 100 -25 V RL = 1M -35 10 100 VCC = 12V VRS+= 100mV VRS+ = 12V
1k 10k FREQUENCY (Hz)
100k
1M
-230 -50
-25
0
25 50 75 TEMPERATURE (C)
100
125
FIGURE 29. GAIN vs FREQUENCY VRS+ = 100mV/12V, VSENSE = 100mV, VOUT = 50mVP-P
FIGURE 30. VOS (V) vs TEMPERATURE
12
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Typical Performance Curves
0.18 0.17 GAIN ACCURACY (%) 0.16 0.15 0.14 0.13 0.12 0.11 0.1 -50 -25 0 25 50 75 100 GAIN 50 VSENSE = 20mV, 100mV VRS+ = 12V
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
0.10 0.08 0.06 VOUT ERROR (%) 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 -0.10 125 -0.12 -50 -25 0 25 50 75 TEMPERATURE (C) 100 125 GAIN 50 VRS+ = 12V
TEMPERATURE (C)
FIGURE 31. GAIN ACCURACY (%) vs TEMPERATURE
FIGURE 32. VOUT ERROR (%) vs TEMPERATURE
30 25 20 15 10 5 0
GAIN 20 VSENSE = 20mV, 100mV
-250
-200
-150
-100
-50 0 VOS (V)
50
100
150
2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400
GAIN 20 VSENSE = 20mV, 100mV
VOS (V)
UNITS
+125C
+100C
-40C 0 2 4 6 8 VRS+ (V)
+25C
10 12 14 16 18 20 22 24 26 28
FIGURE 33. VOS (V) DISTRIBUTION AT +25C, VRS+ = 12V, QUANTITY: 100
FIGURE 34. VOS vs VRS+
2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400
+100C
+125C
GAIN 20 VSENSE = 20mV, 100mV
250 200 150 100 VOS (V) 50 0 -50 -40C +25C +125C +100C
GAIN 20 VSENSE = 2mV, 20mV
VOS (V)
+25C -40C
-100 -150 -200 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -250 2 4 6
8
VRS+ (V)
10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 35. VOS vs VRS+
FIGURE 36. VOS vs VCC, VRS+ = 12V
13
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Typical Performance Curves
3000 +100C 2000 1000 VOS (V) 0 +25C GAIN 20 VSENSE = 2mV, 20mV
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
0.6 0.4 0.2 +25C -40C
-40C
ACCURACY (%)
0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 GAIN 20 VSENSE = 20mV, 100mV 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 VRS+ (V) +125C +100C
+125C
-1000 -2000 -3000
2
4
6
8
10 12 14 16 18 20 22 24 26 28 VCC (V)
-1.4
FIGURE 37. VOS vs VCC, VRS+ = 0.1V
FIGURE 38. GAIN ACCURACY vs VRS+ = 0V TO 28V
0.6 0.4 0.2 ACCURACY (%) 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4 0 0.2 0.4 +125C 0.6 -40C +100C +25C
GAIN 20 VSENSE = 20mV, 100mV ACCURACY (%)
0.8 1.0 1.2 VRS+ (V)
1.4
1.6
1.8
2.0
3.0 2.5 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -5.0
GAIN 20 VSENSE = 2mV, 20mV +100C +25C -40C
+125C
2
4
6
8
10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 39. GAIN ACCURACY vs VRS+ = 0V TO 2V
FIGURE 40. GAIN ACCURACY vs VCC, HIGH-SIDE
2 VOA PERCENT ACCURACY (%) 0 -2 ACCURACY (%) -4 -6 -8 -10 -12 -14 -16 -18 -20 2 4 6 8 +125C +100C +25C -40C
0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1.0 1 10 100 IOUT(A) +25C +125C +100C -40C 1m 10m GAIN 20
GAIN 20 VSENSE = 2mV, 20mV 10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 41. GAIN ACCURACY vs VCC, LOW-SIDE
FIGURE 42. NORMALIZED VOA vs IOUT
14
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Typical Performance Curves
45 35 25 GAIN (dB) VRS+ = 100mV VRS+ = 12V GAIN 20
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
-20 -40 -60 VOS (V) -80 -100 -120 -140 -50
GAIN 20 VSENSE = 20mV, 100mV VRS+ = 12V
15 5 -5 -15 V SENSE = 100mV A = 100 -25 V RL = 1M -35 10 100 VCC = 12V
1k 10k FREQUENCY (Hz)
100k
1M
-25
0
25 50 75 TEMPERATURE (C)
100
125
FIGURE 43. GAIN vs FREQUENCY VRS+ = 100mV/12V, VSENSE = 100mV, VOUT = 50mVP-P
FIGURE 44. VOS (V) vs TEMPERATURE
0.330 0.325 GAIN ACCURACY (%) 0.320 0.3150 0.310 0.305 0.300 0.295 0.290 -50 -25 0 25
GAIN 20 VSENSE = 20mV, 100mV VRS+ = 12V VOUT ERROR (%)
0.31 0.29 0.27 0.25 0.23 0.21 0.19 0.17
GAIN 20 VRS+ = 12V
50
75
100
125
0.15 -50
-25
0
TEMPERATURE (C)
25 50 75 TEMPERATURE (C)
100
125
FIGURE 45. GAIN ACCURACY (%) vs TEMPERATURE
FIGURE 46. VOUT ERROR (%) vs TEMPERATURE
26 GAIN 101 ADJ 24 Rf = 100k, Rg = 1k 22 VSENSE = 20mV, 100mV 20 18 16 14 12 10 8 6 4 2 0 -200 -160 -120 -80 -40 0 40 VOS (V)
80
120 160 200
2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400
GAIN 101 ADJ Rf = 100k, Rg = 1k VSENSE = 20mV, 100mV
VOS (V)
UNITS
+125C
+100C
-40C 0 2 4 6 8 VRS+ (V)
+25C
10 12 14 16 18 20 22 24 26 28
FIGURE 47. VOS (V) DISTRIBUTION AT +25C, VRS+ = 12V, QUANTITY: 100
FIGURE 48. VOS vs VRS+
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Typical Performance Curves
2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 -200 -400
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
250 200 150 100 VOS (V) 50 0 -50 -40C +25C GAIN 101 ADJ Rf = 100k, Rg = 1k VSENSE = 2mV, 20mV +100C
GAIN 101 ADJ Rf = 100k, Rg = 1k VSENSE = 20mV, 100mV +125C
VOS (V)
-40C
+25C +100C
-100 -150 -200
+125C 4 6 8 10 12 14 16 18 20 22 24 26 28 VCC (V)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
-250 2
VRS+ (V)
FIGURE 49. VOS vs VRS+
FIGURE 50. VOS vs VCC, HIGH-SIDE
3000 2000 1000 VOS (V) +100C +25C
GAIN 101 ADJ Rf = 100k, Rg = 1k VSENSE = 2mV, 20mV ACCURACY (%)
0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 +25C +100C +125C
GAIN 101 ADJ Rf = 100k, Rg = 1k VSENSE = 20mV, 100mV
-40C 0 +125C
-40C
-1000 -2000 -3000
2
4
6
8
10 12 14 16 18 20 22 24 26 28 VCC (V)
-1.4
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28 VRS+ (V)
FIGURE 51. VOS vs VCC, LOW-SIDE
FIGURE 52. GAIN ACCURACY vs VRS+ = 0V TO 28V
0.6 0.4 0.2 ACCURACY (%) 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4 0 0.2 0.4 0.6 +25C -40C +100C +125C
GAIN 101 ADJ Rf = 100k, Rg = 1k VSENSE = 20mV, 100mV ACCURACY (%)
0.8 1.0 1.2 VRS+ (V)
1.4
1.6
1.8
2.0
3.0 2.5 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 -3.5 -4.0 -4.5 -5.0
-40C
+100C
+25C
GAIN 101 ADJ Rf = 100k, Rg = 1k VSENSE = 2mV, 20mV
+125C
2
4
6
8
10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 53. GAIN ACCURACY vs VRS+ = 0V TO 2V
FIGURE 54. GAIN ACCURACY vs VCC, VRS+ = 12V
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ISL28006
Typical Performance Curves
2 0 -2 ACCURACY (%) -4 -6 -8 -10 -12 -14 -16 -18 -20 2 4 6 8 GAIN 101 ADJ Rf = 100k, Rg = 1k VSENSE = 2mV, 20mV +125C
Vcc = 12V, RL = 1M, unless otherwise specified. (Continued)
0.2 0.0 VOA PERCENT ACCURACY (%) -0.2 -0.4 -0.6 GAIN 101 ADJ R = 100k -0.8 Rf = 1k g -1.0 0.2 0.0 -0.2 -0.4 -0.6 GAIN 21 ADJ -0.8 Rf = 100k R = 5k -1.0 g 1 10
+25C -40C +100C +125C +25C -40C +100C +125C 100 IOUT(A) 1m 10m
+100C +25C -40C
10 12 14 16 18 20 22 24 26 28 VCC (V)
FIGURE 55. GAIN ACCURACY vs VCC, VRS+ = 0.1V
FIGURE 56. NORMALIZED VOA vs IOUT
45 40 35 30 GAIN (dB) 25 20 VRS+ = 0.1V GAIN = 21 VCC = 12V 15 VSENSE = 100mV VRS+ = 0.1V GAIN = 101 VRS+ = 12V GAIN = 51
VRS+ = 12V GAIN = 101
200 150 100 50 VOS (V) 0 -50 -100 -150 -200 -250 -300 -350 -50 GAIN = 21 GAIN = 101
VSENSE = 20mV, 100mV VRS+ = 12V GAIN = 21, 101 Rf = 100k Rg = 1k, 5k RL = 1M
VRS+ = 12V GAIN = 21
10 GAIN = 21, 51, 101 Rf = 100k 5 Rg = 1k, 2k, 5k VRS+ = 12V GAIN = 51 RL = 1M 0 100 1k 10k 100k FREQUENCY (Hz)
1M
-25
0
25 50 75 TEMPERATURE (C)
100
125
FIGURE 57. GAIN vs FREQUENCY VRS+ = 100mV/12V, VSENSE = 100mV, VOUT = 50mVP-P
FIGURE 58. VOS (V) vs TEMPERATURE
0.40 0.35 GAIN = 101 GAIN ACCURACY (%) VOUT ERROR (%) 0.30 0.25 0.20 0.15 VSENSE = 20mV, 100mV VRS+ = 12V GAIN = 21
0.6 0.5 0.4 0.3 0.2 0.1 VSENSE = 20mV, 100mV VRS+ = 12V GAIN = 21 GAIN = 101
0.10 GAIN = 21, 101 Rf = 100k 0.05 Rg = 1k, 5k RL = 1M 0 -50 -25 0
25
50
75
100
125
0 GAIN = 21, 101 Rf = 100k -0.1 Rg = 1k, 5k RL = 1M -0.2 -50 -25 0
25
50
75
100
125
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 59. GAIN ACCURACY (%) vs TEMPERATURE
FIGURE 60. VOUT ERROR (%) vs TEMPERATURE
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ISL28006
Test Circuits and Waveforms
VCC VR1 R1 + + VRS+ VSENSE GND 1M RL VOUT RS+ RSOUT + + VRS+ VSENSE R2 VR2 RS+ RSGND 1M RL VOUT OUT VCC
FIGURE 61. IS, VOS, VOA, CMRR, PSRR, GAIN ACCURACY
VCC RS+ VRS+ VRSPULSE GENERATOR RSGND 1M RL VOUT
FIGURE 62. INPUT BIAS CURRENT, LEAKAGE CURRENT
SIGNAL GENERATOR
VCC RS+
OUT VRS+ VSENSE
OUT GND 1M RL VOUT
RS-
FIGURE 63. ts, SATURATION RECOVERY TIME
VCC RS+ VRS+ RS-
FIGURE 64. GAIN vs FREQUENCY
OUT GND 1M
RL
VOUT
PULSE GENERATOR
FIGURE 65. SLEW RATE
Applications Information
Functional Description
The ISL28006-20, ISL28006-50 and ISL28006-100 are single supply, uni-directional current sense amplifiers with fixed gains of 20V/V, 50V/V and 100V/V respectively. The ISL28006-ADJ is single supply, uni-directional current sense amplifier with an adjustable gain via external resistors (see Figure 70). The ISL28006-ADJ is stable for gains of 20 and higher. The ISL28006 is a 2-stage amplifier. Figure 66 shows the active circuitry for high-side current sense applications where the sense voltage is between 1.35V to 28V. Figure 67 shows the active circuitry for ground sense applications where the sense voltage is between 0V to 1.35V. The first stage is a bi-level trans-conductance amp and level translator. The gm stage converts the low voltage drop (VSENSE) sensed across an external milli-ohm sense resistor, to a current (@ gm = 21.3A/V). The trans-conductance amplifier forces a current through R1 18
resulting to a voltage drop across R1 that is equal to the sense voltage (VSENSE). The current through R1 is mirrored across R5 creating a ground-referenced voltage at the input of the second amplifier equal to VSENSE. The second stage is responsible for the overall gain and frequency response performance of the device. The fixed gains (20, 50, 100) are set with internal resistors Rf and Rg. The variable gain (ADJ) has an additional FB pin and uses external gain resistors to set the gain of the output. For the fixed gain amps the only external component needed is a current sense resistor (typically 0.001 to 0.01, 1W to 2W). The transfer function for the fixed gain parts is given in Equation 1.
V OUT = GAIN x ( I S R S + V OS ) (EQ. 1)
The transfer function for the adjustable gain part is given in Equation 2.
RF V OUT = 1 + ------- ( I S R S + V OS ) R G (EQ. 2)
FN6548.3 May 27, 2010
ISL28006
The input gm stage derives its ~2.86A supply current from the input source through the RS+ terminal as long as the sensed voltage at the RS+ pin is >1.35V and the gmHI amplifier is selected. When the sense voltage at RS+ drops below the 1.35V threshold, the gmLO amplifier kicks in and the gmLO output current reverses, flowing out of the RS- pin.
VCC OPTIONAL FILTER CAPACITOR I = 2.86A VSENSE RS+ IS HIGH-SIDE SENSING VRS+ = 2V TO 28V VCC = 2V to 28V R2 OPTIONAL TRANSIENT PROTECTION
+ -
RS
VSENSE RS-
R1
gmHI
+ OUT Rf FB gmLO `VSENSE R5 Rg ADJ OPTION ONLY
1.35V R3
LOAD R4
IMIRROR GND
FIGURE 66. HIGH-SIDE CURRENT DETECTION
VCC OPTIONAL FILTER CAPACITOR I = 2.86A VSENSE RS+ IS + RSR2 + OPTIONAL TRANSIENT PROTECTION 1.35V R3 VCC OUT Rf FB gmLO R5 `VSENSE GND Rg ADJ OPTION ONLY RS VSENSE R1 gmHI LOW-SIDE SENSING VRS+= 0V TO 2V VCC = 2V TO 28V
LOAD R4
IMIRROR
FIGURE 67. LOW-SIDE CURRENT DETECTION
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FN6548.3 May 27, 2010
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Hysteretic Comparator
The input trans-conductance amps are under control of a hysteretic comparator operating from the incoming source voltage on the RS+ pin (Figure 66). The comparator monitors the voltage on RS+ and switches the sense amplifier from the low-side gm amp to the high-side gm amplifier whenever the input voltage at RS+ increases above the 1.35V threshold. Conversely, a decreasing voltage on the RS+ pin, causes the hysteric comparator to switch from the high-side gm amp to the low-side gm amp as the voltage decreases below 1.35V. It is that low-side sense gm amplifier that gives the ISL28006 the proprietary ability to sense current all the way to 0V. Negative voltages on the RS+ or RS- are beyond the sensing voltage range of this amplifier.
0.5 0.4 0.3 ACCURACY (%) 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 0 0.2 0.4 0.6 0.8 1.0 1.2 VRS+ (V) 1.4 1.6 1.8 2.0
protection for a 2V transient with the maximum of 20mA flowing through the input while adding only an additional 13V (worse case over-temperature) of VOS. Refer to Equation 3:
( ( R P x I RS- ) = ( 100 x 130nA ) = 13V ) (EQ. 3)
Switching applications can generate voltage spikes that can overdrive the amplifier input and drive the output of the amplifier into the rails, resulting in a long overload recover time. Capacitors CM and CD filter the common mode and differential voltage spikes.
Error Sources
There are 3 dominant error sources: gain error, input offset voltage error and Kelvin voltage error (see Figure 69). The gain error is dominated by the internal resistance matching tolerances. The remaining errors appear as sense voltage errors at the input to the amplifier. They are VOS of the amplifier and Kelvin voltage errors. If the transient protection resistor is added, an additional VOS error can result from the IxR voltage due to input bias current. The limiting resistor should only be added to the RS- input, due to the high-side gm amplifier (gmHI) sinking several micro amps of current through the RS+ pin.
Layout Guidelines
The Kelvin Connected Sense Resistor
The source of Kelvin voltage errors is illustrated in Figure 69. The resistance of 1/2 Oz copper is ~1m per square with a TC of ~3900ppm/C (0.39%/C). When you compare this unwanted parasitic resistance with the total 1m to 10m resistance of the sense resistor, it is easy to see why the sense connection must be chosen very carefully. For example, consider a maximum current of 20A through a 0.005 sense resistor, generating a VSENSE = 0.1 and a full scale output voltage of 10V (G = 100). Two side contacts of only 0.25 square per contact puts the VSENSE input about 0.5 x 1m away from the resistor end capacitor. If only 10A the 20A total current flows through the kelvin path to the resistor, you get an error voltage of 10mV (10A x 0.5sq x 0.001/sq. = 10mV) added to the 100mV sense voltage for a sense voltage error of 10% (0.110V-0.1)/0.1V)x 100.
Copper Trace 1/2 Oz COPPER TRACE 1m /SQ 30mO/Sq.
CURRENT OUT
FIGURE 68. GAIN ACCURACY vs VRS+ = 0V TO 2V
Typical Application Circuit
Figure 70 shows the basic application circuit and optional protection components for switched-load applications. For applications where the load and the power source is permanently connected, only an external sense resistor is needed. For applications where fast transients are caused by hot plugging the source or load, external protection components may be needed. The external current limiting resistor (RP) in Figure 70 may be required to limit the peak current through the internal ESD diodes to <20mA. This condition can occur in applications that experience high levels of in-rush current causing high peak voltages that can damage the internal ESD diodes. An RP resistor value of 100 will provide
CURRENT SENSE Resistor Current Sense RESISTOR
Non-uniform NON-UNIFORM CURRENT Flow Current FLOW CURRENTIn Current IN
1m TO 10m 1 to 10mO
Current Out
KELVINV S CONTACTS Kelvin V Contacts
S
PC BOARD PC Board
FIGURE 69. PC BOARD CURRENT SENSE KELVIN CONNECTION
20
FN6548.3 May 27, 2010
ISL28006
2.7VDC TO 28VDC
VCC I = 2.86A
RS+
(1m RS TO 0.1)
CD RS-
gmHI
FIXED GAIN OPTION ONLY
CM RP + 0.1VDC TO 28VDC LOAD 1.35V + OUT ADJ OPTION ONLY
FB gmLO
GND
FIGURE 70. TYPICAL APPLICATION CIRCUIT
Overall Accuracy (VOA %)
VOA is defined as the total output accuracy Referred-to-Output (RTO). The output accuracy contains all offset and gain errors, at a single output voltage. Equation 4 is used to calculate the % total output accuracy.
V OUT actual - V OUT exp ected V OA = 100 x ------------------------------------------------------------------------------------ V OUT exp ected (EQ. 4)
where: * PDMAXTOTAL is the sum of the maximum power dissipation of each amplifier in the package (PDMAX) * PDMAX for each amplifier can be calculated using Equation 7:
V OUTMAX PD MAX = V S x I qMAX + ( V S - V OUTMAX ) x --------------------------R
L
(EQ. 7)
where VOUT Actual = VSENSE x GAIN Example: Gain = 100, For 100mV VSENSE input we measure 10.1V. The overall accuracy (VOA) is 1% as shown in Equation 5.
10.1 - 10 V OA = 100 x ----------------------- = 1% 10 (EQ. 5)
where: * TMAX = Maximum ambient temperature * JA = Thermal resistance of the package * PDMAX = Maximum power dissipation of 1 amplifier * VCC = Total supply voltage * IqMAX = Maximum quiescent supply current of 1 amplifier * VOUTMAX = Maximum output voltage swing of the application RL = Load resistance
Power Dissipation
It is possible to exceed the +150C maximum junction temperatures under certain load and power supply conditions. It is therefore important to calculate the maximum junction temperature (TJMAX) for all applications to determine if power supply voltages, load conditions, or package type need to be modified to remain in the safe operating area. These parameters are related using Equation 6:
T JMAX = T MAX + JA xPD MAXTOTAL (EQ. 6)
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Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest Rev. DATE 5/12/10 4/8/10 4/7/10 REVISION FN6548.3 CHANGE Added Note 4 to Part Marking Column in "Ordering Information" on page 3. Corrected hyperlinks in Notes 1 and 3 in "Ordering Information" on page 3. Removed "Coming Soon" from evaluation boards in "Ordering Information" on page 3. Added "Related Literature*(see page 23)" on page 1 Updated Package Drawing Number in the "Ordering Information" on page 3 for the 20V, 50V and 100V options from MDP0038 to P50.64A. Revised package outline drawing from MDP0038 to P5.064A on page 24. MDP0038 package contained 2 packages for both the 5 and 6 Ld SOT-23. MDP0038 was obsoleted and the packages were separated and made into 2 separate package outline drawings; P5.064A and P6.064A. Changes to the 5 Ld SOT-23 were to move dimensions from table onto drawing, add land pattern and add JEDEC reference number. FN6548.2 Releasing adjustable gain option. Added adjustable block diagram (Page 2), Added adjustable gain limits to electrical spec table, added Figures 47 through 60, Added +85C curves to Figures 6 thru 14, 20 thru 28, 34 thru 42, and Figures 48 thru 56. Modified Figure 70. -Page 1: Edited last sentence of paragraph 2. Moved order of GAIN listings from 20, 50, 100 to 100, 50, 20 in the 3rd paragraph. Under Features ....removed "Low Input Offset Voltage 250V, max" Under Features .... moved order of parts listing from 20, 50, 100 (from top to bottom) to 100, 50, 20. -Page 3: Removed coming soon on ISL28006FH50Z and ISL28006FH20Z and changes the order or listing them to 100, 50, 20. -Page 5: VOA test. Under conditions column ...deleted 20mV to. It now reads ... Vsense = 100mV SR test. Under conditions column ..deleted what was there. It now reads ... Pulse on RS+pin, See Figure 51 -Page 6: ts test. Removed Gain = 100 and Gain = 100V/V in both description and conditions columns respectively. -Page 9: Added VRS+= 12V to Figures 16, 17, 18. -Page 11: Added VRS+= 12V to Figures 30, 31, 32. -Page 13 & 14: Added VRS+= 12V to Figures 44, 45, 46. -Page 14 Added Figure 51 and adjusted figure numbers to account for the added figure. -Figs 8, 26, and 40 change "HIGH SIDE" to "VRS = 12V", where RS is subscript. -Figs 9, 27, and 41 change "LOW SIDE" to "VRS = 0.1V", where RS is subscript. Initial Release
3/10/10
2/4/10
FN6548.1
12/14/09
FN6548.0
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Products
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, handheld products, and notebooks. Intersil's product families address power management and analog signal processing functions. Go to www.intersil.com/products for a complete list of Intersil product families. *For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device information page on intersil.com: ISL28006 To report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff FITs are available from our website at http://rel.intersil.com/reports/search.php
For additional products, see www.intersil.com/product_tree Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 23
FN6548.3 May 27, 2010
ISL28006
Package Outline Drawing
P5.064A
5 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE Rev 0, 2/10
1.90 D A 5 4 0-3 0.08-0.20
PIN 1 INDEX AREA 2.80 3 1.60 3 0.15 C D 2x 2 0.95 SEE DETAIL X B 0.40 0.05 3 END VIEW 0.20 C 2x 5 (0.60)
0.20 M C A-B D TOP VIEW 10 TYP (2 PLCS)
2.90
5
0.15 C A-B 2x C 1.14 0.15 0.10 C SEATING PLANE 1.45 MAX
H
(0.25) GAUGE PLANE
SIDE VIEW
0.05-0.15 DETAIL "X" (0.60)
0.450.1
4
(1.20) NOTES: (2.40) 1. 2. 3. 4. 5. 6. (0.95) (1.90) TYPICAL RECOMMENDED LAND PATTERN Dimensions are in millimeters. Dimensions in ( ) for Reference Only. Dimensioning and tolerancing conform to ASME Y14.5M-1994. Dimension is exclusive of mold flash, protrusions or gate burrs. Foot length is measured at reference to guage plane. This dimension is measured at Datum "H". Package conforms to JEDEC MO-178AA.
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FN6548.3 May 27, 2010
ISL28006
Package Outline Drawing
P6.064
6 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE Rev 4, 2/10
1.90 0.95 D A 6 5 4 0-8 0.08-0.22
2.80
3
1.60 +0.15/-0.10 3 (0.60)
PIN 1 INDEX AREA
1
2
3
0.20 C 2x 0.40 0.10 3 SEE DETAIL X END VIEW
B
0.20 M C A-B D TOP VIEW
10 TYP (2 PLCS) 2.90 0.10 3
1.15 +0.15/-0.25
C
1.45 MAX
(0.25) GAUGE PLANE
0.10 C 0.00-0.15 SIDE VIEW
SEATING PLANE DETAIL "X" 0.450.1 4
(0.95) (0.60)
(1.20)
NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. Dimensioning and tolerancing conform to ASME Y14.5M-1994. Dimension is exclusive of mold flash, protrusions or gate burrs. Foot length is measured at reference to guage plane. Package conforms to JEDEC MO-178AB.
(2.40)
2. 3. 4. 5.
TYPICAL RECOMMENDED LAND PATTERN
25
FN6548.3 May 27, 2010

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