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ISL60002
Data Sheet August 1, 2006 FN8082.7
Precision Low Power FGATM Voltage References
The ISL60002 FGATM voltage references are very high precision analog voltage references fabricated in Intersil's proprietary Floating Gate Analog technology and feature low supply voltage operation at ultra-low 400nA operating current. Additional features include guaranteed initial accuracy as low as 1.0mV, @ 20ppm/C temperature coefficient and long-term stability of <<10ppm/1kHrs. The initial accuracy and thermal stability performance of the ISL60002 family plus the low supply voltage and 400nA power consumption eliminates the need to compromise thermal stability for reduced power consumption making it an ideal companion to high resolution, low power data conversion systems.
Features
* Reference Voltages . . . 1.024V, 1.2V, 1.25V, 1.8V, 2.048V, 2.5V and 3.3V * Absolute Initial Accuracy Options. . . . . . 1.0mV, 2.5mV, and 5.0mV * Supply Voltage Range - ISL60002-10, -11, -12, -18, -20, -25 . . . . . . 2.7V to 5.5V - ISL60002-33 . . . . . . . . . . . . . . . . . . . . . . . . 3.5V to 5.5V * Ultra-Low Supply Current. . . . . . . . . . . . . . . . . . 350nA typ * Low 20ppm/C Temperature Coefficient * 10ppm/1kHrs. Long Term Stability * ISOURCE and ISINK = 7mA * ISOURCE and ISINK = 20mA for ISL60002-33 only * ESD Protection. . . . . . . . . . . . . 5kV (Human Body Model) * Standard 3 Ld SOT-23 Packaging * Operating Temperature Range - ISL60002-10, -11, -12, -18, -20, -25 . . . . -40C to +85C - ISL60002-33 . . . . . . . . . . . . . . . . . . . . . -40C to +105C * Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
* High Resolution A/Ds and D/As * Digital Meters * Bar Code Scanners * Mobile Communications * PDA's and Notebooks * Medical Systems
Typical Application
VIN = +3.0V 0.1F VIN 10F
VOUT 0.001F*
ISL60002 GND
REF IN Serial Bus ENABLE SCK SDAT 16 TO 24-BIT A/D CONVERTER
*Also see Figure 101 in Applications Information.
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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. FGA is a trademark of Intersil Corporation. Copyright Intersil Americas Inc. 2004-2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL60002 Table of Contents
Typical Application......................................................................................................................................................................... 1 Pinout ............................................................................................................................................................................................ 3 Pin Descriptions ............................................................................................................................................................................ 3 Ordering Information ..................................................................................................................................................................... 3 Absolute Maximum Ratings........................................................................................................................................................... 4 Electrical Specifications ISL60002-10, VOUT = 1.024V .................................................................................................................................................. 4 ISL60002-11, VOUT = 1.200V .................................................................................................................................................. 4 ISL60002-12, VOUT = 1.250V .................................................................................................................................................. 4 ISL60002-18, VOUT = 1.800V .................................................................................................................................................. 5 ISL60002-20, VOUT = 2.048V .................................................................................................................................................. 5 ISL60002-25, VOUT = 2.500V .................................................................................................................................................. 5 ISL60002-33, VOUT = 3.300V .................................................................................................................................................. 5 Common Electrical Specifications ISL60002 -10, -11, -12, -18, -20, and -25 ................................................................................................................................. 6 Typical Performance Characteristic Curves ISL60002, VOUT = 1.024V ....................................................................................................................................................... 7 ISL60002, VOUT = 1.20V ......................................................................................................................................................... 10 ISL60002, VOUT = 1.25V ......................................................................................................................................................... 13 ISL60002, VOUT = 1.8V ........................................................................................................................................................... 16 ISL60002, VOUT = 2.048V ....................................................................................................................................................... 19 ISL60002, VOUT = 2.50V ......................................................................................................................................................... 22 ISL60002, VOUT = 3.3V ........................................................................................................................................................... 25 Applications Information ................................................................................................................................................................ 28 Typical Application Circuits............................................................................................................................................................ 30 Packaging Information................................................................................................................................................................... 31
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FN8082.7 August 1, 2006
ISL60002 Pinout
ISL60002 (3 LD SOT-23) TOP VIEW
VIN 1
Pin Descriptions
PIN NAME GND VIN
3 VOUT 2 GND
DESCRIPTION Ground Connection Power Supply Input Connection Voltage Reference Output Connection
VOUT
Ordering Information
PART NUMBER ISL60002BIH310Z-TK (Note) ISL60002CIH310Z-TK (Note) ISL60002DIH310Z-TK (Note) ISL60002BIH311Z-TK (Note) ISL60002CIH311Z-TK (Note) ISL60002DIH311Z-TK (Note) ISL60002BIH312-TK ISL60002BIH312Z-TK (Note) ISL60002CIH312-TK ISL60002CIH312Z-TK (Note) ISL60002DIH312-TK ISL60002DIH312Z-TK (Note) ISL60002BIH318Z-TK (Note) ISL60002CIH318Z-TK (Note) ISL60002DIH318Z-TK (Note) ISL60002BIH320Z-TK (Note) ISL60002CIH320Z-TK (Note) ISL60002DIH320Z-TK (Note) ISL60002BIH325-TK ISL60002BIH325Z-TK (Note) ISL60002CIH325-TK ISL60002CIH325Z-TK (Note) ISL60002DIH325-TK ISL60002DIH325Z-TK (Note) ISL60002BAH333Z-TK (Note) ISL60002CAH333Z-TK (Note) ISL60002DAH333Z-TK (Note) *Add "TK" suffix for tape and reel. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are 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. PART MARKING DFB DFC DFD APM AOH AOY AIL AOM AIN AOS AIP APA DEO DEP DEQ DEY DEZ DFA AIK AON AIM AOT AIO APB AOP AOU APC VOUT (V) 1.024 1.024 1.024 1.200 1.200 1.200 1.250 1.250 1.250 1.250 1.250 1.250 1.800 1.800 1.800 2.048 2.048 2.048 2.500 2.500 2.500 2.500 2.500 2.500V 3.300V 3.300V 3.300V GRADE 1.0mV, 20ppm/C 2.5mV, 20ppm/C 5.0mV, 20ppm/C 1.0mV, 20ppm/C 2.5mV, 20ppm/C 5.0mV, 20ppm/C 1.0mV, 20ppm/C 1.0mV, 20ppm/C 2.5mV, 20ppm/C 2.5mV, 20ppm/C 5.0mV, 20ppm/C 5.0mV, 20ppm/C 1.0mV, 20ppm/C 2.5mV, 20ppm/C 5.0mV, 20ppm/C 1.0mV, 20ppm/C 2.5mV, 20ppm/C 5.0mV, 20ppm/C 1.0mV, 20ppm/C 1.0mV, 20ppm/C 2.5mV, 20ppm/C 2.5mV, 20ppm/C 5.0mV, 20ppm/C 5.0mV, 20ppm/C 1.0mV, 20ppm/C 2.5mV, 20ppm/C 5.0mV, 20ppm/C TEMP. RANGE (C) -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +105 -40 to +105 -40 to +105 PACKAGE 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free) 3 Ld SOT-23 (Pb-free)
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FN8082.7 August 1, 2006
ISL60002
Absolute Maximum Ratings
Storage Temperature Range . . . . . . . . . . . . . . . . . -65C to + 150C Max Voltage VIN to Gnd. . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6.5V Max Voltage VOUT to Gnd*: ISL60002, VOUT = 1.25V. . . . . . . . . . . . . . . . . . . . . -0.5V to +2.25V ISL60002, VOUT = 2.50V. . . . . . . . . . . . . . . . . . . . . -0.5V to +3.50V Voltage on "DNC" pins . . . . No connections permitted to these pins. Lead Temperature, Soldering*(Note 5) . . . . . . . . . . . . . . . . . +225C *Maximum duration = 10s
Recommended Operating Conditions
Temperature Range (Industrial) . . . . . . . . . . . . . . . . .-40C to +85C Temperature Range (3.3V version) . . . . . . . . . . . . .-40C to +105C
ESD Ratings
MIL-STD-883, Method 3014. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5kV
CAUTION: Absolute Maximum Ratings are limits which may result in impaired reliability and/or permanent damage to the device. These are stress ratings provided for information only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification are not implied. For guaranteed specifications and test conditions, see Electrical Specifications. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions.
Electrical Specifications ISL60002-10, VOUT = 1.024V (Additional specifications on page 6, "Common Electrical Specifications")
Operating Conditions: VIN = 3.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +85C, unless otherwise specified. SYMBOL VOUT VOA PARAMETER Output Voltage VOUT Accuracy (Note 5) TA = +25C ISL60002B10 ISL60002C10 ISL60002D10 VIN Input Voltage Range -1.0 -2.5 -5.0 2.7 +1.0 +2.5 +5.0 5.5 mV mV mV V CONDITIONS MIN TYP 1.024 MAX UNITS V
Electrical Specifications ISL60002-11, VOUT = 1.200V (Additional specifications on page 6, "Common Electrical Specifications")
Operating Conditions: VIN = 3.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +85C, unless otherwise specified. SYMBOL VOUT VOA PARAMETER Output Voltage VOUT Accuracy (Note 5) TA = +25C ISL60002B11 ISL60002C11 ISL60002D11 VIN Input Voltage Range -1.0 -2.5 -5.0 2.7 +1.0 +2.5 +5.0 5.5 mV mV mV V CONDITIONS MIN TYP 1.200 MAX UNITS V
Electrical Specifications ISL60002-12, VOUT = 1.250V (Additional specifications on page 6, "Common Electrical Specifications") Operating Conditions: VIN = 3.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +85C, unless otherwise specified.
SYMBOL VOUT VOA PARAMETER Output Voltage VOUT Accuracy (Note 5) TA = +25C ISL60002B12 ISL60002C12 ISL60002D12 VIN Input Voltage Range -1.0 -2.5 -5.0 2.7 +1.0 +2.5 +5.0 5.5 mV mV mV V CONDITIONS MIN TYP 1.250 MAX UNITS V
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ISL60002
Electrical Specifications ISL60002-18, VOUT = 1.800V (Additional specifications on page 6, "Common Electrical Specifications") Operating Conditions: VIN = 3.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +85C, unless otherwise specified.
SYMBOL VOUT VOA PARAMETER Output Voltage VOUT Accuracy (Note 5) TA = +25C ISL60002B18 ISL60002C18 ISL60002D18 VIN Input Voltage Range -1.0 -2.5 -5.0 2.7 +1.0 +2.5 +5.0 5.5 mV mV mV V CONDITIONS MIN TYP 1.800 MAX UNITS V
Electrical Specifications ISL60002-20, VOUT = 2.048V (Additional specifications on page 6, "Common Electrical Specifications") Operating Conditions: VIN = 3.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +85C, unless otherwise specified.
SYMBOL VOUT VOA PARAMETER Output Voltage VOUT Accuracy (Note 5) TA = +25C ISL60002B20 ISL60002C20 ISL60002D20 VIN Input Voltage Range -1.0 -2.5 -5.0 2.7 +1.0 +2.5 +5.0 5.5 mV mV mV V CONDITIONS MIN TYP 2.048 MAX UNITS V
Electrical Specifications ISL60002-25, VOUT = 2.500V (Additional specifications on page 6, "Common Electrical Specifications") Operating Conditions: VIN = 3.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +85C, unless otherwise specified.
SYMBOL VOUT VOA PARAMETER Output Voltage VOUT Accuracy (Note 5) TA = +25C ISL60002B25 ISL60002C25 ISL60002D25 VIN Input Voltage Range -1.0 -2.5 -5.0 2.7 +1.0 +2.5 +5.0 5.5 mV mV mV V CONDITIONS MIN TYP 2.500 MAX UNITS V
Electrical Specifications ISL60002-33, VOUT = 3.300V
Operating Conditions: VIN = 5.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +105C, unless otherwise specified. SYMBOL VOUT VOA PARAMETER Output Voltage VOUT Accuracy (Note 5) TA = +25C ISL60002B33 ISL60002C33 ISL60002D33 TC VOUT VIN IIN VOUT/VIN VOUT/IOUT Output Voltage Temperature Coefficient (Note 1) Input Voltage Range Supply Current Line Regulation Load Regulation +3.5V VIN +5.5V 0mA ISOURCE 20mA -20mA ISINK 0mA 3.5 350 80 25 50 -1.0 -2.5 -5.0 1.0 2.5 5.0 20 5.5 700 200 100 150 mV mV mV ppm/C V nA V/V V/mA V/mA CONDITIONS MIN TYP 3.300 MAX UNITS V
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ISL60002
Electrical Specifications ISL60002-33, VOUT = 3.300V (Continued) Operating Conditions: VIN = 5.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +105C, unless otherwise specified.
SYMBOL VOUT/t VOUT/TA ISC VN PARAMETER Long Term Stability (Note 4) Thermal Hysteresis (Note 2) Short Circuit Current (Note 3) Output Voltage Noise TA = +25C TA = +145C TA = +25C 0.1Hz f 10Hz CONDITIONS MIN TYP 10 100 50 30 80 MAX UNITS ppm/1 kHrs ppm mA VP-P
Common Electrical Specifications ISL60002 -10, -11, -12, -18, -20, and -25
Operating Conditions: VIN = 3.0V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +85C, unless otherwise specified SYMBOL TC VOUT IIN VOUT/VIN VOUT/IOUT PARAMETER Output Voltage Temperature Coefficient (Note 1) Supply Current Line Regulation Load Regulation +2.7V VIN +5.5V 0mA ISOURCE 7mA -7mA ISINK 0mA VOUT/t VOUT/TA ISC VN NOTES: 1. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in VOUT is divided by the temperature range: (-40C to +85C = +125C, or -40C to +105C = +145C for the ISL60002-33). 2. Thermal Hysteresis is the change in VOUT measured @ TA = +25C after temperature cycling over a specified range, TA, VOUT is read initially at TA = +25C for the device under test. The device is temperature cycled and a second VOUT measurement is taken at +25C. The difference between the initial VOUT reading and the second VOUT reading is then expressed in ppm. For TA = +125C, the device under is cycled from +25C to +85C to -40C to +25C, and for TA = +145C, the device under is cycled from +25C to +105C to -40C to +25C 3. Guaranteed by device characterization and/or correlation to other device tests. 4. FGATM voltage reference long term drift is a logarithmic characteristic. Changes that occur after the first few hundred hours of operation are significantly smaller with time, asymptotically approaching zero beyond 2000 hours. Because of this decreasing characteristic, long-term drift is specified in ppm/1kHr. 5. Pb-free manufacturing can result in solder reflow temperatures exceeding the +225C absolute maximum. Exposing the device to this reflow temperature will not damage it or cause any functional issues and the device will operate normally. The high reflow temperature may result in a permanent shift in output voltage of 500V to 1.0mV depending on the temperature and exposure time. If possible, using a reduced reflow temperature in production will result in the best possible output voltage accuracy. Long Term Stability (Note 4) Thermal Hysteresis (Note 2) Short Circuit Current (Note 3) Output Voltage Noise TA = +25C TA = +125C TA = +25C 0.1Hz f 10Hz 350 80 25 50 10 100 50 30 80 CONDITIONS MIN TYP MAX 20 900 250 100 150 UNITS ppm/C nA V/V V/mA V/mA ppm/1 kHrs ppm mA VP-P
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FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.024V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
700 600 500 400 300 200 100 0 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) 403nA IIN (nA) 327nA 224nA 500 450 400 350 300 250 200 150 100 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) -40C +25C +85C
IIN (nA)
FIGURE 1. IIN vs VIN (3 REPRESENTATIVE UNITS)
FIGURE 2. IIN vs VIN OVER TEMPERATURE
(NORMALIZED TO 1.024V AT VIN = 3V)
1.0244 VO (V) (NORMALIZED TO VIN = 3.0V) 1.0243 1.0242 1.0241 1.024 1.0239 224nA 1.0238 1.0237 1.0236 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) 327nA 403nA
150 125 100 75 50 25 0 -25 -50 -75 -100 -125 -150 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) +85C +25C -40C
VOUT (V)
FIGURE 3. LINE REGULATION (3 REPRESENTATIVE UNITS)
FIGURE 4. LINE REGULATION OVER TEMPERATURE
1.025 1.0248 1.0246 1.02442 VOUT (V) 1.0242 1.024 1.0238 1.0236 1.0234 1.0232 1.023 -40 -15 10 35 60 85 UNIT 1 UNIT 3 UNIT 2
TEMPERATURE (C)
FIGURE 5. VOUT vs TEMPERATURE NORMALIZED to +25C
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ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.024V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified (Continued)
CL = 500pF V = 0.3V
CL = 0pF V = 0.3V
50mV/DIV
V = -0.3V
50mV/DIV
V = -0.3V
1ms/DIV
1ms/DIV
FIGURE 6. LINE TRANSIENT RESPONSE
FIGURE 7. NO LOAD LINE TRANSIENT RESPONSE
0.6 0.5 0.4 0.3 0.2 VOUT (mV) 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -7 -6 -5 SINKING -4 -3 -2 -1 0 1 2 OUTPUT CURRENT 3 4 567 SOURCING -40C +25C +85C
FIGURE 8. LOAD REGULATION
IL = 7mA
IL = 50A 500mV/DIV 500mV/DIV
IL = -50A
IL = -7mA 2ms/DIV 1ms/DIV
FIGURE 9. LOAD TRANSIENT RESPONSE
FIGURE 10. LOAD TRANSIENT RESPONSE
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FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.024V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
3.2 2.8 2.4 VIN AND VOUT (V) 2 1.6 1.2 0.8 0.4 0 0 2 327nA 224nA 4 6 TIME (ms) 8 10 12 402nA VIN VIN AND VOUT (V) 3.2 2.8 2.4 2 1.6 1.2 0.8 0.4 0 0 2 4 6 TIME (ms) 8 10 12 327nA VIN
(Continued)
FIGURE 11. TURN-ON TIME (+25C)
FIGURE 12. TURN-ON TIME (+25C)
160 140 120 ZOUT () 100 80 60 40 20 0 1 10
100nF LOAD
NO LOAD
1nF LOAD
10nF LOAD
100 1k FREQUENCY (Hz)
10k
100k
FIGURE 13. ZOUT vs FREQUENCY
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ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.20V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
700 600 500 400 IIN (nA) 300 200 100 0 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V)
450nA
500 450 400 350 IIN (nA) 300 250 200 150 100 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V)
+85C +25C -40C
340nA 270nA
FIGURE 14. IIN vs VIN (3 REPRESENTATIVE UNITS)
FIGURE 15. IIN vs VIN OVER TEMPERATURE
1.2006 UNIT 2 1.2004 1.2002 VOUT (V) 1.2 UNIT 3 UNIT 1
1.1998 1.1996 1.1994 -40
-15
10
35
60
85
TEMPERATURE (C)
FIGURE 16. VOUT vs TEMPERATURE NORMALIZED to +25C
1.2001 VOUT (V) (NORMAILIZED TO 1.25V at VIN = 3V) 1.20008 VO (V) (NORMALIZED TO VIN = 3.0V) 1.20006 1.20004 1.20002 1.2 1.19998 1.19996 1.19994 1.19992 1.1999 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) 450nA 270nA 340nA
150 125 100 75 50 25 0 -25 -50 -75 -100 -125 -150 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN
+85C +25C
-40C
FIGURE 17. LINE REGULATION (3 REPRESENTATIVE UNITS)
FIGURE 18. LINE REGULATION OVER TEMPERATURE
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ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.20V (Continued)
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
CL = 0nF
CL = 500pF
100mV/DIV
VIN = -0.30V
VIN = 0.30V
100mV/DIV
VIN = -0.30V
VIN = 0.30V
1ms/DIV FIGURE 19. LINE TRANSIENT RESPONSE
1ms/DIV FIGURE 20. LINE TRANSIENT RESPONSE
0 -10 -20 -30 PSRR (dB) VOUT (mV) -40 -50 -60 -70 -80 -90 -100 1 10 100 1k 10k 100k 1M 1nF LOAD 10nF LOAD 100nF LOAD NO LOAD
0.60 0.50 0.40 0.30 0.20 0.10 0.00 -0.10 -0.20 -0.30 -0.40 -0.50 -0.60 -7 FREQUENCY (Hz) -6 -5 -4 SINKING -3 -2 -1 0 1 2 3 OUTPUT CURRENT (mA) 4567 SOURCING -40C 25C 85C
FIGURE 21. PSRR vs CAPACITIVE LOAD
FIGURE 22. LOAD REGULATION
IL = -50A
IL = 50A IL = -7mA 200s/DIV 500s/DIV FIGURE 24. LOAD TRANSIENT RESPONSE IL = 7mA
FIGURE 23. LOAD TRANSIENT RESPONSE
11
200mV/DIV
50mV/DIV
FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.20V (Continued)
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
3.2 2.8 2.4 VIN and VOUT (V) 2 1.6 1.2 340nA 0.8 0.4 0 0 2 4 6 TIME (ms) 8 10 12 40 20 0 1 10 100 1k FREQUENCY (Hz) 10k 100k
100nF LOAD
160 VIN 140 120 ZOUT () 100 80 60
NO LOAD
1nF LOAD
10nF LOAD
FIGURE 25. TURN-ON TIME (+25C)
FIGURE 26. ZOUT vs FREQUENCY
10V/DIV
10s/DIV
FIGURE 27. VOUT NOISE
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ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.25V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
700 650 600 420 550 IIN (nA) IIN (nA) 500 450 400 350 300 250 200 2.5 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5 UNIT 1 (260nA) 340 320 300 2.5 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5 UNIT 2 (380nA) 400 380 -40C 360 +25C UNIT 3 (570nA) 460 440 +85C
FIGURE 28. IIN vs VIN (3 REPRESENTATIVE UNITS)
FIGURE 29. IIN vs VIN OVER TEMPERATURE
1.2510 1.2508 1.2506 1.2504 VOUT (V) UNIT 3 UNIT 2
1.2502 UNIT 1 1.25 1.2498 1.2496 1.2494 1.2492 1.249 -40 -15 10 35 60 85
TEMPERATURE (C)
FIGURE 30. VOUT vs TEMPERATURE NORMALIZED TO +25C
1.2503 NORMAILIZED TO 1.25V AT VIN = 3V VO (V) (NORMALIZED TO VIN = 3.0V) 1.25025 1.2502 1.25015 1.2501 1.25005 1.25 1.24995 1.2499 2.5 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5 UNIT 2 (380nA) UNIT 1 (260nA) UNIT (570nA) UNIT 33(570nA)
50
25 -40C +25C +85C 0
VOUT (V)
-25 2.5 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5
FIGURE 31. LINE REGULATION (3 REPRESENTATIVE UNITS)
FIGURE 32. LINE REGULATION OVER TEMPERATURE
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FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.25V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified CL = 1nF (Continued)
CL = 0nF
100mV/DIV
100mV/DIV
VIN = -0.30V
VIN = 0.30V
VIN = -0.30V
VIN = 0.30V
1ms/DIV FIGURE 33. LINE TRANSIENT RESPONSE
1ms/DIV FIGURE 34. LINE TRANSIENT RESPONSE
0 -10 -20 PSRR (dB) -30 1nF LOAD -40 -50 10nF LOAD -60 100nF LOAD -70 -80 1 10 100 1k 10k 100k 1M VOUT (mV) NO LOAD
0.30
0.20 +85C +25C 0.10 -40C
0.00
-0.10 -7
FREQUENCY (Hz)
-6 -5 -4 SINKING
-3
-2
-1
0
1
2
3
OUTPUT CURRENT (mA)
4567 SOURCING
FIGURE 35. PSRR vs CAPACITIVE LOAD
FIGURE 36. LOAD REGULATION
50mV/DIV
IL = -50A
IL = 50A
200mV/DIV
IL = -7mA
100s/DIV
IL = 7mA 500s/DIV
FIGURE 37. LOAD TRANSIENT RESPONSE
FIGURE 38. LOAD TRANSIENT RESPONSE
14
FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 1.25V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
3.0 VIN 2.5 VIN AND VOUT (V) 2.0 ZOUT () 1.5 1.0 380nA 0.5 0 -1 180 NO LOAD 160 140 120 100 80 60 40 20 0 1 3 5 TIME (ms) 7 9 11 1 10 100 1k 10k 1M FREQUENCY (Hz) 100nF LOAD 10nF LOAD 1nF LOAD
(Continued)
FIGURE 39. TURN-ON TIME (+25C)
FIGURE 40. ZOUT vs FREQUENCY
10V/DIV
10s/DIV
FIGURE 41. VOUT NOISE
15
FN8082.7 August 1, 2006
ISL60002 Typical Performance Curves ISL60002, VOUT = 1.8V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
700 600 500 400nA IIN (nA) 330nA 240nA IIN (nA) 400 300 200 100 0 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) 500 450 400 350 300 250 200 150 100 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) -40C +25C +85C
FIGURE 42. IIN vs VIN (3 REPRESENTATIVE UNITS)
FIGURE 43. IIN vs VIN OVER TEMPERATURE
1.8002 VOUT (V) (NORMALIZED TO 1.80V AT VIN = 3V) VO (V) (NORMALIZED TO VIN = 3.0V) 1.80015 1.8001 1.80005 1.8 1.79995 1.7999 1.79985 1.7998 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) 240nA 330nA 400nA
150 125 100 75 50 25 0 -25 -50 -75 -100 -125 -150 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) +25C +85C -40C
FIGURE 44. LINE REGULATION (3 REPRESENTATIVE UNITS)
FIGURE 45. LINE REGULATION OVER TEMPERATURE
CL = 500pF V = 0.3V
CL = 500pF V = 0.3V
50mV/DIV
V = -0.3V
50mV/DIV
V = -0.3V
1ms/DIV
1ms/DIV
FIGURE 46. LINE TRANSIENT RESPONSE
FIGURE 47. NO LOAD LINE TRANSIENT RESPONSE
16
FN8082.7 August 1, 2006
ISL60002 Typical Performance Curves ISL60002, VOUT = 1.8V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
0 -10 -20 -30 PSRR (dB) 0.2 VOUT (mV) -40 -50 -60 -70 -80 -90 -100 10nF LOAD 100nF LOAD -0.6 -0.8 1nF LOAD 0 -0.2 -0.4 -40C NO LOAD 0.4 0.8 0.6 +85C +25C
(Continued)
1
10
100
1k
10k
100k
1G
FREQUENCY (Hz)
-10 -8 -6 SINKING
-4
-2 0 2 4 OUTPUT CURRENT
6
8 10 SOURCING
FIGURE 48. PSRR vs CAPACITIVE LOAD
FIGURE 49. LOAD REGULATION
IL = 10mA
IL = 50A 500mV/DIV 500mV/DIV
IL = -50A
IL = -10mA 2ms/DIV 1ms/DIV
FIGURE 50. LOAD TRANSIENT RESPONSE
FIGURE 51. LOAD TRANSIENT RESPONSE
3.2 2.8 VIN AND VOUT (V) 2.4 2 1.6 1.2 240nA 0.8 0.4 0 0 2 4 6 TIME (ms) 8 10 12 400nA 330nA
VIN
3.2 2.8 VIN AND VOUT (V) 2.4 2 1.6 1.2 0.8 0.4 0 0 2 4 6 TIME (ms) 8 10 12 330nA
VIN
FIGURE 52. TURN-ON TIME (+25C)
FIGURE 53. TURN-ON TIME (+25C)
17
FN8082.7 August 1, 2006
ISL60002 Typical Performance Curves ISL60002, VOUT = 1.8V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
160 1nF LOAD 140 120 ZOUT () 100 100nF LOAD 80 60 40 20 0 1 10 100 1k 10k 100k 10nF LOAD 5mV/DIV NO LOAD
(Continued)
FREQUENCY (Hz)
1ms/DIV
FIGURE 54. ZOUT vs FREQUENCY
FIGURE 55. VOUT NOISE
18
FN8082.7 August 1, 2006
ISL60002 Typical Performance Curves ISL60002, VOUT = 2.048V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
700 600 500 IIN (nA) 400 300 200 100 0 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) 405nA 350 325nA 228nA IIN (nA) 300 250 200 150 100 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) -40C 500 450 400 +25C +85C
FIGURE 56. IIN vs VIN (3 REPRESENTATIVE UNITS)
FIGURE 57. IIN vs VIN OVER TEMPERATURE
VOUT (V) (NORMALIZED TO 2.048V AT VIN = 3V)
2.0484 VO (V) NORMALIZED TO VIN = 3.0V) 2.0483 2.0482 2.0481 2.048 2.0479 2.0478 2.0477 2.0476 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) 405nA 228nA 325nA
200 175 -40C 150 125 100 +25C 75 50 +85C 25 0 -25 -50 -75 -100 -125 -150 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V)
FIGURE 58. LINE REGULATION (3 REPRESENTATIVE UNITS)
FIGURE 59. LINE REGULATION OVER TEMPERATURE
2.0484 2.0483 2.0482 2.0481 VOUT (V) 2.048 2.0479 2.0478 2.0477 2.0476 2.0475 2.0474 -40 -15 10 35 60 85 UNIT 3 UNIT 1 UNIT 2
TEMPERATURE (C)
FIGURE 60. VOUT vs TEMPERATURE NORMALIZED to +25C
19
FN8082.7 August 1, 2006
ISL60002 Typical Performance Curves ISL60002, VOUT = 2.048V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified (Continued)
CL = 500pF V = 0.3V
CL = 0pF V = 0.3V
50mV/DIV
V = -0.3V
50mV/DIV
V = -0.3V
1ms/DIV
1ms/DIV
FIGURE 61. LINE TRANSIENT RESPONSE
FIGURE 62. NO LOAD LINE TRANSIENT RESPONSE
1.4 1.2 1 0.8 VOUT (mV) 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -7 -6 -5 SINKING -4 -3 -2 -1 0 1 2 3 OUTPUT CURRENT 4 5 6 7 SOURCING +85C +25C
-40C
FIGURE 63. LOAD REGULATION
IL = 7mA IL = 50A 500mV/DIV 500mV/DIV
IL = -50A
IL = -7mA
2ms/DIV
2ms/DIV
FIGURE 64. LOAD TRANSIENT RESPONSE
FIGURE 65. LOAD TRANSIENT RESPONSE
20
FN8082.7 August 1, 2006
ISL60002 Typical Performance Curves ISL60002, VOUT = 2.048V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
3.2 2.8 2.4 VIN AND VOUT (V) 2 405nA 1.6 228nA 1.2 0.8 0.4 0 0 2 4 6 TIME (ms) 8 10 12 325nA VIN AND VOUT (V) VIN 3.2 2.8 2.4 2 1.6 1.2 0.8 0.4 0 0 2 4 6 TIME (ms) 8 10 12 325nA VIN
(Continued)
FIGURE 66. TURN-ON TIME (+25C)
FIGURE 67. TURN-ON TIME (+25C)
160 NO LOAD 140 120 ZOUT () 100 80 60 40 20 0 1 10 100 1k FREQUENCY (Hz) 10k 100k 100nF LOAD 10nF LOAD 1nF LOAD
FIGURE 68. ZOUT vs FREQUENCY
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FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 2.50V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
600 550 500 UNIT 3 (570nA) 450 IIN (nA) 400 350 300 250 200 2.5 3.0 UNIT 1 (260nA) UNIT 2 (380nA) IIN (nA) 400 380 -40C 360 340 320 4.5 5.0 5.5 300 2.5 3.0 3.5 4.0 VIN (V) 4.5 5.0 5.5 460 440 420 +85C +25C
3.5
4.0 VIN (V)
FIGURE 69. IIN vs VIN (3 REPRESENTATIVE UNITS)
FIGURE 70. IIN vs VIN OVER TEMPERATURE
2.502 2.5015 2.501 VOUT (V) 2.5005 2.5 2.4995 2.499 2.4985 -40
UNIT 2
UNIT 1
UNIT 3
-15
10
35
60
85
TEMPERATURE (C)
FIGURE 71. VOUT vs TEMPERATURE NORMALIZED TO +25C
2.50016 NORMAILIZED TO 2.50V AT VIN = 3V 2.50012 2.50008 2.50004 UNIT 3 2.50000 2.49996 2.49992 2.5 UNIT 2 (NORMALIZED TO VIN = 3.0V)
200 150 +25C 100 +85C 50 0 -50
-40C
UNIT 1 VO (V)
VOUT (V)
3.0
3.5
4.0 VIN (V)
4.5
5.0
5.5
-100 2.5
3.0
3.5
4.0 VIN (V)
4.5
5.0
5.5
FIGURE 72. LINE REGULATION (3 REPRESENTATIVE UNITS)
FIGURE 73. LINE REGULATION OVER TEMPERATURE
22
FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 2.50V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified (Continued)
CL = 0nF
CL = 1nF
100mV/DIV
VIN = -0.30V
VIN = 0.30V
100mV/DIV
VIN = -0.30V
VIN = 0.30V
1ms/DIV
1ms/DIV
FIGURE 74. LINE TRANSIENT RESPONSE
FIGURE 75. LINE TRANSIENT RESPONSE
0 -10 -20 PSRR (dB) -30 -40 -50 10nF LOAD -60 100nF LOAD -70 -80 1 10 100 1k 10k 100k 1M 1nF LOAD VOUT (mV) NO LOAD
0.20
+85C 0.10 +25C -40C 0.00
-0.10 -7
FREQUENCY (Hz)
-6 -5 -4 SINKING
-3
-2
-1
0
1
2
3
OUTPUT CURRENT (mA)
4567 SOURCING
FIGURE 76. PSRR vs CAPACITIVE LOAD
FIGURE 77. LOAD REGULATION
IL = -50A
IL = 50A IL = -7mA 200s/DIV 500s/DIV IL = 7mA
FIGURE 78. LOAD TRANSIENT RESPONSE
200mV/DIV
50mV/DIV
FIGURE 79. LOAD TRANSIENT RESPONSE
23
FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 2.50V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
3.5 3.0 IIN = 380nA VIN AND VOUT (V) 2.5 ZOUT () 2.0 1.5 1.0 50 0.5 0 -1 0 1 10 100 1k 10k 100k FREQUENCY (Hz) 100nF LOAD 150 10nF LOAD 100
(Continued)
200 1nF LOAD NO LOAD
1
3
5 TIME (ms)
7
9
11
FIGURE 80. TURN-ON TIME (+25C)
FIGURE 81. ZOUT vs FREQUENCY
10V/DIV
10s/DIV
FIGURE 82. VOUT NOISE
24
FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 3.3V
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
600 550 500 450 IIN (nA) 400 350 300 250 200 150 100 3.5 3.7 3.9 4.1 4.3 4.5 VIN (V) 4.7 4.9 5.1 5.3 5.5 240nA 450nA IIN (nA)
400 380 85C 360 340 320 300 280 260 3.5 25C -40C
360nA
3.7
3.9
4.1
4.3
4.5 4.7 VIN (V)
4.9
5.1
5.3
5.5
FIGURE 83. IIN vs VIN (3 REPRESENTATIVE UNITS)
FIGURE 84. IIN vs VIN OVER TEMPERATURE
3.3008 3.3006 3.3004 UNIT 3 3.3002 VOUT (V) 3.3 3.2998 3.2996 3.2994 3.2992 3.299 -40 -15 10 35 60 85 UNIT 2 UNIT 1
TEMPERATURE (C)
FIGURE 85. VOUT vs TEMPERATURE NORMALIZED TO +25C
3.3002 (NORMAILIZED TO 3.30V AT VIN =5V) 3.30015 VO (V) (NORMALIZED TO VIN = 5.0V) 3.3001 3.30005 450nA 3.3 3.29995 3.2999 3.29985 3.2998 3.29975 3.2997 3.5 3.7 3.9 4.1 4.3 4.5 VIN (V) 4.7 4.9 5.1 5.3 5.5 360nA 240nA
150 125 100 75 50 25 0 -25 -50 -75 -100 -125 -150 3.5 3.7 3.9 4.1 4.3 4.5 4.7 VIN (V) 4.9 5.1 5.3 5.5 +25C +85C -40C
VOUT (V)
FIGURE 86. LINE REGULATION (3 REPRESENTATIVE UNITS)
FIGURE 87. LINE REGULATION OVER TEMPERATURE
25
FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 3.3V (Continued)
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
CL = 0nF
CL = 1nF
100mV/DIV
VIN = -0.30V
VIN = 0.30V
100mV/DIV
VIN = -0.30V
VIN = 0.30V
1ms/DIV FIGURE 88. LINE TRANSIENT RESPONSE
1ms/DIV FIGURE 89. LINE TRANSIENT RESPONSE
0 -10 -20 -30 PSRR (dB) -40 -50 -60 -70 -80 -90 -100 1 10 100 1k 10k FREQUENCY (Hz) 100k 1M 100nF LOAD 1nF LOAD 10nF LOAD NO LOAD
FIGURE 90. PSRR vs CAPACITIVE LOAD
0.60 0.50 0.40 0.30 VOUT (mV) 0.20 0.10 0.00 -0.10 -0.20 -0.30 -0.40 -0.50 -0.60 -7 -6 -5 SINKING +25C VOUT (mV) -40C +85C
1.00 0.80 0.60 0.40 0.20 0.00 -0.20 -0.40 -0.60 -0.80 -4 -3 -2 -1 0 1 2 3 4 567 SOURCING -1.00 -20 -18-16-14-12-10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 SOURCING SINKING OUTPUT CURRENT (mA) +25C -40C +85C
OUTPUT CURRENT (mA)
FIGURE 91. LOAD REGULATION ISOURCE-ISINK = 7mA
FIGURE 92. LOAD REGULATION ISOURCE-ISINK = 20mA
26
FN8082.7 August 1, 2006
ISL60002 Typical Performance Characteristic Curves ISL60002, VOUT = 3.3V (Continued)
VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified
200mV/DIV
IL = -50A 200s/DIV
IL = 50A
1V/DIV
IL = -1mA 200s/DIV
IL = 1mA
FIGURE 93. LOAD TRANSIENT RESPONSE
FIGURE 94. LOAD TRANSIENT RESPONSE
1V/DIV
IL = -7mA 200s/DIV
IL = 7mA
1V/DIV
IL = -20mA 200s/DIV
IL = 20mA
FIGURE 95. LOAD TRANSIENT RESPONSE
FIGURE 96. LOAD TRANSIENT RESPONSE
160 5 VIN VIN and VOUT (V) 4 3 2 1 0 ZOUT () 140 120 100 80 60 40 20 0 2 4 6 TIME (ms) 8 10 12 0 1 10
NO LOAD
1nF LOAD
10nF LOAD
360nA
100nF LOAD
100 1k FREQUENCY (Hz)
10k
100k
FIGURE 97. TURN-ON TIME (+25C)
FIGURE 98. ZOUT vs FREQUENCY
27
FN8082.7 August 1, 2006
ISL60002 Applications Information
FGA Technology
The ISL60002 series of voltage references use the floating gate technology to create references with very low drift and supply current. Essentially the charge stored on a floating gate cell is set precisely in manufacturing. The reference voltage output itself is a buffered version of the floating gate voltage. The resulting reference device has excellent characteristics which are unique in the industry: very low temperature drift, high initial accuracy, and almost zero supply current. Also, the reference voltage itself is not limited by voltage bandgaps or zener settings, so a wide range of reference voltages can be programmed (standard voltage settings are provided, but customer-specific voltages are available). The process used for these reference devices is a floating gate CMOS process, and the amplifier circuitry uses CMOS transistors for amplifier and output transistor circuitry. While providing excellent accuracy, there are limitations in output noise level and load regulation due to the MOS device characteristics. These limitations are addressed with circuit techniques discussed in other sections.
VIN VOUT ISL60002 GND 0.001F-0.01F REF IN SERIAL BUS ENABLE SCK SDAT 12 to 24-BIT A/D CONVERTER VIN = +3.0V
10F
0.01F
FIGURE 99.
Board Mounting Considerations
For applications requiring the highest accuracy, board mounting location should be reviewed. Placing the device in areas subject to slight twisting can cause degradation of the accuracy of the reference voltage due to die stresses. It is normally best to place the device near the edge of a board, or the shortest side, as the axis of bending is most limited at that location. Obviously mounting the device on flexprint or extremely thin PC material will likewise cause loss of reference accuracy.
Nanopower Operation
Reference devices achieve their highest accuracy when powered up continuously, and after initial stabilization has taken place. This drift can be eliminated by leaving the power on continuously. The ISL60002 is the first high precision voltage reference with ultra low power consumption that makes it possible to leave power on continuously in battery operated circuits. The ISL60002 consumes extremely low supply current due to the proprietary FGA technology. Supply current at room temperature is typically 350nA which is 1 to 2 orders of magnitude lower than competitive devices. Application circuits using battery power will benefit greatly from having an accurate, stable reference which essentially presents no load to the battery. In particular, battery powered data converter circuits that would normally require the entire circuit to be disabled when not in use can remain powered up between conversions as shown in Figure 99. Data acquisition circuits providing 12 to 24 bits of accuracy can operate with the reference device continuously biased with no power penalty, providing the highest accuracy and lowest possible long term drift. Other reference devices consuming higher supply currents will need to be disabled in between conversions to conserve battery capacity. Absolute accuracy will suffer as the device is biased and requires time to settle to its final value, or, may not actually settle to a final value as power on time may be short.
Noise Performance and Reduction
The output noise voltage in a 0.1Hz to 10Hz bandwidth is typically 30VP-P. This is shown in the plot in the Typical Performance Curves. The noise measurement is made with a bandpass filter made of a 1 pole high-pass filter with a corner frequency at 0.1Hz and a 2-pole low-pass filter with a corner frequency at 12.6Hz to create a filter with a 9.9Hz bandwidth. Noise in the 10kHz to 1MHz bandwidth is approximately 400VP-P with no capacitance on the output, as shown in Figure 100. These noise measurements are made with a 2 decade bandpass filter made of a 1 pole highpass filter with a corner frequency at 1/10 of the center frequency and 1-pole low-pass filter with a corner frequency at 10 times the center frequency. Figure 100 also shows the noise in the 10kHz to 1MHz band can be reduced to about 50VP-P using a 0.001F capacitor on the output. Noise in the 1kHz to 100kHz band can be further reduced using a 0.1F capacitor on the output, but noise in the 1Hz to 100Hz band increases due to instability of the very low power amplifier with a 0.1F capacitance load. For load capacitances above 0.001F the noise reduction network shown in Figure 101 is recommended. This network reduces noise significantly over the full bandwidth. As shown in Figure 100, noise is reduced to less than 40VP-P from 1Hz to 1MHz using this network with a 0.01F capacitor and a 2k resistor in series with a 10F capacitor.
28
FN8082.7 August 1, 2006
ISL60002
400 CL = 0 350 NOISE VOLTAGE (VP-P) 300 250 200 150 100 50 0 1 10 100 1k 10k 100k 0 -1 1 3 5 TIME (ms) 7 9 11 CL = 0.001F CL = 0.1F CL = 0.01F & 10F + 2k VIN AND VOUT (V) 3.0 VIN 2.5 2.0 580nA 1.5 1.0 0.5 3.5
280nA 380nA
FIGURE 100. NOISE REDUCTION
3.5 VIN = 3.0V 10F 0.1F VIN ISL60002 GND 0.01F 10F 2k VIN AND VOUT (V) VO 2.5 2.0 580nA 1.5 1.0 0.5 380nA 280nA 3.0 VIN
FIGURE 101.
Turn-On Time
The ISL60002 devices have ultra-low supply current and thus the time to bias up internal circuitry to final values will be longer than with higher power references. Normal turn-on time is typically 7ms. This is shown in Figure 102. Since devices can vary in supply current down to >300nA, turn-on time can last up to about 12ms. Care should be taken in system design to include this delay before measurements or conversions are started.
0 -1
1
3
5 TIME (ms)
7
9
11
FIGURE 102. TURN-ON TIME
Temperature Coefficient
The limits stated for temperature coefficient (tempco) are governed by the method of measurement. The overwhelming standard for specifying the temperature drift of a reference is to measure the reference voltage at two temperatures, take the total variation, (VHIGH - VLOW), and divide by the temperature extremes of measurement (THIGH - TLOW). The result is divided by the nominal reference voltage (at T = 25C) and multiplied by 106 to yield ppm/C. This is the "Box" method for specifying temperature coefficient.
29
FN8082.7 August 1, 2006
ISL60002 Typical Application Circuits
VIN = 5.0V R = 200 2N2905
VIN ISL60002 VOUT VOUT = 2.50V GND 2.5V/50mA 0.001F
FIGURE 103. PRECISION 2.5V 50mA REFERENCE
2.7 - 5.5V 0.1F 10F
VIN VOUT ISL60002, VOUT = 2.50V GND
0.001F VCC RH + VOUT - RL (BUFFERED) VOUT
X9119 SDA 2-WIRE BUS SCL VSS
FIGURE 104. 2.5V FULL SCALE LOW-DRIFT 10-BIT ADJUSTABLE VOLTAGE SOURCE
+2.7-5.5V 0.1F 10F
VIN VOUT ISL60002 GND + - LOAD VOUT SENSE
FIGURE 105. KELVIN SENSED LOAD
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FN8082.7 August 1, 2006
ISL60002 Packaging Information
3-Lead, SOT-23, Package Code H3
0.007 (0.20) B 0.0003 (0.08) 0.046 (1.18) BSC 0.055 (1.40) 0.047 (1.20) 0.093 (2.35) BSC
B
C L
4X 0.35 H A-B D 0.35 C A-B D 2X N/2 TIPS
1
0.075 (1.90) BSC
2
12 REF. TYP. 0.120 (3.04) 0.110 (2.80) 0.034 (0.88) 0.047 (1.02) 0.038 (0.95) BSC Parting Line Seating Plane 0.0004 (0.01) 0.0040 (0.10) 0.035 (0.89) 0.044 (1.12) 0-8C 0.575 REF. 0.10 R MIN. 0.20 in 0.10 R MIN. SEATING PLANE .024 (0.60) .016 (0.40)
NOTES: 1. All dimensions in inches (in parentheses in millimeters). 2. Package dimensions exclude molding flash. 3. Die and die paddle is facing down towards seating plane. 4. This part is compliant with JEDEC Specification TO-236AB. 5. Dimensioning and tolerances per ASME, Y14.5M-1994.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed 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 31
FN8082.7 August 1, 2006

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