ISL28134_1107

5V Ultra Low Noise, Zero Drift Rail-to-Rail Precision Op Amp ISL28134 The ISL28134 is a single, chopper-stabilized zero-drift operational amplifier optimized for single and dual supply operation from 2.25V to 6.0V and ±1.125V and ±3.0V. The ISL28134 features very low input offset voltage and low noise with no 1/f noise corner down to 0.1Hz. The ISL28134 is designed to have ultra low offset voltage and offset temperature drift, wide gain bandwidth and rail-to-rail input/output swing while minimizing power consumption. This amplifier is ideal for amplifying the sensor signals of analog front-ends that include pressure, temperature, medical, strain gauge and inertial sensors. The ISL28134 can be used over standard amplifiers with high stability over the industrial temperature range of -40°C to +85°C. The ISL28134 is available in an industry standard pinout SOIC package. Features • Rail-to-Rail Inputs and Outputs - CMRR @ VCM = 0.1V beyond VS . . . . . . . . . . . . .135dB, typ. - VOH and VOL . . . . . . . . . . . . . . . . . . . . . . 10mV from VS, typ. • No 1/f Noise Corner Down to 0.1Hz - Input Noise Voltage . . . . . . . . . . . . . . . . .10 nV/√Hz @ 1kHz - 0.1Hz to 10Hz Noise Voltage . . . . . . . . . . . . . . . . 250nVP-P • Low Offset Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5µV, Max • Superb Offset Drift . . . . . . . . . . . . . . . . . . . . . . . 15nV/°C, Max • Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.25V to 6.0V • Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . ±1.125V to ±3.0V • Low ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 675µA, typ. • Wide Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5MHz • Operating Temperature Range - Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C - Full Industrial (Coming Soon) . . . . . . . . . .-40°C to +125°C • Packaging - Single: SOIC, SOT-23, µTDFN (1.6mmx1.6mm) Applications • Medical Instrumentation • Sensor Gain Amps • Precision Low Drift, Low Frequency ADC Drivers • Precision Voltage Reference Buffers • Thermopile, Thermocouple, and other Temperature Sensors Front-end Amplifiers • Inertial Sensors • Process Control Systems • Weight Scales and Strain Gauge Sensors Related Literature • See AN1641, “ISL28134 Evaluation Board Manual” • See AN1560, “Making Accurate Voltage Noise and Current Noise Measurements on Operational Amplifiers Down to 0.1Hz” 3V 1MΩ SINGLE SUPPLY HIGH GAIN AMPLIFIER AV = 10,000 V/V NUMBER OF AMPLIFIERS 1400 1200 1000 800 600 400 200 0 Vs = ±2.5V VCM = 0V T = -40°C to +85°C N = 2330 0.1µ 100 100 + ANALOG SENSOR INPUT 1MΩ GND RL VOUT -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 VOS (µV) 1.0 1.5 2.0 2.5 FIGURE 1. TYPICAL APPLICATION FIGURE 2. VOS HISTOGRAM VS = 5V July 25, 2011 FN6957.2 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2011. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL28134 Pin Configurations ISL28134 (5 LD SOT-23) TOP VIEW OUT VIN+ 1 2 3 5 V+ NC IN4 ININ+ V1 2 3 4 -+ ISL28134 (8 LD SOIC) TOP VIEW 8 7 6 5 NC V+ OUT NC +- ISL28134 (6 LD µTDFN) TOP VIEW V- 1 IN- 2 IN+ 3 -+ 6 5 V+ NC 4 OUT Pin Descriptions ISL28134 (8 Ld SOIC) 2 3 ISL28134 (6Ld µTDFN) 2 3 ISL28134 (5Ld SOT-23) 4 3 PIN NAME ININ+ FUNCTION Inverting input Non-inverting input (See Circuit 1) V+ + IN+ + EQUIVALENT CIRCUIT INV- CLOCK GEN + DRIVERS Circuit 1 4 6 1 4 2 1 VOUT Negative supply Output V+ OUT VCircuit 2 7 1, 5, 8 6 5 5 - V+ NC Positive supply No Connect Pin is floating. No connection made to IC. 2 FN6957.2 July 25, 2011 ISL28134 Ordering Information PART NUMBER (Note 5) ISL28134IBZ (Notes 1, 3) Coming Soon ISL28134FBZ (Notes 1, 3) Coming Soon ISL28134FRUZ-T7 (Notes 2, 4) Coming Soon ISL28134FHZ-T7 (Notes 2, 3) Coming Soon ISL28134FHZ-T7A (Notes 2, 3) ISL28134SOICEVAL1Z NOTES: 1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. Please refer to TB347 for details on reel specifications. 3. 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. 4. These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and NiPdAu plate - e4 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. 5. For Moisture Sensitivity Level (MSL), please see device information page for ISL28134. For more information on MSL please see techbrief TB363. 6. The part marking is located on the bottom of the part. PART MARKING 28134 IBZ 28134 FBZ U8 BEEA (Note 6) BEEA (Note 6) Evaluation Board TEMP RANGE (°C) -40°C to +85°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C PACKAGE (Pb-Free) 8 Ld SOIC 8 Ld SOIC 6 Ld µTDFN 5 Ld SOT-23 5 Ld SOT-23 PKG. DWG. # M8.15E M8.15E L6.1.6x1.6 P5.064A P5.064A 3 FN6957.2 July 25, 2011 ISL28134 Absolute Maximum Ratings Max Supply Voltage V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.5V Max Voltage VIN to GND . . . . . . . . . . . . . . . . . . . (V- - 0.3V) to (V+ + 0.3V) V Max Input Differential Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V Max Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA Max Voltage VOUT to GND (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . .(V+) or (V-) Max dv/dt Supply Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V/µs ESD Rating Human Body Model (Tested per JED22-A114F) . . . . . . . . . . . . . . . . . 4kV Machine Model (Tested per JED22-A115B). . . . . . . . . . . . . . . . . . . . 300V Charged Device Model (Tested per JED22-C110D) . . . . . . . . . . . . . . 2kV Latch-Up (Passed Per JESD78B). . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C Thermal Information Thermal Resistance (Typical) θJA (°C/W) θJC (°C/W) 5 Ld SOT-23 (Notes 7, 8) . . . . . . . . . . . . . . . 225 116 8 Ld SOIC (Notes 7, 8) . . . . . . . . . . . . . . . . . 125 77 6 Ld µTDFN (Notes 7, 8) . . . . . . . . . . . . . . . 220 120 Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Operating Conditions Ambient Operating Temperature Range . . . . . . . . . . . . . . . -40°C to +85°C Maximum Operating Junction Temperature . . . . . . . . . . . . . . . . . . .+125°C Operating Voltage Range. . . . . . . . . . . . . . . . . 2.25V (±1.125V) to 6V (±3V) 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: 7. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 8. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside. Electrical Specifications temperature range, -40°C to +85°C. PARAMETER DC SPECIFICATIONS VOS VS = 5V, VCM = 2.5V, TA = +25°C, unless otherwise specified. Boldface limits apply over the operating MIN MAX TYP DESCRIPTION CONDITIONS (Note 9) (Note 9) UNIT Input Offset Voltage TA = -40°C to +85°C -2.5 -3.4 -15 -300 TA = -40°C to +85°C -300 -600 TA = -40°C to +85°C -600 V+ = 5.0V, V- = 0V Guaranteed by CMRR TA = -40°C to +85°C -0.1 -0.2 -0.5 ±120 ±1.4 ±240 ±2.8 - 2.5 3.4 15 300 300 600 600 5.1 µV µV nV/°C pA pA pA/°C pA pA pA/°C V TCVOS IB Output Voltage Temperature Coefficient Input Bias Current TA = -40°C to +85°C TCIB IOS Input Bias Current Temperature Coefficient Input Offset Current TCIOS Common Mode Input Voltage Range CMRR Input Offset Current Temperature Coefficient Common Mode Rejection Ratio VCM = -0.1V to 5.1V VCM = -0.1V to 5.1V TA = -40°C to +85°C 120 115 120 120 2.25 - 135 135 675 - 6.0 900 1075 dB dB dB dB V µA µA PSRR Power Supply Rejection Ratio Vs = 2.25V to 6.0V Vs = 2.25V to 6.0V TA = -40°C to +85°C Vs IS Supply Voltage (V+ to V-) Supply Current per Amplifier Guaranteed by PSRR TA = -40°C to +85°C RL = OPEN RL = OPEN TA = -40°C to +85°C 4 FN6957.2 July 25, 2011 ISL28134 Electrical Specifications VS = 5V, VCM = 2.5V, TA = +25°C, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) MIN PARAMETER ISC DESCRIPTION Short Circuit Output Source Current Short Circuit Output Sink Current VOH Output Voltage Swing, HIGH From VOUT to V+ RL = Short to VRL = Short to V+ RL = 10kΩ to VCM RL = 10kΩ to VCM TA = -40°C to +85°C RL = 10kΩ to VCM RL = 10kΩ to VCM TA = -40°C to +85°C RL = 1MΩ CONDITIONS MAX TYP 65 -65 10 10 174 (Note 9) 15 15 - (Note 9) 15 15 - UNIT mA mA mV mV mV mV dB VOL Output Voltage Swing, LOW From V- to VOUT AOL AC SPECIFICATIONS CIN Open Loop Gain Input Capacitance Differential Common Mode - 5.2 5.6 250 8 10 200 3.5 400 - pF pF nVP-P nV/√Hz nV/√Hz fA/√Hz MHz eN Input Noise Voltage f = 0.1Hz to 10Hz f = 10Hz f = 1kHz IN GBWP TRANSIENT RESPONSE SR Input Noise Current Gain Bandwidth Product f = 1kHz Positive Slew Rate Negative Slew Rate V+ = 5V, V- = 0V, VOUT = 1V to 3V, RL = 100kΩ, CL = 3.7pF V+ = 5V, V- = 0V, VOUT = 0.1VP-P, RF = 0Ω, RL = 100kΩ, CL = 3.7pF V+ = 5V, V- = 0V, VOUT = 2VP-P, RF = 0Ω, RL = 100kΩ, CL = 3.7pF AV = -1, RF = 1kΩ, CL = 3.7pF - 1.5 1.0 0.07 0.17 1.3 2.0 100 3.1 - V/µs V/µs µs µs µs µs µs µs tr, tf, Small Signal Rise Time, tr 10% to 90% Fall Time, tf 10% to 90% tr, tf Large Signal Rise Time, tr 10% to 90% Fall Time, tf 10% to 90% ts trecover Settling Time to 0.1%, 2VP-P Step Output Overload Recovery Time, Recovery AV = +2, RF = 10kΩ, RL = 100k, CL = 3.7pF to 90% of Output Saturation Electrical Specifications temperature range, -40°C to +85°C. PARAMETER DC SPECIFICATIONS VOS VS = 2.5V, VCM = 1.25V, TA = +25°C, unless otherwise specified. Boldface limits apply over the operating MIN MAX TYP DESCRIPTION CONDITIONS (Note 9) (Note 9) UNIT Input Offset Voltage TA = -40°C to +85°C -2.5 -3.4 -15 - 300 TA = -40°C to +85°C -300 - -0.2 -0.5 ±120 ±1.4 2.5 3.4 15 300 300 - µV µV nV/°C pA pA pA/°C TCVOS IB Output Voltage Temperature Coefficient Input Bias Current TCIB Input Bias Current Temperature Coefficient 5 FN6957.2 July 25, 2011 ISL28134 Electrical Specifications PARAMETER IOS VS = 2.5V, VCM = 1.25V, TA = +25°C, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) MIN DESCRIPTION Input Offset Current TA = -40°C to +85°C TCIOS Common Mode Input Voltage Range CMRR Common Mode Rejection Ratio Input Offset Current Temperature Coefficient V+ = 2.5V, V- = 0V Guaranteed by CMRR VCM = -0.1V to 2.6V VCM = -0.1V to 2.6V TA = -40°C to +85°C IS Supply Current per Amplifier RL = OPEN RL = OPEN VCM = -0.1V to 2.6V ISC Short Circuit Output Source Current Short Circuit Output Sink Current VOH Output Voltage Swing, HIGH From VOUT to V+ RL = Short to Ground RL = Short to V+ RL = 10kΩ to VCM RL = 10kΩ to VCM TA = -40°C to +85°C RL = 10kΩ to VCM RL = 10kΩ to VCM TA = -40°C to +85°C CONDITIONS MAX TYP ±240 ±2.8 135 715 65 -65 10 10 - (Note 9) -600 -600 -0.1 120 115 15 15 - (Note 9) 600 600 2.6 940 1115 15 15 UNIT pA pA pA/°C V dB dB µA µA mA mA mV mV mV mV VOL Output Voltage Swing, LOW From V- to VOUT AC SPECIFICATIONS CIN Input Capacitance Differential Common Mode eN Input Noise Voltage f = 0.1Hz to 10Hz f = 10Hz f = 1kHz IN GBWP Input Noise Current Gain Bandwidth Product f = 1kHz 5.2 5.6 250 8 10 200 3.5 400 pF pF nVP-P nV/√Hz nV/√Hz fA/√Hz MHz TRANSIENT RESPONSE SR Positive Slew Rate Negative Slew Rate tr, tf, Small Signal Rise Time, tr 10% to 90% Fall Time, tf 10% to 90% tr, tf Large Signal Rise Time, tr 10% to 90% Fall Time, tf 10% to 90% ts trecover Settling Time to 0.1%, 2VP-P Step V+ = 2.5V, V- = 0V, VOUT = 0.25V to 2.25V, RL = 100kΩ, CL = 3.7pF V+ = 2.5V, V- = 0V, VOUT = 0.1VP-P, RF = 0Ω, RL = 100kΩ, CL = 3.7pF V+ = 2.5V, V- = 0V, VOUT = 2VP-P, RF = 0Ω, RL = 100kΩ, CL = 3.7pF AV = -1, RF = 1kΩ, CL = 3.7pF 1.5 1.0 0.07 0.17 1.3 2.0 100 1.5 V/µs V/µs µs µs µs µs µs µs Output Overload Recovery Time, Recovery AV = +2, RF = 10kΩ, RL = 100k, to 90% of Output Saturation CL = 3.7pF NOTE: 9. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. 6 FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves 2.0 1.5 OFFSET VOLTAGE (µV) OFFSET VOLTAGE (µV) VS = ±2.5V VCM = 0V -15 10 35 60 85 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -40 TA =+25°C, VCM = 0V Unless otherwise specified. 2.0 1.5 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 VS = ±1.125V VCM = 0V -40 -15 10 35 60 85 TEMPERATURE (°C) TEMPERATURE (°C) FIGURE 3. VOS vs TEMPERATURE, VS = ±2.5V FIGURE 4. VOS vs TEMPERATURE, VS = ±1.125V 1400 1200 NUMBER OF AMPLIFIERS 1000 800 600 400 200 0 -2.5 -2.0 Vs = ±2.5V VCM = 0V T = -40°C to +85°C N = 2330 160 140 NUMBER OF AMPLIFIERS 120 100 80 60 40 20 0 -10 Vs = ±2.5V VCM = 0V T = -40°C to +85°C N = 465 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 -8 -6 -4 -2 0 2 4 6 8 10 VOS (µV) TCVOS (nV/°C) FIGURE 5. VOS HISTOGRAM VS = 5V FIGURE 6. TCVOS HISTOGRAM VS = 5V 1400 1200 NUMBER OF AMPLIFIERS 1000 800 600 400 200 0 -2.5 Vs = ±1.25V VCM = 0V T = -40°C to +85°C N = 2325 120 100 80 60 Vs = ±1.25V VCM = 0V T = -40°C to +85°C N = 310 NUMBER OF AMPLIFIERS 40 20 0 -10 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 -8 -6 -4 -2 0 2 4 6 8 10 VOS (µV) TCVOS (nV/°C) FIGURE 7. VOS HISTOGRAM VS = 2.5V FIGURE 8. TCVOS HISTOGRAM VS = 2.5V 7 FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves 4 3 OFFSET VOLTAGE (µV) OFFSET VOLTAGE (µV) 2.4 2 1 0 -1 -2 -3 -4 Vs = ±1.125V Vs = ±2.5V TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 4 3 2 1 0 -1 -2 -3 -4 -3.2 -2.4 -1.6 -0.8 0 0.8 1.6 3.2 1.0 1.5 2.0 2.5 3.0 3.5 COMMON MODE VOLTAGE (V) SUPPLY VOLTAGE (V) FIGURE 9. VOS vs VCM FIGURE 10. VOS vs SUPPLY VOLTAGE 500 400 INPUT BIAS CURRENT (pA) 300 200 100 0 -100 -200 -300 -400 -500 IB- Vs = ±2.5V IB- Vs = ±1.125V IB+ Vs = ±2.5V 600 IB+ Vs = ±1.125V 500 400 300 200 100 -100 -200 -3 -2 -1 0 1 2 3 -3 -2 -1 0 1 2 3 COMMON MODE VOLTAGE (V) COMMON MODE VOLTAGE (V) INPUT OFFSET CURRENT (pA) Vs = ±2.5V Vs = ±1.125V FIGURE 11. IB vs VCM FIGURE 12. IOS vs VCM 200 150 INPUT BIAS CURRENT (pA) 100 50 0 -50 -100 -150 -200 -40 IBVs = ±2.5V IBVs = ±1.125V IB+ Vs = ±2.5V INPUT OFFSET CURRENT (pA) 400 350 300 250 200 150 100 50 0 Vs = ±1.125V Vs = ±2.5V IB+ Vs = ±1.125V -20 0 20 40 60 80 100 -50 -40 -15 10 35 60 85 TEMPERATURE (°C) TEMPERATURE (°C) FIGURE 13. IB vs TEMPERATURE FIGURE 14. IOS vs TEMPERATURE 8 FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves 160 150 CMRR/PSRR (dB) 140 130 120 110 100 -40 PSRR Vs = ±1.125V to ±3V VCM = 0V -15 10 CMRR CMRR Vs =±2.5V VCM = -2.6V to +2.6V 35 60 85 PSRR SUPPLY CURRENT (µA) 900 800 T = -40°C T = +25°C T = +85°C TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 1000 700 600 500 2.0 3.0 4.0 SUPPLY VOLTAGE (V) 5.0 6.0 TEMPERATURE (°C) FIGURE 15. CMRR and PSRR vs TEMPERATURE 1000 Vs = ±2.5V T = -40°C to +85°C VOLTAGE FROM V+ RAIL (mV) VOLTAGE FROM V- RAIL (mV) FIGURE 16. SUPPLY CURRENT vs SUPPLY VOLTAGE 1000 Vs = ±2.5V T = -40°C to +85°C 100 100 10 10 1 0.01 0.1 1.0 LOAD CURRENT (mA) 10 100 1 0.01 0.1 1.0 10 100 LOAD CURRENT (mA) FIGURE 17. OUTPUT HIGH OVERHEAD VOLTAGE vs LOAD CURRENT FIGURE 18. OUTPUT LOW OVERHEAD VOLTAGE vs LOAD CURRENT 35 30 VOLTAGE FROM V- RAIL (mV) 25 20 15 10 5 0 RL = 12.5kΩ -40 -15 10 35 60 85 Vs = ±2.5V RL = OUT to GND RL = 1kΩ 45 40 VOLTAGE FROM V+ RAIL (mV) 35 30 25 20 15 10 5 0 -40 -15 10 35 60 85 TEMPERATURE (°C) Vs = ±2.5V RL = OUT to GND RL = 12.5kΩ RL = 1kΩ TEMPERATURE (°C) FIGURE 19. VOH vs TEMPERATURE FIGURE 20. VOL vs TEMPERATURE 9 FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves 100 TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 300 200 VOLTAGE NOISE (nV/√Hz) VOLTAGE (nV) 100 0 10 -100 -200 -300 0 Vs = ±2.5V AV = 10,000 Rg = 10, Rf = 100k 1 2 3 4 5 TIME (s) 6 7 8 9 10 Vs = ±2.5V AV = 1 1 0.001 0.01 0.1 1 10 100 1000 10k 100k FREQUENCY (Hz) FIGURE 21. INPUT NOISE VOLTAGE DENSITY vs FREQUENCY FIGURE 22. INPUT NOISE VOLTAGE 0.1Hz TO 10Hz 1000 Vs = ±2.5V AV = 1 RS = 5MΩ GAIN (dB) / PHASE (°) 140 120 100 80 60 40 20 0 100 1000 10k 100k -20 0.1 Vs = ±2.5V RL = 10MΩ SIMULATION 1 10 100 1k 10k 100k 1M 10M 100M GAIN PHASE CURRENT NOISE (fA/√Hz) 100 CIN+ = 0pF CIN+ =100pF 10 0.1 1 10 FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 23. INPUT NOISE CURRENT DENSITY vs FREQUENCY FIGURE 24. OPEN LOOP GAIN AND PHASE, RL = 10M 140 GAIN 120 GAIN (dB) / PHASE (°) 100 GAIN (dB) 80 60 40 20 0 -20 0.1 1 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) Vs = ±2.5V RL = 10kΩ SIMULATION PHASE 90 80 70 60 50 40 30 20 10 0 -10 -20 -30 -40 10 AV = 10,000 AV = 1000 AV = 100 AV = 10 AV = 1 Rg = 10, Rf = 100k Rg = 100, Rf = 100k Vs = ± 2.5V CL = 3.7pF RL = 100k VOUT = 10mVP-P Rg = 1k, Rf = 100k Rg = 10k, Rf = 100k Rg = OPEN, Rf = 0 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FIGURE 25. OPEN LOOP GAIN AND PHASE, RL = 10k FIGURE 26. FREQUENCY RESPONSE vs CLOSED LOOP GAIN 10 FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves 2 1 0 1 GAIN (dB) GAIN (dB) -2 -3 -4 -5 -6 -7 -8 10k Vs = ± 1.25V AV = 1V CL = 3.7pF VOUT = 10mVP-P 100k 1M 10M RL > 10kΩ 2 0 -2 -4 -6 -8 Vs = ± 2.5V AV = 1V CL = 3.7pF VOUT = 10mVP-P 1M 10M FREQUENCY (Hz) 100M RL = 1kΩ RL > 10kΩ TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 4 RL = 1kΩ -10 100k FREQUENCY (Hz) FIGURE 27. GAIN vs FREQUENCY vs RL, VS = 2.5V FIGURE 28. GAIN vs FREQUENCY vs R L, VS = 5.0V 15 Vs = ± 2.5V AV = 2V RL = 100k VOUT = 10mVP-P Rg = 100k, Rf = 100k 2 0 10 NORMALIZED GAIN (dB) Rg = 10k, Rf = 10k GAIN (dB) 5 -2 -4 1VP-P 500mVP-P 0 Rg = 1k, Rf = 1k -6 -5 -8 -10 10 Vs = ± 2.5V AV = 1V RL = OPEN CL = 3.7pF 100 1k 10k 250mVP-P 100mVP-P 10mVP-P 100k 1M 10M 100M -10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 29. GAIN vs FREQUENCY vs FEEDBACK RESISTOR VALUES Rf/Rg 12 10 8 6 GAIN (dB) 4 2 0 -2 -4 -6 10k 100k 1M FREQUENCY (Hz) 10M 100M 3.7pF -8 -10 1M 51pF Vs = ± 2.5V AV = 1V RL = 100k VOUT = 10mVP-P 824pF 1nF 474pF 0 2 FIGURE 30. GAIN vs FREQUENCY vs VOUT ±1.5V ±3.0V 104pF GAIN (dB) -2 -4 ±0.8V -6 VOUT = 10mVP-P AV = 1V RL = 100k CL = 3.7pF 10M FREQUENCY (Hz) FIGURE 31. GAIN vs FREQUENCY vs CL FIGURE 32. GAIN vs FREQUENCY vs SUPPLY VOLTAGE 11 FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves 160 140 120 CMRR (dB) CMRR (dB) 100 80 60 40 20 1m TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 160 140 120 100 80 60 40 20 1m Vs = ±2.5V VCM = 0V SIMULATION 0.1 10 1k 100k 10M Vs = ±1.25V VCM = 0V SIMULATION 0.1 10 1k 100k 10M FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 33. CMRR vs FREQUENCY, VS = 5V FIGURE 34. CMRR vs FREQUENCY, VS = 2.5V 140 120 100 GAIN (dB) 80 60 40 20 0 10 Vs = ± 2.5VDC AV = 1V RL = 100k VIN = 1VP-P 100 1k 10k 100k 1M 10M GAIN (dB) +PSRR -PSRR 120 100 80 60 40 20 0 Vs = ± 1.25VDC AV = 1V RL = 100k VIN = 1VP-P 100 1k 10k 100k 1M 10M +PSRR -PSRR 10 FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 35. PSRR vs FREQUENCY, VS = 5V FIGURE 36. PSRR vs FREQUENCY, VS = 2.5V 4 3 2 VOLTAGE (V) VOLTAGE (V) 1 0 -1 -2 -3 -4 0 5 10 TIME (ms) 15 20 Vs = ±2.5V AV = 1V RL = 1MΩ VIN = -3V to 3V 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 5 10 TIME (µs) 15 20 OUTPUT Vs = 5VDC AV = 1V RL = 100k VIN = 1V to 4V INPUT FIGURE 37. NO PHASE INVERSION FIGURE 38. LARGE SIGNAL STEP RESPONSE (3V) 12 FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves 1.2 0.10 1.0 0.08 VOLTAGE (V) 0.8 VOLTAGE (V) 0.6 0.4 0.2 0 OUTPUT Vs = 5VDC AV = 1V RL = 100k VIN = 0.1V to 1.1V 0 2 4 TIME (µs) 6 8 10 INPUT 0.06 0.04 0.02 0 -0.02 -0.04 0 2 4 TIME (µs) Vs = ±2.5VDC AV = 1V RL = 100k VIN = 0V to 0.1V 6 8 10 OUTPUT TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) INPUT FIGURE 39. LARGE SIGNAL STEP RESPONSE (1V) 60 55 50 OVERSHOOT (%) 45 40 35 30 25 20 15 10 10 100 LOAD CAPACITANCE (pF) 1000 Vs = ±2.5V AV = 1V RL = 100k VOUT = 100mVpp +OS OVERSHOOT (%) - OS FIGURE 40. SMALL SIGNAL STEP RESPONSE (100mV) 55 50 45 40 35 30 25 20 15 10 10 100 LOAD CAPACITANCE (pF) 1000 Vs = ±1.25V AV = 1V RL = 100k VOUT = 100mVpp +OS - OS FIGURE 41. SMALL SIGNAL OVERSHOOT vs LOAD CAPACITANCE, Vs = ±2.5V FIGURE 42. SMALL SIGNAL OVERSHOOT vs LOAD CAPACITANCE, Vs = ±1.25V Applications Information Functional Description The ISL28134 is a single 5V rail-to-rail input/output amplifier that operates on a single or dual supply. The ISL28134 uses a proprietary chopper-stabilized technique that combines a 3.5MHz main amplifier with a very high open loop gain (174dB) chopper amplifier to achieve very low offset voltage and drift (0.2µV, 0.5nV/°C) while having a low supply current (675µA). The very low 1/f noise corner