ISL28134FHZ-T7

DATASHEET ISL28134 FN6957 Rev 6.00 October 14, 2014 5V Ultra Low Noise, Zero Drift Rail-to-Rail Precision Op Amp 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 uses auto-correction circuitry to provide very low input offset voltage, drift and a reduction of the 1/f noise corner below 0.1Hz. The ISL28134 achieves ultra low offset voltage, offset temperature drift, wide gain bandwidth and railto-rail input/output swing while minimizing power consumption. Features The ISL28134 is ideal for amplifying the sensor signals of analog front-ends that include pressure, temperature, medical, strain gauge and inertial sensors down to the µV levels. • Low offset voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5µV, Max The ISL28134 can be used over standard amplifiers with high stability across the industrial temperature range of -40°C to +85°C and the full industrial temperature range of -40°C to +125°C. The ISL28134 is available in an industry standard pinout SOIC and SOT-23 packages. • Rail-to-rail inputs and outputs - CMRR at 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 . . . . . . . . . . . . . . . . . 10nV/Hz at 1kHz - 0.1Hz to 10Hz noise voltage . . . . . . . . . . . . . . . . . 250nVP-P • 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 . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C Applications • Medical instrumentation • Sensor gain amps • Packaging - Single: SOIC, SOT-23 • Precision low drift, low frequency ADC drivers • Precision voltage reference buffers • Thermopile, thermocouple, and other temperature sensors front-end amplifiers • Inertial sensors Related Literature • AN1641, “ISL28134SOICEVAL1Z Evaluation Board User’s Guide” • AN1560, “Making Accurate Voltage Noise and Current Noise Measurements on Operational Amplifiers Down to 0.1Hz” • Process control systems • Weight scales and strain gauge sensors +5 ISL28134 0Ω ISL22316 + ISL26102 50Ω 35 - 24-BIT ADC 50kΩ 0 35 35 0Ω ISL21010 Ω DCP - 50kΩ 50Ω 5V VREF + ISL28134 FIGURE 1. PRECISION WEIGH SCALE / STRAIN GAUGE FN6957 Rev 6.00 October 14, 2014 NUMBER OF AMPLIFIERS 1600 1400 1200 Vs = ±2.5V VCM = 0V T = -40°C to +125°C N = 2796 1000 800 600 400 200 0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5 FIGURE 2. VOS HISTOGRAM VS = 5V Page 1 of 25 ISL28134 Pin Configurations ISL28134 (8 LD SOIC) TOP VIEW ISL28134 (5 LD SOT-23) TOP VIEW OUT 1 V- 2 IN+ 3 5 V+ 4 IN- + - NC 1 IN- 2 IN+ V- 8 NC 7 V+ 3 6 OUT 4 5 NC - + Pin Descriptions ISL28134 (8 Ld SOIC) ISL28134 (5 Ld SOT-23) PIN NAME FUNCTION 2 4 IN- Inverting input 3 3 IN+ Non-inverting input EQUIVALENT CIRCUIT (See Circuit 1) V+ + - IN+ + IN- CLOCK GEN + DRIVERS VCircuit 1 4 2 V- 6 1 OUT Negative supply Output V+ OUT VCircuit 2 7 5 V+ Positive supply 1, 5, 8 - NC No Connect FN6957 Rev 6.00 October 14, 2014 Pin is floating. No connection made to IC. Page 2 of 25 ISL28134 Ordering Information PART NUMBER (Note 4) PART MARKING ISL28134IBZ (Notes 1, 3) 28134 IBZ ISL28134FHZ-T7 (Notes 2, 3) BEEA (Note 5) ISL28134FHZ-T7A (Notes 2, 3) BEEA (Note 5) ISL28134ISENSEV1Z Evaluation Board ISL28134SOICEVAL1Z Evaluation Board TEMP RANGE (°C) -40°C to +85°C PACKAGE (Pb-Free) PKG. DWG. # 8 Ld SOIC M8.15E -40°C to +125°C 5 Ld SOT-23 P5.064A -40°C to +125°C 5 Ld SOT-23 P5.064A 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. For Moisture Sensitivity Level (MSL), please see device information page for ISL28134. For more information on MSL please see techbrief TB363. 5. The part marking is located on the bottom of the part. FN6957 Rev 6.00 October 14, 2014 Page 3 of 25 ISL28134 Absolute Maximum Ratings Thermal Information Supply Voltage V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.5V Voltage VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . (V- - 0.3V) to (V+ + 0.3V) V Input Differential Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA Voltage VOUT to GND (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(V+) or (V-) 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 Resistance (Typical) JA (°C/W) JC (°C/W) 5 Ld SOT-23 (Notes 6, 7) . . . . . . . . . . . . . . . 225 116 8 Ld SOIC (Notes 6, 7) . . . . . . . . . . . . . . . . . 125 77.2 Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493 Operating Conditions Ambient Operating Temperature Range Industrial Grade Package . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C Full Industrial Grade Package. . . . . . . . . . . . . . . . . . . . .-40°C to +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: 6. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 7. For JC, the “case temp” location is taken at the package top center. Electrical Specifications operating temperature range. PARAMETER VS = 5V, VCM = 2.5V, TA = +25°C, unless otherwise specified. Boldface limits apply across the specified DESCRIPTION TEST CONDITIONS MIN (Note 8) TYP MAX (Note 8) UNITS -2.5 -0.2 2.5 µV DC SPECIFICATIONS VOS Input Offset Voltage TCVOS Input Offset Voltage Temperature Coefficient IB Input Bias Current TCIB IOS TCIOS Input Bias Current Temperature Coefficient PSRR VS FN6957 Rev 6.00 October 14, 2014 -3.4 - 3.4 µV -4 - -4 µV TA = -40°C to +125°C -15 -0.5 15 nV/°C -300 ±120 300 pA TA = -40°C to +85°C -300 - 300 pA TA = -40°C to +125°C -550 - 550 pA TA = -40°C to +85°C - ±1.4 - pA/°C TA = -40°C to +125°C - ±2 - pA/°C -600 ±240 600 pA TA = -40°C to +85°C -600 - 600 pA TA = -40°C to +125°C -750 - 750 pA - ±2.8 - pA/°C TA = -40°C to +125°C - ±4 - pA/°C V+ = 5.0V, V- = 0V Guaranteed by CMRR -0.1 - 5.1 V VCM = -0.1V to 5.1V 120 135 - dB VCM = -0.1V to 5.1V 115 - - dB Input Offset Current Input Offset Current Temperature Coefficient TA = -40°C to +85°C Common Mode Input Voltage Range CMRR TA = -40°C to +85°C TA = -40°C to +125°C Common Mode Rejection Ratio Power Supply Rejection Ratio Supply Voltage (V+ to V-) VS = 2.25V to 6.0V 120 135 - dB VS = 2.25V to 6.0V 120 - - dB Guaranteed by PSRR 2.25 - 6.0 V Page 4 of 25 ISL28134 Electrical Specifications operating temperature range. (Continued) PARAMETER IS ISC VOH VS = 5V, VCM = 2.5V, TA = +25°C, unless otherwise specified. Boldface limits apply across the specified DESCRIPTION Supply Current Per Amplifier TEST CONDITIONS MIN (Note 8) TYP MAX (Note 8) UNITS RL = OPEN - 675 900 µA RL = OPEN TA = -40°C to +85°C - - 1075 µA RL = OPEN TA = -40°C to +125°C - - 1150 µA Short Circuit Output Source Current RL = Short to V- - 65 - mA Short Circuit Output Sink Current RL = Short to V+ - -65 - mA Output Voltage Swing, HIGH From VOUT to V+ RL = 10kΩto VCM 15 10 - mV RL = 10kΩto VCM 15 - - mV - 10 15 mV VOL Output Voltage Swing, LOW From V- to VOUT RL = 10kΩto VCM RL = 10kΩto VCM - - 15 mV AOL Open Loop Gain RL = 1MΩ - 174 - dB Input Capacitance Differential - 5.2 - pF Common Mode - 5.6 - pF f = 0.1Hz to 10Hz - 250 400 nVP-P AC SPECIFICATIONS CIN eN IN Input Noise Voltage Input Noise Current f = 10Hz - 8 - nV/Hz f = 1kHz - 10 - nV/Hz f = 1kHz - 200 - fA/Hz GBWP Gain Bandwidth Product - 3.5 - MHz EMIRR EMI Rejection Ratio AV = +1, VIN = 200mVp-p, VCM = 0V, V+ = 2.5V, V- = -2.5V - 75 - dB Positive Slew Rate V+ = 5V, V- = 0V, VOUT = 1V to 3V, RL = 100kΩ, CL = 3.7pF - 1.5 - V/µs - 1.0 - V/µs - 0.07 - µs - 0.17 - µs - 1.3 - µs - 2.0 - µs - 100 - µs - 3.1 - µs -2.5 -0.2 2.5 µV -3.4 - 3.4 µV TRANSIENT RESPONSE SR 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% 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 ts Settling Time to 0.1%, 2VP-P Step AV = -1, RF = 1kΩ, CL = 3.7pF trecover Output Overload Recovery Time, Recovery AV = +2, RF = 10kΩ, RL = 100k, CL = 3.7pF to 90% of Output Saturation VOS Input Offset Voltage TA = -40°C to +85°C TCVOS FN6957 Rev 6.00 October 14, 2014 Input Offset Voltage Temperature Coefficient TA = -40°C to +125°C -4 - -4 µV TA = -40°C to +125°C -15 -0.5 15 nV/°C Page 5 of 25 ISL28134 Electrical Specifications operating temperature range. PARAMETER VS = 2.5V, VCM = 1.25V, TA = +25°C, unless otherwise specified. Boldface limits apply over the specified MIN (Note 8) TYP MAX (Note 8) UNITS -300 ±120 300 pA TA = -40°C to +85°C -300 - 300 pA TA = -40°C to +125°C -550 - 550 pA TA = -40°C to +85°C - ±1.4 - pA/°C TA = -40°C to +125°C - ±2 - pA/°C -600 ±240 600 pA TA = -40°C to +85°C -600 - 600 pA TA = -40°C to +125°C -750 - 750 pA TA = -40°C to +85°C - ±2.8 - pA/°C TA = -40°C to +125°C - ±4 - pA/°C V+ = 2.5V, V- = 0V Guaranteed by CMRR -0.1 - 2.6 V VCM = -0.1V to 2.6V 120 135 - dB VCM = -0.1V to 2.6V DESCRIPTION TEST CONDITIONS DC SPECIFICATIONS IB TCIB IOS TCIOS Input Bias Current Input Bias Current Temperature Coefficient Input Offset Current Input Offset Current Temperature Coefficient Common Mode Input Voltage Range CMRR Common Mode Rejection Ratio IS Supply Current per Amplifier 115 - - dB RL = OPEN - 715 940 µA RL = OPEN TA = -40°C to +85°C - - 1115 µA RL = OPEN TA = -40°C to +125°C - - 1190 µA Short Circuit Output Source Current RL = Short to Ground - 65 - mA Short Circuit Output Sink Current RL = Short to V+ - -65 - mA VOH Output Voltage Swing, HIGH From VOUT to V+ RL = 10kΩ to VCM 15 10 - mV RL = 10kΩ to VCM 15 - - mV VOL Output Voltage Swing, LOW From V- to VOUT RL = 10kΩ to VCM - 10 15 mV RL = 10kΩ to VCM - - 15 mV Differential - 5.2 - pF Common Mode - 5.6 - pF f = 0.1Hz to 10Hz - 250 400 nVP-P f = 10Hz - 8 - nV/Hz f = 1kHz - 10 - nV/Hz f = 1kHz - 200 - fA/Hz - 3.5 - MHz ISC AC SPECIFICATIONS CIN eN Input Capacitance Input Noise Voltage IN Input Noise Current GBWP Gain Bandwidth Product FN6957 Rev 6.00 October 14, 2014 Page 6 of 25 ISL28134 Electrical Specifications operating temperature range. (Continued) PARAMETER VS = 2.5V, VCM = 1.25V, TA = +25°C, unless otherwise specified. Boldface limits apply over the specified DESCRIPTION TEST CONDITIONS MIN (Note 8) TYP MAX (Note 8) UNITS - 1.5 - V/µs - 1.0 - V/µs - 0.07 - µs - 0.17 - µs - 1.3 - µs - 2.0 - µs - 100 - µs - 1.5 - µs TRANSIENT RESPONSE SR Positive Slew Rate V+ = 2.5V, V- = 0V, VOUT = 0.25V to 2.25V, RL = 100kΩ, CL = 3.7pF Negative Slew Rate tr, tf, Small Signal Rise Time, tr 10% to 90% V+ = 2.5V, V- = 0V, VOUT = 0.1VP-P, RF = 0Ω, RL = 100kΩ, CL = 3.7pF Fall Time, tf 10% to 90% tr, tf Large Signal Rise Time, tr 10% to 90% V+ = 2.5V, V- = 0V, VOUT = 2VP-P, RF = 0Ω, RL = 100kΩ, CL = 3.7pF Fall Time, tf 10% to 90% ts Settling Time to 0.1%, 2VP-P Step trecover Output Overload Recovery Time, Recovery AV = +2, RF = 10kΩ, RL = 100k, to 90% of Output Saturation CL = 3.7pF AV = -1, RF = 1kΩ, CL = 3.7pF NOTE: 8. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design. TA = +25°C, VCM = 0V Unless otherwise specified. 2.0 2.0 1.5 1.5 1.0 1.0 OFFSET VOLTAGE (µV) OFFSET VOLTAGE (µV) Typical Performance Curves 0.5 0 -0.5 -1.0 VS = ±2.5V -1.5 -20 0 -0.5 -1.0 10 70 40 TEMPERATURE (°C) 100 130 40 70 100 130 160 Vs = ±2.5V VCM = 0V T = -40°C to +125°C N = 2796 140 NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS 10 FIGURE 4. VOS vs TEMPERATURE, VS = ±1.125V 1000 800 600 400 120 Vs = ±2.5V VCM = 0V T = -40°C to +125°C N = 480 100 80 60 40 20 200 0 -20 TEMPERATURE (°C) 1600 1200 VCM = 0V -2.0 -50 FIGURE 3. VOS vs TEMPERATURE, VS = ±2.5V 1400 VS = ±1.125V -1.5 VCM = 0V -2.0 -50 0.5 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 VOS (µV) FIGURE 5. VOS HISTOGRAM VS = 5V FN6957 Rev 6.00 October 14, 2014 2.0 2.5 0 -10 -8 -6 -4 -2 0 2 4 6 8 10 TCVOS (nV/°C) FIGURE 6. TCVOS HISTOGRAM VS = 5V Page 7 of 25 ISL28134 Typical Performance Curves TA = +25°C, VCM = 0V Unless otherwise specified. (Continued) 120 1400 Vs = ±1.25V VCM = 0V T = -40°C to +125°C N = 2325 1000 800 600 400 80 60 40 20 200 0 Vs = ±1.25V VCM = 0V T = -40°C to +125°C N = 310 100 NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS 1200 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 0 2.5 -10 -8 -6 -4 4 4 3 3 2 2 Vs = ±2.5V 0 -1 -2 Vs = ±1.125V -3 6 8 10 0 -1 -2 -2.4 -1.6 -0.8 0 0.8 1.6 2.4 -4 1.0 3.2 1.5 2.0 2.5 3.0 3.5 SUPPLY VOLTAGE (V) COMMON MODE VOLTAGE (V) FIGURE 10. VOS vs SUPPLY VOLTAGE 600 500 400 IB+ Vs = ±2.5V 500 IB+ Vs = ±1.125V INPUT OFFSET CURRENT (pA) INPUT BIAS CURRENT (pA) 4 1 FIGURE 9. VOS vs VCM 200 100 0.00 IB- Vs = ±2.5V IB- Vs = ±1.125V -100 -200 -300 -400 -500 -3 2 -3 -4 -3.2 300 0 FIGURE 8. TCVOS HISTOGRAM VS = 2.5V OFFSET VOLTAGE (µV) OFFSET VOLTAGE (µV) FIGURE 7. VOS HISTOGRAM VS = 2.5V 1 -2 TCVOS (nV/°C) VOS (µV) -2 -1 0 1 COMMON MODE VOLTAGE (V) FIGURE 11. IB vs VCM FN6957 Rev 6.00 October 14, 2014 2 3 400 300 Vs = ±2.5V 200 100 -100 Vs = ±1.125V -200 -3 -2 -1 0 1 2 COMMON MODE VOLTAGE (V) FIGURE 12. IOS vs VCM Page 8 of 25 3 ISL28134 Typical Performance Curves TA = +25°C, VCM = 0V Unless otherwise specified. (Continued) 350 350 IB+ VS = ±2.5V 300 INPUT OFFSET CURRENT (pA) INPUT BIAS CURRENT (pA) 300 250 IB+ VS = ±1.125V 200 150 IBVS = ±1.125V 100 IBVS = ±2.5V 50 0 -50 250 VS = ±2.5V 200 150 100 50 VS = ±1.125V 0 -50 -100 -100 -40 -20 0 20 40 60 80 100 120 -150 -40 140 -20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) TEMPERATURE (°C) FIGURE 13. IB vs TEMPERATURE FIGURE 14. IOS vs TEMPERATURE 160 1000 T = +125°C CMRR/PSRR (dB) SUPPLY CURRENT (µA) PSRR 150 140 130 CMRR 120 PSRR VS = ±1.125V TO ±3V VCM = 0V 110 100 -40 -20 0 20 CMRR VS =±2.5V VCM = -2.6V TO +2.6V 40 60 80 100 120 900 800 T = +25°C 700 600 500 2.0 140 T = +85°C T = -40°C 6.0 5.0 SUPPLY VOLTAGE (V) FIGURE 15. CMRR and PSRR vs TEMPERATURE FIGURE 16. SUPPLY CURRENT vs SUPPLY VOLTAGE 1000 1000 VS = ±2.5V T = -40°C to +125°C VS = ±2.5V T = -40°C to +125°C VOLTAGE FROM V- RAIL (mV) VOLTAGE FROM V+ RAIL (mV) 4.0 3.0 TEMPERATURE (°C) 100 10 1 0.01 0.1 1.0 10 100 LOAD CURRENT (mA) FIGURE 17. OUTPUT HIGH OVERHEAD VOLTAGE vs LOAD CURRENT FN6957 Rev 6.00 October 14, 2014 100 10 1 0.01 0.1 1.0 10 100 LOAD CURRENT (mA) FIGURE 18. OUTPUT LOW OVERHEAD VOLTAGE vs LOAD CURRENT Page 9 of 25 ISL28134 Typical Performance Curves TA = +25°C, VCM = 0V Unless otherwise specified. (Continued) 1.0 1.0 RL = 1kΩ VOLTAGE FROM V- RAIL (mV) VOLTAGE FROM V+ RAIL (mV) VS = ±2.5V RL = OUT to GND 0.1 0.01 RL = 12.5kΩ VS = ±2.5V RL = OUT to GND RL = 1kΩ 0.1 0.01 RL = 12.5kΩ 0.001 -40 -20 0 20 40 60 80 100 120 0.001 -40 140 -20 0 20 40 60 80 100 120 140 9 10 TEMPERATURE (°C) TEMPERATURE (°C) FIGURE 19. VOH vs TEMPERATURE FIGURE 20. VOL vs TEMPERATURE 300 100 VOLTAGE (nV) NOISE (nV√Hz) 200 10 100 0.00 -100 VS = ±2.5V AV = 10,000 Rg = 10, Rf = 100k -200 1 0.001 0.01 0.1 1 -300 10 0 1 2 3 4 7 8 140 1000 VS = ±2.5V AV = 1 RS = 5MΩ 100 CIN+ =100pF 100 80 60 40 20 VS = ±2.5V RL = 10MΩ 0 1 10 100 1000 10k 100k FREQUENCY (Hz) FIGURE 23. INPUT NOISE CURRENT DENSITY vs FREQUENCY FN6957 Rev 6.00 October 14, 2014 PHASE GAIN 120 GAIN (dB) / PHASE (°) CIN+ = 0pF CURRENT NOISE (fA/√Hz) 6 FIGURE 22. INPUT NOISE VOLTAGE 0.1Hz TO 10Hz FIGURE 21. INPUT NOISE VOLTAGE DENSITY vs FREQUENCY 10 0.1 5 TIME (s) FREQUENCY (Hz) -20 SIMULATION 0.1 1 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FIGURE 24. OPEN LOOP GAIN AND PHASE, RL = 10M Page 10 of 25 ISL28134 Typical Performance Curves TA = +25°C, VCM = 0V Unless otherwise specified. (Continued) 90 140 PHASE GAIN 80 70 60 100 50 80 GAIN (dB) GAIN (dB) / PHASE (°) 120 60 40 40 30 20 10 0 20 0 VS = ±2.5V -10 RL = 10kΩ -20 SIMULATION -20 0.1 1 10 AV = 10,000 Rg = 10, Rf = 100k AV = 1000 Rg = 100, Rf = 100k AV = 100 AV = 10 VS = ± 2.5V CL = 3.7pF RL = 100k VOUT = 10mVP-P Rg = 1k, Rf = 100k Rg = 10k, Rf = 100k AV = 1 Rg = OPEN, Rf = 0 -30 100 1k 10k 100k 1M 10M -40 100M 10 100 1k 10k 100k 10M 1M 100M FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 25. OPEN LOOP GAIN AND PHASE, RL = 10k FIGURE 26. FREQUENCY RESPONSE vs CLOSED LOOP GAIN 2 4 1 2 0 -2 GAIN (dB) GAIN (dB) RL > 10kΩ 0 1 RL > 10kΩ -3 -4 -2 RL = 1kΩ -4 RL = 1kΩ -5 -6 VS = ± 1.25V AV = 1V CL = 3.7pF VOUT = 10mVP-P -6 -7 -8 10k -8 100k 1M -10 100k 10M VS = ± 2.5V AV = 1V CL = 3.7pF VOUT = 10mVP-P 1M FREQUENCY (Hz) FIGURE 27. GAIN vs FREQUENCY vs RL, VS = 2.5V 2 Rg = 100k, Rf = 100k VS = ± 2.5V AV = 2V RL = 100k VOUT = 10mVP-P 10 0 -2 Rg = 1k, Rf = 1k 0 GAIN (dB) Rg = 10k, Rf = 10k 5 -4 1VP-P 500mVP-P -6 -5 -10 100M FIGURE 28. GAIN vs FREQUENCY vs RL, VS = 5.0V 15 NORMALIZED GAIN (dB) 10M FREQUENCY (Hz) -8 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FIGURE 29. GAIN vs FREQUENCY vs FEEDBACK RESISTOR VALUES Rf/Rg FN6957 Rev 6.00 October 14, 2014 -10 10 250mVP-P VS = ± 2.5V AV = 1V RL = OPEN CL = 3.7pF 100 100mVP-P 10mVP-P 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FIGURE 30. GAIN vs FREQUENCY vs VOUT Page 11 of 25 ISL28134 Typical Performance Curves 12 2 824pF VS = ± 2.5V AV = 1V RL = 100k VOUT = 10mVP-P 10 8 ±1.5V 1nF -2 GAIN (dB) 104pF 4 2 51pF 0 ±0.8V -4 -6 VOUT = 10mVP-P AV = 1V RL = 100k CL = 3.7pF -2 -8 3.7pF -4 -6 10k 100k 1M 10M ±3.0V 0 474pF 6 GAIN (dB) TA = +25°C, VCM = 0V Unless otherwise specified. (Continued) -10 1M 100M 10M FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 32. GAIN vs FREQUENCY vs SUPPLY VOLTAGE FIGURE 31. GAIN vs FREQUENCY vs CL 120 EMIRR IN+ (dB) 100 80 60 40 20 0 10 100 1k 10k FREQUENCY (MHz) 160 160 140 140 120 120 CMRR (dB) CMRR (dB) FIGURE 33. EMIRR AT IN+ PIN vs FREQUENCY 100 80 60 20 40 SIMULATION 1m 0.1 10 1k 100k FREQUENCY (Hz) FIGURE 34. CMRR vs FREQUENCY, VS = 5V FN6957 Rev 6.00 October 14, 2014 80 60 VS = ±2.5V VCM = 0V 40 100 10M 20 1m VS = ±1.25V VCM = 0V SIMULATION 0.1 10 1k 100k 10M FREQUENCY (Hz) FIGURE 35. CMRR vs FREQUENCY, VS = 2.5V Page 12 of 25 ISL28134 Typical Performance Curves TA = +25°C, VCM = 0V Unless otherwise specified. (Continued) 120 140 -PSRR 120 100 +PSRR 80 +PSRR GAIN (dB) GAIN (dB) 100 80 60 -PSRR 60 40 VS = ± 2.5VDC AV = 1V RL = 100k VIN = 1VP-P 40 20 0 10 100 VS = ± 1.25VDC AV = 1V RL = 100k VIN = 1VP-P 20 1k 10k 100k 1M 0 10 10M 100 1k FREQUENCY (Hz) 4 4.5 3 4.0 2 3.5 1 3.0 0 VS = ±2.5V AV = 1V RL = 1MΩ VIN = -3V TO 3V -2 5 10 10M 2.5 2.0 OUTPUT 1.5 VS = 5VDC AV = 1V RL = 100k VIN = 1V TO 4V 0.5 0 1M INPUT 1.0 -3 -4 100k FIGURE 37. PSRR vs FREQUENCY, VS = 2.5V VOLTAGE (V) VOLTAGE (V) FIGURE 36. PSRR vs FREQUENCY, VS = 5V -1 10k FREQUENCY (Hz) 15 0.0 20 0 5 10 TIME (ms) 15 20 TIME (µs) FIGURE 38. NO PHASE INVERSION FIGURE 39. LARGE SIGNAL STEP RESPONSE (3V) 1.2 0.10 1.0 INPUT VOLTAGE (V) VOLTAGE (V) 0.08 0.8 0.6 OUTPUT 0.4 0 0 2 4 6 INPUT 0.02 VS = ±2.5VDC AV = 1V RL = 100k VIN = 0V TO 0.1V -0.02 8 TIME (µs) FIGURE 40. LARGE SIGNAL STEP RESPONSE (1V) FN6957 Rev 6.00 October 14, 2014 0.04 0 VS = 5VDC AV = 1V RL = 100k VIN = 0.1V TO 1.1V 0.2 OUTPUT 0.06 10 -0.04 0 2 4 6 8 TIME (µs) FIGURE 41. SMALL SIGNAL STEP RESPONSE (100mV) Page 13 of 25 10 ISL28134 Typical Performance Curves TA = +25°C, VCM = 0V Unless otherwise specified. (Continued) 55 60 50 55 - OS 45 40 35 +OS 30 25 VS = ±2.5V AV = 1V RL = 100k VOUT = 100mVp-p 20 15 10 10 - OS 45 OVERSHOOT (%) OVERSHOOT (%) 50 100 1000 LOAD CAPACITANCE (pF) FIGURE 42. SMALL SIGNAL OVERSHOOT vs LOAD CAPACITANCE, VS = ±2.5V Applications Information Functional Description 40 35 30 +OS 25 VS = ±1.25V AV = 1V RL = 100k VOUT = 100mVp-p 20 15 10 10 100 1000 LOAD CAPACITANCE (pF) FIGURE 43. SMALL SIGNAL OVERSHOOT vs LOAD CAPACITANCE, VS = ±1.25V 0.01µF or larger high frequency decoupling capacitor is placed across the power supply pins of the IC to maintain high performance of the amplifier. 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 100kΩ, the input referred noise voltage will be dominated by the input current noise. Keep source input impedances under 10kΩ for optimum performance. Page 14 of 25 ISL28134 IN+ and IN- Protection TABLE 1. PART VOLTAGE NOISE AT 100Hz 0.1Hz TO 10Hz PEAK-TO-PEAK VOLTAGE NOISE Competitor A 22nV/√Hz 600nVP-P Competitor B 16nV/√Hz 260nVP-P Competitor C 90nV/√Hz 1500nVP-P ISL28134 8nV/√Hz 250nVP-P The ISL28134 is capable of driving the input terminals up to and beyond the supply rails by about 0.5V. Back biased ESD diodes from the input pins to the V+ and V- rails will conduct current when the input signals go more than 0.5V beyond the rail (see Figure 45). The ESD protection diodes must be current limited to 20mA or less to prevent damage of the IC. This current can be reduced by placing a resistor in series with the IN+ and IN- inputs in the event the input signals go beyond the rail. High Source Impedance Applications The input stage of Chopper Stabilized amplifiers do not behave like conventional amplifier input stages. The ISL28134 uses switches at the chopper amplifier input that continually ‘chops’ the input signal at 100kHz to reduce input offset voltage down to 1µV. The dynamic behavior of these switches induces a charge injection current to the input terminals of the amplifier. The charge injection current has a DC path to ground through the resistances seen at the input terminals of the amplifier. Higher input impedance cause an apparent shift in the input bias current of the amplifier. Input impedances larger than 10kΩ begin to have significant increases in the bias currents. To minimize the effect of impedance on input bias currents, an input resistance of