5V Ultra Low Noise, Zero Drift Rail-to-Rail Precision Op Amp ISL28134 Features 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. • Rail-to-Rail Inputs and Outputs - CMRR @ VCM = 0.1V beyond VS . . . . . . . . . . . . .135dB, typ. - VOH and VOL . . . . . . . . . . . . . . . . . . . . . . 10mV from VS, typ. 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. • 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 Applications • Medical Instrumentation • Sensor Gain Amps • Packaging - Single: SOIC, SOT-23, µTDFN (1.6mmx1.6mm) • Precision Low Drift, Low Frequency ADC Drivers • Precision Voltage Reference Buffers • Thermopile, Thermocouple, and other Temperature Sensors Front-end Amplifiers 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” • Inertial Sensors • Process Control Systems • Weight Scales and Strain Gauge Sensors 1400 SINGLE SUPPLY HIGH GAIN AMPLIFIER AV = 10,000 V/V 1MΩ 0.1µ 100 VOUT 100 + RL ANALOG SENSOR INPUT 1MΩ 1200 NUMBER OF AMPLIFIERS 3V 1000 Vs = ±2.5V VCM = 0V T = -40°C to +85°C N = 2330 800 600 400 200 0 GND FIGURE 1. TYPICAL APPLICATION July 25, 2011 FN6957.2 1 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 VOS (µV) 1.0 1.5 2.0 2.5 FIGURE 2. VOS HISTOGRAM VS = 5V 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 (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 - + ISL28134 (6 LD µTDFN) TOP VIEW 6 V+ IN- 2 5 NC - + V- 1 IN+ 3 4 OUT Pin Descriptions ISL28134 (8 Ld SOIC) ISL28134 (6Ld µTDFN) ISL28134 (5Ld SOT-23) PIN NAME 2 2 4 IN- Inverting input 3 3 3 IN+ Non-inverting input FUNCTION EQUIVALENT CIRCUIT (See Circuit 1) V+ + - IN+ + IN- CLOCK GEN + DRIVERS VCircuit 1 4 1 2 V- 6 4 1 OUT Negative supply Output V+ OUT VCircuit 2 7 6 5 V+ Positive supply 1, 5, 8 5 - NC No Connect 2 Pin is floating. No connection made to IC. FN6957.2 July 25, 2011 ISL28134 Ordering Information PART NUMBER (Note 5) PART MARKING TEMP RANGE (°C) PACKAGE (Pb-Free) PKG. DWG. # ISL28134IBZ (Notes 1, 3) 28134 IBZ -40°C to +85°C 8 Ld SOIC M8.15E Coming Soon ISL28134FBZ (Notes 1, 3) 28134 FBZ -40°C to +125°C 8 Ld SOIC M8.15E Coming Soon ISL28134FRUZ-T7 (Notes 2, 4) U8 -40°C to +125°C 6 Ld µTDFN L6.1.6x1.6 Coming Soon ISL28134FHZ-T7 (Notes 2, 3) BEEA (Note 6) -40°C to +125°C 5 Ld SOT-23 P5.064A Coming Soon ISL28134FHZ-T7A (Notes 2, 3) BEEA (Note 6) -40°C to +125°C 5 Ld SOT-23 P5.064A ISL28134SOICEVAL1Z Evaluation Board 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. 3 FN6957.2 July 25, 2011 ISL28134 Absolute Maximum Ratings Thermal Information 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 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. VS = 5V, VCM = 2.5V, TA = +25°C, unless otherwise specified. Boldface limits apply over the operating MIN PARAMETER DESCRIPTION CONDITIONS MAX (Note 9) TYP (Note 9) UNIT -2.5 -0.2 2.5 µV -3.4 - 3.4 µV DC SPECIFICATIONS VOS Input Offset Voltage TA = -40°C to +85°C TCVOS Output Voltage Temperature Coefficient IB Input Bias Current TA = -40°C to +85°C -15 -0.5 15 nV/°C -300 ±120 300 pA -300 - 300 pA - ±1.4 - pA/°C -600 ±240 600 pA -600 - 600 pA - ±2.8 - pA/°C V+ = 5.0V, V- = 0V Guaranteed by CMRR TA = -40°C to +85°C -0.1 - 5.1 V VCM = -0.1V to 5.1V 120 135 - dB VCM = -0.1V to 5.1V TA = -40°C to +85°C 115 - - dB Vs = 2.25V to 6.0V 120 135 - dB Vs = 2.25V to 6.0V TA = -40°C to +85°C 120 - - dB Guaranteed by PSRR TA = -40°C to +85°C 2.25 - 6.0 V RL = OPEN - 675 900 µA RL = OPEN TA = -40°C to +85°C - - 1075 µA TA = -40°C to +85°C TCIB Input Bias Current Temperature Coefficient IOS Input Offset Current TA = -40°C to +85°C TCIOS Input Offset Current Temperature Coefficient Common Mode Input Voltage Range CMRR PSRR Common Mode Rejection Ratio Power Supply Rejection Ratio Vs Supply Voltage (V+ to V-) IS Supply Current per Amplifier 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 DESCRIPTION ISC VOH VOL AOL CONDITIONS (Note 9) MAX TYP (Note 9) UNIT 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 TA = -40°C to +85°C 15 - - mV Output Voltage Swing, LOW From V- to VOUT RL = 10kΩ to VCM - 10 15 mV RL = 10kΩ to VCM TA = -40°C to +85°C - - 15 mV 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 f = 10Hz - 8 - nV/√Hz f = 1kHz - 10 - nV/√Hz f = 1kHz - 200 - fA/√Hz - 3.5 - MHz - 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 AC SPECIFICATIONS CIN eN Input Noise Voltage IN Input Noise Current GBWP Gain Bandwidth Product 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% 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 ts Settling Time to 0.1%, 2VP-P Step trecover 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. AV = -1, RF = 1kΩ, CL = 3.7pF VS = 2.5V, VCM = 1.25V, TA = +25°C, unless otherwise specified. Boldface limits apply over the operating MIN PARAMETER DESCRIPTION CONDITIONS MAX (Note 9) TYP (Note 9) UNIT -2.5 -0.2 2.5 µV -3.4 - 3.4 µV -15 -0.5 15 nV/°C - 300 ±120 300 pA -300 - 300 pA - ±1.4 - pA/°C DC SPECIFICATIONS VOS Input Offset Voltage TA = -40°C to +85°C TCVOS Output Voltage Temperature Coefficient IB Input Bias Current TA = -40°C to +85°C TCIB Input Bias Current Temperature Coefficient 5 FN6957.2 July 25, 2011 ISL28134 Electrical Specifications 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 PARAMETER IOS DESCRIPTION CONDITIONS Input Offset Current IS ISC VOH VOL (Note 9) UNIT -600 ±240 600 pA - 600 pA - ±2.8 - 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 TA = -40°C to +85°C 115 - - dB RL = OPEN - 715 940 µA RL = OPEN VCM = -0.1V to 2.6V - - 1115 µA Short Circuit Output Source Current RL = Short to Ground - 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 TA = -40°C to +85°C 15 - - mV Output Voltage Swing, LOW From V- to VOUT RL = 10kΩ to VCM - 10 15 mV RL = 10kΩ to VCM TA = -40°C to +85°C - - 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 - 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 Input Offset Current Temperature Coefficient Common Mode Input Voltage Range CMRR TYP -600 TA = -40°C to +85°C TCIOS MAX (Note 9) Common Mode Rejection Ratio Supply Current per Amplifier AC SPECIFICATIONS CIN eN Input Capacitance Input Noise Voltage IN Input Noise Current GBWP Gain Bandwidth Product 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% 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 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: 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 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 0 -0.5 -1.0 VS = ±1.125V -1.5 VCM = 0V -2.0 -40 0.5 -15 10 35 60 -2.0 85 VCM = 0V -40 -15 10 FIGURE 3. VOS vs TEMPERATURE, VS = ±2.5V Vs = ±2.5V VCM = 0V T = -40°C to +85°C N = 2330 140 800 600 400 200 120 Vs = ±2.5V VCM = 0V T = -40°C to +85°C N = 465 100 80 60 40 20 0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 0 -10 2.5 -8 -6 -4 NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS 2 4 6 8 10 120 Vs = ±1.25V VCM = 0V T = -40°C to +85°C N = 2325 800 600 400 100 Vs = ±1.25V VCM = 0V T = -40°C to +85°C N = 310 80 60 40 20 200 0 -2.5 0 FIGURE 6. TCVOS HISTOGRAM VS = 5V 1400 1000 -2 TCVOS (nV/°C) VOS (µV) FIGURE 5. VOS HISTOGRAM VS = 5V 1200 85 160 NUMBER OF AMPLIFIERS NUMBER OF AMPLIFIERS 1000 60 FIGURE 4. VOS vs TEMPERATURE, VS = ±1.125V 1400 1200 35 TEMPERATURE (°C) TEMPERATURE (°C) -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 VOS (µV) FIGURE 7. VOS HISTOGRAM VS = 2.5V 7 2.0 2.5 0 -10 -8 -6 -4 -2 0 2 4 6 8 10 TCVOS (nV/°C) FIGURE 8. TCVOS HISTOGRAM VS = 2.5V FN6957.2 July 25, 2011 ISL28134 TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 4 4 3 3 2 OFFSET VOLTAGE (µV) OFFSET VOLTAGE (µV) Typical Performance Curves Vs = ±2.5V 1 0 -1 -2 Vs = ±1.125V -3 -4 2 1 0 -1 -2 -3 -3.2 -2.4 -1.6 -0.8 0 0.8 1.6 2.4 -4 3.2 1.0 1.5 2.0 COMMON MODE VOLTAGE (V) 500 IB+ Vs = ±2.5V 300 IB+ Vs = ±1.125V INPUT OFFSET CURRENT (pA) INPUT BIAS CURRENT (pA) 3.5 600 400 200 100 IB- Vs = ±1.125V IB- Vs = ±2.5V 0 -100 -200 -300 500 400 300 Vs = ±2.5V 200 100 -100 Vs = ±1.125V -400 -200 -3 -2 -1 0 1 2 -3 3 FIGURE 11. IB vs VCM IBVs = ±1.125V IB+ Vs = ±1.125V -50 IBVs = ±2.5V -100 -150 -200 -40 1 2 3 350 INPUT OFFSET CURRENT (pA) 150 0 0 400 IB+ Vs = ±2.5V 50 -1 FIGURE 12. IOS vs VCM 200 100 -2 COMMON MODE VOLTAGE (V) COMMON MODE VOLTAGE (V) INPUT BIAS CURRENT (pA) 3.0 FIGURE 10. VOS vs SUPPLY VOLTAGE FIGURE 9. VOS vs VCM -500 2.5 SUPPLY VOLTAGE (V) 300 Vs = ±2.5V 250 200 150 100 Vs = ±1.125V 50 0 -20 0 20 40 60 TEMPERATURE (°C) FIGURE 13. IB vs TEMPERATURE 8 80 100 -50 -40 -15 10 35 60 85 TEMPERATURE (°C) FIGURE 14. IOS vs TEMPERATURE FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 160 1000 CMRR/PSRR (dB) SUPPLY CURRENT (µA) PSRR 150 140 130 CMRR 120 CMRR Vs =±2.5V VCM = -2.6V to +2.6V PSRR Vs = ±1.125V to ±3V VCM = 0V 110 100 -40 -15 10 35 60 900 800 T = -40°C 600 3.0 TEMPERATURE (°C) 5.0 6.0 FIGURE 16. SUPPLY CURRENT vs SUPPLY VOLTAGE 1000 1000 Vs = ±2.5V T = -40°C to +85°C VOLTAGE FROM V- RAIL (mV) Vs = ±2.5V T = -40°C to +85°C VOLTAGE FROM V+ RAIL (mV) 4.0 SUPPLY VOLTAGE (V) FIGURE 15. CMRR and PSRR vs TEMPERATURE 100 10 1 0.01 1.0 0.1 10 100 10 1 0.01 100 1.0 0.1 LOAD CURRENT (mA) 10 100 LOAD CURRENT (mA) FIGURE 17. OUTPUT HIGH OVERHEAD VOLTAGE vs LOAD CURRENT FIGURE 18. OUTPUT LOW OVERHEAD VOLTAGE vs LOAD CURRENT 35 45 40 30 VOLTAGE FROM V- RAIL (mV) VOLTAGE FROM V+ RAIL (mV) T = +25°C 700 500 2.0 85 T = +85°C 35 RL = 1kΩ 30 25 20 15 Vs = ±2.5V RL = OUT to GND 10 5 25 RL = 1kΩ 20 15 Vs = ±2.5V RL = OUT to GND 10 5 RL = 12.5kΩ 0 -40 -15 10 35 TEMPERATURE (°C) FIGURE 19. VOH vs TEMPERATURE 9 60 85 0 RL = 12.5kΩ -40 -15 10 35 60 85 TEMPERATURE (°C) FIGURE 20. VOL vs TEMPERATURE FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 100 300 VOLTAGE (nV) VOLTAGE NOISE (nV/√Hz) 200 10 0.01 0 -100 -200 Vs = ±2.5V AV = 1 1 0.001 100 0.1 1 10 100 1000 -300 0 100k 10k Vs = ±2.5V AV = 10,000 Rg = 10, Rf = 100k 1 2 3 4 7 8 9 10 140 1000 Vs = ±2.5V AV = 1 RS = 5MΩ 100 100 80 60 40 20 CIN+ = 0pF CIN+ =100pF 10 0.1 1 Vs = ±2.5V RL = 10MΩ 0 10 100 1000 10k -20 100k SIMULATION 0.1 1 10 100 FREQUENCY (Hz) 90 80 PHASE GAIN 70 120 60 100 50 GAIN (dB) 80 60 40 40 30 20 10 0 Vs = ±2.5V RL = 10kΩ SIMULATION 1 10 AV = 10,000 100k 1M 10M 100M 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 -10 Rg = OPEN, Rf = 0 -20 -30 -20 0.1 10k FIGURE 24. OPEN LOOP GAIN AND PHASE, RL = 10M 140 0 1k FREQUENCY (Hz) FIGURE 23. INPUT NOISE CURRENT DENSITY vs FREQUENCY 20 PHASE GAIN 120 GAIN (dB) / PHASE (°) CURRENT NOISE (fA/√Hz) 6 FIGURE 22. INPUT NOISE VOLTAGE 0.1Hz TO 10Hz FIGURE 21. INPUT NOISE VOLTAGE DENSITY vs FREQUENCY GAIN (dB) / PHASE (°) 5 TIME (s) FREQUENCY (Hz) 100 1k 10k 100k 1M 10M FREQUENCY (Hz) FIGURE 25. OPEN LOOP GAIN AND PHASE, RL = 10k 10 100M -40 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FIGURE 26. FREQUENCY RESPONSE vs CLOSED LOOP GAIN FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 2 4 1 2 0 GAIN (dB) GAIN (dB) -2 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 RL > 10kΩ 0 1 10k Vs = ± 2.5V AV = 1V CL = 3.7pF VOUT = 10mVP-P -8 100k 1M -10 100k 10M 1M 15 2 Rg = 100k, Rf = 100k Vs = ± 2.5V AV = 2V RL = 100k VOUT = 10mVP-P 10 0 -2 Rg = 10k, Rf = 10k 5 Rg = 1k, Rf = 1k 0 GAIN (dB) NORMALIZED GAIN (dB) 100M FIGURE 28. GAIN vs FREQUENCY vs R L, VS = 5.0V FIGURE 27. GAIN vs FREQUENCY vs RL, VS = 2.5V -4 1VP-P 500mVP-P -6 -5 250mVP-P Vs = ± 2.5V AV = 1V RL = OPEN CL = 3.7pF -8 -10 100 1k 10k 100k 10M 1M -10 10 100M 100 100mVP-P 10mVP-P 1k 10k 12 8 ±1.5V 1nF -2 GAIN (dB) 104pF 4 2 0 51pF -4 ±0.8V -6 VOUT = 10mVP-P AV = 1V RL = 100k CL = 3.7pF -2 -8 3.7pF -4 -6 100k 1M 10M FREQUENCY (Hz) FIGURE 31. GAIN vs FREQUENCY vs CL 11 ±3.0V 0 474pF 6 10k 100M 10M 2 824pF Vs = ± 2.5V AV = 1V RL = 100k VOUT = 10mVP-P 1M FIGURE 30. GAIN vs FREQUENCY vs VOUT FIGURE 29. GAIN vs FREQUENCY vs FEEDBACK RESISTOR VALUES Rf/Rg 10 100k FREQUENCY (Hz) FREQUENCY (Hz) GAIN (dB) 10M FREQUENCY (Hz) FREQUENCY (Hz) 100M -10 1M 10M FREQUENCY (Hz) FIGURE 32. GAIN vs FREQUENCY vs SUPPLY VOLTAGE FN6957.2 July 25, 2011 ISL28134 TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 160 160 140 140 120 120 CMRR (dB) CMRR (dB) Typical Performance Curves 100 80 60 40 20 1m 100 80 60 Vs = ±2.5V VCM = 0V Vs = ±1.25V VCM = 0V 40 SIMULATION 0.1 10 100k 1k 10M SIMULATION 20 1m 0.1 10 FREQUENCY (Hz) FIGURE 33. CMRR vs FREQUENCY, VS = 5V 10M 120 -PSRR 120 100 100 80 60 40 0 10 100 -PSRR 60 40 Vs = ± 2.5VDC AV = 1V RL = 100k VIN = 1VP-P 20 +PSRR 80 +PSRR GAIN (dB) GAIN (dB) 100k FIGURE 34. CMRR vs FREQUENCY, VS = 2.5V 140 Vs = ± 1.25VDC AV = 1V RL = 100k VIN = 1VP-P 20 1k 10k 100k 1M 0 10M 10 100 1k FREQUENCY (Hz) 10k 100k 1M 10M FREQUENCY (Hz) FIGURE 35. PSRR vs FREQUENCY, VS = 5V FIGURE 36. PSRR vs FREQUENCY, VS = 2.5V 4 4.5 3 4.0 3.5 2 1 VOLTAGE (V) VOLTAGE (V) 1k FREQUENCY (Hz) 0 -1 Vs = ±2.5V AV = 1V RL = 1MΩ VIN = -3V to 3V -2 INPUT 3.0 2.5 2.0 OUTPUT 1.5 Vs = 5VDC AV = 1V RL = 100k VIN = 1V to 4V 1.0 -3 0.5 -4 0 0 5 10 15 TIME (ms) FIGURE 37. NO PHASE INVERSION 12 20 0 5 10 15 20 TIME (µs) FIGURE 38. LARGE SIGNAL STEP RESPONSE (3V) FN6957.2 July 25, 2011 ISL28134 Typical Performance Curves TA =+25°C, VCM = 0V Unless otherwise specified. (Continued) 1.2 0.10 1.0 0.08 INPUT VOLTAGE (V) VOLTAGE (V) 0.8 0.6 OUTPUT 0.4 0 2 0 INPUT 0.02 Vs = ±2.5VDC AV = 1V RL = 100k VIN = 0V to 0.1V -0.02 -0.04 6 4 0.04 0 Vs = 5VDC AV = 1V RL = 100k VIN = 0.1V to 1.1V 0.2 OUTPUT 0.06 8 10 0 6 4 8 10 FIGURE 40. SMALL SIGNAL STEP RESPONSE (100mV) FIGURE 39. LARGE SIGNAL STEP RESPONSE (1V) 60 55 55 50 - OS 50 40 +OS 35 30 25 Vs = ±2.5V AV = 1V RL = 100k VOUT = 100mVpp 20 15 10 10 100 LOAD CAPACITANCE (pF) 1000 FIGURE 41. SMALL SIGNAL OVERSHOOT vs LOAD CAPACITANCE, Vs = ±2.5V 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 <0.1Hz and low input noise voltage (8nV/√Hz @ 100Hz) of the amplifier makes it ideal for low frequency precision applications requiring very high gain and low noise. This multi-path amplifier architecture contains a time continuous main amplifier whose input DC offset is corrected by a parallel-connected, high gain chopper stabilized DC correction amplifier operating at 100kHz. From DC to ~10kHz, both amplifiers are active with the DC offset correction active with most of the low frequency gain provided by the chopper amplifier. A 10kHz crossover filter cuts off the low frequency chopper amplifier path leaving the main amplifier active out to the -3dB frequency (3.5MHz GBWP). 13 - OS 45 45 OVERSHOOT (%) OVERSHOOT (%) 2 TIME (µs) TIME (µs) 40 35 +OS 30 25 Vs = ±1.25V AV = 1V RL = 100k VOUT = 100mVpp 20 15 10 10 100 1000 LOAD CAPACITANCE (pF) FIGURE 42. SMALL SIGNAL OVERSHOOT vs LOAD CAPACITANCE, Vs = ±1.25V The key benefits of this architecture for precision applications are rail-to-rail inputs/outputs, high open loop gain, low DC offset and temperature drift, low 1/f noise corner and low input noise voltage. The noise is virtually flat across the frequency range from a few mHz out to 100kHz, except for the narrow noise peak at the amplifier crossover frequency (10kHz). Power Supply Considerations The ISL28134 features a wide supply voltage operating range. The ISL28134 operates on single (+2.25V to +6.0V) or dual (±1.125 to ±3.0V) supplies. Power supply voltages greater than the +6.5V absolute maximum (specified in the “Absolute Maximum Ratings” on page 4) can permanently damage the device. Performance of the device is optimized for supply voltages greater than 2.5V. This makes the ISL28134 ideal for portable 3V battery applications that require the precision performance. It is highly recommended that a 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. FN6957.2 July 25, 2011 ISL28134 Rail-to-rail Input and Output (RRIO) Unlike some amplifiers whose inputs may not be taken to the power supply rails or whose outputs may not drive to the supply rails, the ISL28134 features rail-to-rail inputs and outputs. This allows the amplifier inputs to have a wide common mode range (100mV beyond supply rails) while maintaining high CMRR (135dB) and maximizes the signal to noise ratio of the amplifier by having the VOH and VOL levels be at the V+ and V- rails, respectively. Low Input Voltage Noise Performance In precision applications, the input noise of the front end amplifier is a critical parameter. Combined with a high DC gain to amplify the small input signal, the input noise voltage will result in an output error in the amplifier. A 1µVP-P input noise voltage with an amplifier gain of 10,000V/V will result in an output offset in the range of 10mV, which can be an unacceptable error source. With only 250nVP-P at the input, along with a flat noise response down to 0.1Hz, the ISL28134 can amplify small input signals with minimal output error. The ISL28134 has the lowest input noise voltage compared to other competitor Zero Drift amplifiers with similar supply currents (See Table 1). The overall input referred voltage noise of an amplifier can be expressed as a sum of the input noise voltage, input noise current of the amplifier and the Johnson noise of the gain-setting resistors used. The product of the input noise current and external feedback resistors along with the Johnson noise increases the total output voltage noise as the value of the resistance goes up. For optimizing noise performance, choose lower value feedback resistors to minimize the effect of input noise current. Although the ISL28134 features a very low 200fA/√Hz input noise current, at source impedances >100kΩ, the input referred noise voltage will be dominated by the input current noise. Keep source input impedances under 10kΩ for optimum performance. 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 <10kΩ is recommended. Because the chopper amplifier has charge injection currents at each terminal, the input impedance should be balanced across each input (see Figure 43). The input impedance of the amplifier should be matched between the IN+ and IN- terminals to minimize total input offset current. Input offset currents show up as an additional output offset voltage, as shown in Equation 1: VOSTOT = VOS - RF*IOS If the offset voltage of the amplifier is negative, the input offset currents will add to the total output offset. For a 10,000V/V gain amplifier using 1MΩ feedback resistor, a 500pA total input offset current will have an additional output offset voltage of 0.5mV. By keeping the input impedance low and balanced across the amplifier inputs, the input offset current is kept below 100pA, resulting in an offset voltage 0.1mV or less. RI RF +2.5V VIN RS VOUT + RL RG -2.5V RS//RG = RS//RG FIGURE 43. CIRCUIT IMPLEMENTATION FOR REDUCING INPUT BIAS CURRENTS IN+ and IN- Protection TABLE 1. Part Voltage Noise @ 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 44). 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 14 (EQ. 1) INVIN RIN ESD DIODES IN+ - VOUT + RL V+ V- FIGURE 44. INPUT CURRENT LIMITING FN6957.2 July 25, 2011 ISL28134 Output Phase Reversal ISL28134 SPICE Model Output phase reversal is the unexpected inversion of the amplifier output signal when the inputs exceed the common mode input range. Since the ISL28134 is a rail-to-rail input amplifier, the ISL28134 is specifically designed to prevent output phase reversal within its common mode input range. In fact, the ISL28134 will not phase invert even when the input signals go 0.5V beyond the supply rails (see Figure 37). If input signals are expected to go beyond the rails, it is highly recommended to minimize the forward biased ESD diode current to prevent phase inversion by placing a resistor in series with the input. Figure 46 shows the SPICE model schematic and Figure 47 shows the net list for the SPICE model. The model is a simplified version of the actual device and simulates important AC and DC parameters. AC parameters incorporated into the model are: 1/f and flatband noise voltage, slew rate, CMRR, and gain and phase. The DC parameters are IOS, VOS, total supply current, output voltage swing and output current limit (65mA). The model uses typical parameters given in the “Electrical Specifications” table beginning on page 4. The AVOL is adjusted for 174dB with the dominant pole at 6.5mHz. The CMRR is set at 135dB, f = 200Hz. The input stage models the actual device to present an accurate AC representation. The model is configured for an ambient temperature of +25°C. High Gain, Precision DC-Coupled Amplifier Precision applications that need to amplify signals in the range of a few µV require gain in the order of thousands of V/V to get a good signal to the Analog to Digital Converter (ADC). This can be achieved by using a very high gain amplifier with the appropriate open loop gain and bandwidth. Figures 48 through 61 show the characterization vs. simulation results for the noise voltage, open loop gain phase, closed loop gain vs frequency, CMRR, large signal 3V step response, large signal 1V step response, and output voltage swing VOH / VOL ±2.5V supplies (no phase inversion). In addition to the high gain and bandwidth, it is important that the amplifier have low VOS and temperature drift along with a low input noise voltage. For example, an amplifier with 100µV offset voltage and 0.5uV/°C offset drift configured in a closed loop gain of 10,000V/V would produce an output error of 1V and a 5mV/°C temperature dependent error. Unless offset trimming and temperature compensation techniques are used, this error makes it difficult to resolve the input voltages needed in the precision application. LICENSE STATEMENT The ISL28134 features a low VOS of ±4µV max and a very stable 10nV/°C max temperature drift, which produces an output error of only ±40mV and a temperature error of 0.1mV/°C. With an ultra low input noise of 210nVP-P (0.1Hz to 10Hz) and no 1/f corner frequency, the ISL28134 is capable of amplifying signals in the µV range with high accuracy. For even further DC precision, some feedback filtering CF (see Figure 45) to reduce the noise can be implemented as a total signal stage amplifier. As a method of best practice, the ISL28134 should be impedance matched at the two input terminals. A balancing capacitor of the same value at the non-inverting terminal will result in the amplifier input impedances tracking across frequency. The Licensee may not sell, loan, rent, or license the macro-model, in whole, in part, or in modified form, to anyone outside the Licensee’s company. The Licensee may modify the macro-model to suit his/her specific applications, and the Licensee may make copies of this macro-model for use within their company only. CF 100Ω 1MΩ +2.5V VIN 1MΩ In no event will Intersil be liable for special, collateral, incidental, or consequential damages in connection with or arising out of the use of this macro-model. Intersil reserves the right to make changes to the product and the macro-model without prior notice. VOUT + CF This macro-model is provided “AS IS, WHERE IS, AND WITH NO WARRANTY OF ANY KIND EITHER EXPRESSED OR IMPLIED, INCLUDING BUY NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.” ACL = 10kV/V 100Ω The information in the SPICE model is protected under United States copyright laws. Intersil Corporation hereby grants users of this macro-model, hereto referred to as “Licensee”, a nonexclusive, nontransferable licence to use this model, as long as the Licensee abides by the terms of this agreement. Before using this macro-model, the Licensee should read this license. If the Licensee does not accept these terms, permission to use the model is not granted. RL -2.5V FIGURE 45. HIGH GAIN, PRECISION DC-COUPLED AMPLIFIER 15 FN6957.2 July 25, 2011 DX V1 1e-6 D3 I2 5e-3 En 9 IN- M15 5 EOS DN + - 6 + - 11 D13 16 0 0 V9 R23 5e11 29 CinDif 4.71e-12 Vcm 10 17 GAIN = 113.96e-3 15 0.607 V3 100 16 D2 10 PMOSISIL M10 M11 PMOSISIL NCHANNELMOSFET R22 5e11 10 14 R6 R11 1 R9 12 IOS V4 0.607 240e-12 R3 0.14 0. R4 7 10 Vin- R7 7.5 10 R8 7.5 13 18 R12 G2 1 GAIN = 233.426 V2 1e-6 I1 5e-3 RA2 G2A 1 GAIN = 113.96e-3 DX + - + - VOS 0.2E-6 8 1 + - 28 R5 NCHANNELMOSFET + - DX 80 D1 G1 RA1 GAIN = 233.426 4 M14 1 En R21 3 R10 1e9 + - Vin+ + - R2 7.5004 R1 7.5004 IN+ G1A DX 2 D4 Cin2 10.1e-12 Cin1 10.1e-12 Differential to Single Ended 1st Gain Stage Input Stage Voltage Noise Stage Conversion Stage V+ E2 + - 0 DX V++ D5 L1 G11 G5 3.33E-09 + - R13 GAIN = 68.225E-3 V5 0.607 7346.06E6 GAIN = 177.83E-6 + - 21 D10 R17 GAIN = 879.62E-6 GAIN = 20e-3 1136.85 R15 1.00E-03 D7 DX 23 R19 50 V7 24 VOUT 1.04 Vc Vg D9 10e-12 DX + - G7 DX G3 7.957E-07 + - C4 C2 19 26 27 Vmid 675E-6 ISY D8 G8 + - 7346.06E6 3.33E-09 G6 L2 R18 G10 1136.85 C5 GAIN = 879.62E-6 7.957E-07 10e-12 G9 D11 + - + - GAIN = 20e-3 DX GAIN = 20e-3 GAIN = 177.83E-6 V-E3 2nd Gain Stage Mid Supply ref V D12 G12 GAIN = 20e-3 D6 Common Mode Gain Stage with Zero DY C3 DY 22 R14 GAIN = 68.225E-3 1.04 R16 1.00E-03 + - 20 G4 + - + - + - V6 + - 0.607 V8 25 DX E4 V- + - + - 2nd Pole Stage GAIN = 1 0 Supply Isolation FN6957.2 July 25, 2011 Stage FIGURE 46. SPICE SCHEMATIC Output Stage R20 50 ISL28134 + - GAIN = 1 ISL28134 *ISL28134 Macromodel * *Revision History: * Revision A, LaFontaine June 17th 2011 * Model for Noise, quiescent supply currents, *CMRR135dB f = 200Hz, AVOL 174dB f = *6.5mHz, SR = 1.5V/us, GBWP 3.5MHz. *Copyright 2011 by Intersil Corporation *Refer to data sheet “LICENSE STATEMENT” *Use of this model indicates your acceptance *with the terms and provisions in the License *Statement. * *Intended use: *This Pspice Macromodel is intended to give *typical DC and AC performance *characteristics under a wide range of *external circuit configurations using *compatible simulation platforms – such as *iSim PE. * *Device performance features supported by *this model: *Typical, room temp., nominal power supply *voltages used to produce the following *characteristics: *Open and closed loop I/O impedances, *Open loop gain and phase, *Closed loop bandwidth and frequency *response, *Loading effects on closed loop frequency *response, *Input noise terms including 1/f effects, *Slew rate, Input and Output Headroom limits *to I/O voltage swing, Supply current at *nominal specified supply voltages, *Output current limiting (65mA) * *Device performance features NOT *supported by this model: *Harmonic distortion effects, *Disable operation (if any), *Thermal effects and/or over temperature *parameter variation, *Performance variation vs. supply voltage, *Part to part performance variation due to *normal process parameter spread, *Any performance difference arising from *different packaging, *Load current reflected into the power supply *current. * source ISL28134 * * Connections: +input * | -input * | | +Vsupply * | | | -Vsupply * | | | | output * | | | | | .subckt ISL28134 Vin+ Vin- V+ V- VOUT * *Voltage Noise E_En VIN+ EN 28 0 1 D_D13 29 28 DN V_V9 29 0 0.14 R_R21 28 0 80 * *Input Stage M_M10 11 VIN- 9 9 PMOSISIL M_M11 12 1 10 10 PMOSISIL M_M14 3 1 5 5 NCHANNELMOSFET M_M15 4 VIN- 6 6 NCHANNELMOSFET I_I1 7 V-- DC 5e-3 I_I2 V++ 8 DC 5e-3 I_IOS VIN- 1 DC 240e-12 G_G1A V++ 14 4 3 233.4267 G_G2A V-- 14 11 12 233.4267 V_V1 V++ 2 1e-6 V_V2 13 V-- 1e-6 V_VOS EN 30 0.2E-6 R_R1 3 2 7.5004 R_R2 4 2 7.5004 R_R3 5 7 10 R_R4 7 6 10 R_R5 9 8 10 R_R6 8 10 10 R_R7 13 11 7.5 R_R8 13 12 7.5 R_RA1 14 V++ 1 R_RA2 V-- 14 1 C_CinDif VIN- EN 4.71e-12 C_Cin1 V-- 30 10.1e-12 C_Cin2 V-- VIN- 10.1e-12 * *1st Gain Stage G_G1 V++ 16 15 VMID 113.96e-3 G_G2 V-- 16 15 VMID 113.96e-3 V_V3 17 16 0.607 V_V4 16 18 0.607 D_D1 15 VMID DX D_D2 VMID 15 DX D_D3 17 V++ DX D_D4 V-- 18 DX R_R9 15 14 100 R_R10 15 VMID 1e9 R_R11 16 V++ 1 R_R12 V-- 16 1 * *2nd Gain Stage G_G3 V++ VG 16 VMID 68.225E-3 G_G4 V-- VG 16 VMID 68.225E-3 V_V5 19 VG 0.607 V_V6 VG 20 0.607 D_D5 19 V++ DX D_D6 V-- 20 DX R_R13 VG V++ 7346.06E6 R_R14 V-- VG 7346.06E6 C_C2 VG V++ 3.33E-09 C_C3 V-- VG 3.33E-09 * *Mid supply Ref E_E4 VMID V-- V++ V-- 0.5 * *Supply Isolation Stage E_E2 V++ 0 V+ 0 1 E_E3 V-- 0 V- 0 1 I_ISY V+ V- DC 675E-6 * *Common Mode Gain Stage G_G5 V++ VC VCM VMID 177.83E-6 G_G6 V-- VC VCM VMID 177.83E-6 E_EOS 1 30 VC VMID 1 R_R15 VC 21 1.00E-03 R_R16 22 VC 1.00E-03 R_R22 EN VCM 5e11 R_R23 VCM VIN- 5e11 L_L1 21 V++ 7.957E-07 L_L2 22 V-- 7.957E-07 * *2nd Pole Stage G_G7 V++ 23 VG VMID 879.62E-6 G_G8 V-- 23 VG VMID 879.62E-6 R_R17 23 V++ 1136.85 R_R18 V-- 23 1136.85 C_C4 23 V++ 10e-12 C_C5 V-- 23 10e-12 * *Output Stage G_G9 26 V-- VOUT 23 20e-3 G_G10 27 V-- 23 VOUT 20e-3 G_G11 VOUT V++ V++ 23 20e-3 G_G12 V-- VOUT 23 V-- 20e-3 V_V7 24 VOUT 1.04 V_V8 VOUT 25 1.04 D_D7 23 24 DX D_D8 25 23 DX D_D9 V++ 26 DX D_D10 V++ 27 DX D_D11 V-- 26 DY D_D12 V-- 27 DY R_R19 VOUT V++ 50 R_R20 V-- VOUT 50 * .model pmosisil pmos (kp=16e-3 vto=-0.6 kf=0 af=1) .model NCHANNELMOSFET nmos (kp=3e-3 vto=0.6 kf=0 af=1) .model DN D(KF=6.69e-9 af=1) .MODEL DX D(IS=1E-12 Rs=0.1 kf=0 af=1) .MODEL DY D(IS=1E-15 BV=50 Rs=1 kf=0 af=1) .ends ISL28134 FIGURE 47. SPICE NET LIST 17 FN6957.2 July 25, 2011 ISL28134 Characterization vs Simulation Results 400 VOLTAGE NOISE (nV/√Hz) VOLTAGE NOISE (nV/√Hz) 100 10 100 10 Vs = ±2.5V AV = 1 1 0.001 0.01 Vs = ±2.5V AV = 1 0.1 1 10 100 FREQUENCY (Hz) 1000 10k 1.0 1.0m 100k 10 100 1.0k 10k 100k 140 PHASE GAIN 120 GAIN (dB) / PHASE (°) 80 60 40 20 Vs = ±2.5V RL = 10MΩ 1 10 PHASE 100 80 60 40 20 Vos = 0 0 SIMULATION 0.1 GAIN 120 100 0 100 1k 10k 100k 1M 10M -20 100M 0.1 1 10 100 FREQUENCY (Hz) 80 70 60 50 40 30 20 10 0 90 AV = 10,000 70 Rg = 100, Rf = 100k Vs = ± 2.5V CL = 3.7pF RL = 100k VOUT = 10mVP-P Rg = 1k, Rf = 100k Rg = 10k, Rf = 100k AV = 1 -10 60 50 AV = 100 AV = 10 80 Rg = 10, Rf = 100k AV = 1000 40 30 AV = 10,000 100k 1M 10M 100M 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 20 10 0 Rg = 10k, Rf = 100k AV = 1 -10 Rg = OPEN, Rf = 0 -20 Rg = OPEN, Rf = 0 -20 -30 -30 -40 -40 10 10k FIGURE 51. SIMULATED OPEN-LOOP GAIN, PHASE vs FREQUENCY GAIN (dB) 90 1k FREQUENCY (Hz) FIGURE 50. CHARACTERIZED OPEN-LOOP GAIN, PHASE vs FREQUENCY GAIN (dB) 1.0 FIGURE 49. SIMULATED INPUT NOISE VOLTAGE 140 GAIN (dB) / PHASE (°) 100m FREQUENCY (Hz) FIGURE 48. CHARACTERIZED INPUT NOISE VOLTAGE -20 10m 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FIGURE 52. CHARACTERIZED CLOSED-LOOP GAIN vs FREQUENCY 18 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz) FIGURE 53. SIMULATED CLOSED-LOOP GAIN vs FREQUENCY FN6957.2 July 25, 2011 ISL28134 (Continued) 160 160 140 140 120 120 CMRR (dB) CMRR (dB) Characterization vs Simulation Results 100 80 60 0.1 Vs = ±2.5V VCM = 0V 40 SIMULATION 20 1m 80 60 Vs = ±2.5V VCM = 0V 40 100 10 1k 100k SIMULATION 20 1m 10M 0.1 FREQUENCY (Hz) FIGURE 54. CHARACTERIZED CMRR vs FREQUENCY 4.5 4.5 4.0 4.0 VOLTAGE (V) 2.5 2.0 OUTPUT 3.0 10M INPUT 2.5 2.0 OUTPUT 1.5 1.5 Vs = 5VDC AV = 1V RL = 100k VIN = 1V to 4V 1.0 0.5 Vs = 5VDC AV = 1V RL = 100k VIN = 1V to 4V 1.0 0.5 0 0 0 2 6 4 8 0 10 2 1.2 1.0 1.0 0.8 VOLTAGE (V) INPUT 0.6 OUTPUT Vs = 5VDC AV = 1V RL = 100k VIN = 0.1V to 1.1V 0.2 0 2 6 4 INPUT 0.6 OUTPUT 0.4 Vs = 5VDC AV = 1V RL = 100k VIN = 0.1V to 1.1V 0.2 0 8 TIME (µs) FIGURE 58. CHARACTERIZED SMALL-SIGNAL TRANSIENT RESPONSE 19 10 FIGURE 57. SIMULATED LARGE SIGNAL STEP RESPONSE (3V) 1.2 0.4 8 TIME (µs) FIGURE 56. CHARACTERIZED LARGE SIGNAL STEP RESPONSE (3V) 0.8 6 4 TIME (µs) VOLTAGE (V) 100k 3.5 INPUT 3.0 0 1k FIGURE 55. SIMULATED CMRR vs FREQUENCY 3.5 VOLTAGE (V) 10 FREQUENCY (Hz) 10 0 2 6 4 8 10 TIME (µs) FIGURE 59. SIMULATED SMALL-SIGNAL TRANSIENT RESPONSE FN6957.2 July 25, 2011 ISL28134 Characterization vs Simulation Results (Continued) 4.0 4 VOH = 2.489V 3 2.0 1 VOLTAGE (V) VOLTAGE (V) 2 0 -1 Vs = ±2.5V AV = 1V RL = 1MΩ VIN = -3V to 3V -2 0 VOL = -2.489V Vs = ±2.5V AV = 1V RL = 1MΩ VIN = -4V to 4V -2.0 -3 -4.0 -4 0 5 10 15 TIME (ms) FIGURE 60. CHARACTERIZED NO PHASE INVERSION 20 20 0 0.2 0.4 0.6 0.8 1.0 TIME (ms) FIGURE 61. SIMULATED NO PHASE INVERSION, VOH and VOL FN6957.2 July 25, 2011 ISL28134 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 revision. DATE REVISION CHANGE July 6, 2011 FN6957.2 page 3 - Added Eval board to ordering information. page 10 - Updated plot Input Voltage Noise Density vs Frequency (Changed MIN frequency from 100mHz to 1mHz) page 12 - Updated plot Large Signal Step Response (3V) by changing the Time from 0 to 10 to 0 to 20 page 15 - Added PSPICE model section, includes Schematic, Macromodel and Characterization vs Simulation Results June 8, 2011 FN6957.1 Initial release to web. 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: ISL28134 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 21 FN6957.2 July 25, 2011 ISL28134 Package Outline Drawing M8.15E 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE Rev 0, 08/09 4 4.90 ± 0.10 A DETAIL "A" 0.22 ± 0.03 B 6.0 ± 0.20 3.90 ± 0.10 4 PIN NO.1 ID MARK 5 (0.35) x 45° 4° ± 4° 0.43 ± 0.076 1.27 0.25 M C A B SIDE VIEW “B” TOP VIEW 1.75 MAX 1.45 ± 0.1 0.25 GAUGE PLANE C SEATING PLANE 0.10 C 0.175 ± 0.075 SIDE VIEW “A 0.63 ±0.23 DETAIL "A" (0.60) (1.27) NOTES: (1.50) (5.40) 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.05 4. Dimension does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25mm per side. 5. The pin #1 identifier may be either a mold or mark feature. 6. Reference to JEDEC MS-012. TYPICAL RECOMMENDED LAND PATTERN 22 FN6957.2 July 25, 2011 ISL28134 Package Outline Drawing L6.1.6x1.6 6 LEAD ULTRA THIN DUAL FLAT NO-LEAD COL PLASTIC PACKAGE (UTDFN COL) Rev 1, 11/07 2X 1.00 1.60 A 6 PIN 1 INDEX AREA PIN #1 INDEX AREA 6 B 4X 0.50 1 3 5X 0 . 40 ± 0 . 1 1X 0.5 ±0.1 1.60 (4X) 0.15 4 6 0.10 M C A B TOP VIEW 4 0.25 +0.05 / -0.07 BOTTOM VIEW ( 6X 0 . 25 ) SEE DETAIL "X" ( 1X 0 .70 ) 0 . 55 MAX 0.10 C C BASE PLANE (1.4 ) SIDE VIEW ( 5X 0 . 60 ) C SEATING PLANE 0.08 C 0 . 2 REF 0 . 00 MIN. 0 . 05 MAX. DETAIL "X" ( 4X 0 . 5 ) TYPICAL RECOMMENDED LAND PATTERN NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal ± 0.05 4. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 5. Tiebar shown (if present) is a non-functional feature. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. 23 FN6957.2 July 25, 2011 ISL28134 Package Outline Drawing P5.064A 5 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE Rev 0, 2/10 1.90 0-3° D A 0.08-0.20 5 4 PIN 1 INDEX AREA 2.80 3 1.60 3 0.15 C D 2x 2 5 (0.60) 0.20 C 2x 0.95 SEE DETAIL X B 0.40 ±0.05 3 END VIEW 0.20 M C A-B D TOP VIEW 10° TYP (2 PLCS) 2.90 5 H 0.15 C A-B 2x C 1.45 MAX 1.14 ±0.15 0.10 C SIDE VIEW SEATING PLANE (0.25) GAUGE PLANE 0.45±0.1 0.05-0.15 4 DETAIL "X" (0.60) (1.20) NOTES: (2.40) 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5M-1994. 3. Dimension is exclusive of mold flash, protrusions or gate burrs. 4. Foot length is measured at reference to guage plane. 5. This dimension is measured at Datum “H”. 6. Package conforms to JEDEC MO-178AA. (0.95) (1.90) TYPICAL RECOMMENDED LAND PATTERN 24 FN6957.2 July 25, 2011