ISL28433FVZ

Dual and Quad Micropower Chopper Stabilized, RRIO Operational Amplifiers ISL28233, ISL28433 The ISL28233 and ISL28433 are dual and quad micropower, chopper stabilized operational amplifiers that are optimized for single and dual supply operation from 1.65V to 6.0V and ±0.825V to ±3.0V. Their low supply current of 18µA and wide input range enable the ISL28233, ISL28433 to be an excellent general purpose op amp for a wide range of applications. The ISL28233 and ISL28433 are ideal for handheld devices that operate off 2 AA or single Li-ion batteries. The ISL28233 is available in 8 Ld MSOP and 8 Ld SOIC packages. The ISL28433 is available in 14 Ld TSSOP, 14 Ld SOIC and 14 Ld 3x4mm TDFN packages. All devices operate over the temperature range of -40°C to +125°C. ISL28233, ISL28433 Features • Low Input Offset Voltage . . . . . . . . . . . . . 6µV, Max. • Low Offset Drift . . . . . . . . . . . . . . 0.05µV/°C, Max. • Quiescent Current (Per Amplifier) . . . . . . 18µA, Typ. • Single Supply Range . . . . . . . . . . .+1.65V to +6.0V • Dual Supply Range . . . . . . . . . . . ±0.825V to ±3.0V • Low Noise (0.01Hz to 10Hz) . . . . . . . . 1.0µVP-P, Typ. • Rail-to-Rail Inputs and Output • Input Bias Current . . . . . . . . . . . . . . . 180pA, Max. • Operating Temperature Range . . . . -40°C to +125°C Applications • Bi-Directional Current Sense • Temperature Measurement • Medical Equipment • Electronic Weigh Scales • Precision/Strain Gauge Sensor • Precision Regulation • Low Ohmic Current Sense • High Gain Analog Front Ends Typical Application I-SENSE+ V+ +1.65V TO +6.0V VREF VOS vs Temperature 4 INPUT OFFSET VOLTAGE (µV) 3 2 1 0 -1 -2 -3 -4 -50 -25 0 25 50 75 100 125 499k 4.99k + 0.1 4.99k V+ V499k VSENSE OUT I-SENSE- GND BI-DIRECTIONAL CURRENT SENSE AMPLIFIER TEMPERATURE (°C) August 25, 2010 FN7692.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL28233, ISL28433 Ordering Information PART NUMBER (Notes 2, 3) ISL28233FUZ ISL28233FUZ-T7 (Note 1) ISL28233FUZ-T7A (Note 1) ISL28233FBZ ISL28233FBZ-T7 (Note 1) ISL28233FBZ-T7A (Note 1) ISL28433FBZ ISL28433FBZ-T7 (Note 1) ISL28433FBZ-T7A (Note 1) ISL28433FVZ ISL28433FVZ-T7A (Note 1) ISL28433FVZ-T13 (Note 1) Coming Soon ISL28433FRTZ Coming Soon ISL28433FRTZ-T13 (Note 1) NOTES: 1. Please refer to TB347 for details on reel specifications. 2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL28233, ISL28433. For more information on MSL please see techbrief TB363. PART MARKING 8233Z 8233Z 8233Z 28233 FBZ 28233 FBZ 28233 FBZ 28433 FBZ 28433 FBZ 28433 FBZ 28433 FVZ 28433 FVZ 28433 FVZ TBD TBD PACKAGE (Pb-Free) 8 Ld MSOP 8 Ld MSOP 8 Ld MSOP 8 Ld SOIC 8 Ld SOIC 8 Ld SOIC 14 Ld SOIC 14 Ld SOIC 14 Ld SOIC 14 Ld TSSOP 14 Ld TSSOP 14 Ld TSSOP 14 Ld 3x4 mm TDFN 14 Ld 3x4 mm TDFN PKG. DWG. # M8.118A M8.118A M8.118A M8.15E M8.15E M8.15E MDP0027 MDP0027 MDP0027 MDP0044 MDP0044 MDP0044 TBD TBD Pin Configurations ISL28233 (8 LD MSOP, SOIC) TOP VIEW OUT_A 1 IN-_A 2 IN+_A 3 V- 4 -+ +8 V+ 7 OUT_B 6 IN-_B 5 IN+_B ISL28433 (14 LD SOIC) TOP VIEW OUT_A 1 IN-_A 2 IN+_A 3 V+ 4 IN+_B 5 IN-_B 6 OUT_B 7 -+ +-+ +14 OUT_D 13 IN-_D 12 IN+_D 11 V10 IN+_C 9 IN-_C 8 OUT_C ISL28433 (14 LD TDFN) TOP VIEW OUT_A 1 IN-_A 2 IN+_A 3 V+ 4 IN+_B 5 IN-_B 6 OUT_B 7 -+ +-+ +14 OUT_D 13 IN-_D 12 IN+_D 11 V10 IN+_C 9 IN-_C 8 OUT_C 2 FN7692.0 August 25, 2010 ISL28233, ISL28433 Pin Configurations (Continued) ISL28433 (14 LD TSSOP) TOP VIEW OUT_A 1 IN-_A 2 IN+_A 3 V+ 4 IN+_B 5 IN-_B 6 OUT_B 7 -+ +-+ +14 OUT_D 13 IN-_D 12 IN+_D 11 V10 IN+_C 9 IN-_C 8 OUT_C Pin Descriptions ISL28233 ISL28433 PIN (8 LD MSOP, SOIC) (14 LD TSSOP, SOIC, TDFN) NAME 3 5 3 5 10 12 FUNCTION EQUIVALENT CIRCUIT V+ + IN+ + - IN+_A Non-inverting input IN+_B IN+_C IN+_D INV- CLOCK GEN + DRIVERS Circuit 1 4 2 6 1 7 - 11 2 6 9 13 1 7 8 14 VIN-_A IN-_B IN-_C IN-_D Negative supply Inverting input (See Circuit 1) OUT_A Output OUT_B OUT_C OUT_D V+ OUT VCircuit 2 8 - 4 PD V+ NC Positive supply Thermal Pad Thermal Pad. Connect to most negative supply. TDFN package only. 3 FN7692.0 August 25, 2010 ISL28233, ISL28433 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) . . . . . . . . . . . . . . . .±3.0V ESD Tolerance Human Body Model (Tested per JESD22-A114F) . . . 4000V Machine Model (Tested per JESD22-A115B) . . . . . . . 400V Charged Device Model (Tested per JESD22-C110D) . 2000V Latch-Up (Tested per JESD78B) . . . . . . . . . . . . . . . +125°C Thermal Information Thermal Resistance (Typical) θJA (°C/W) θJC (°C/W) 14 Ld TSSOP (Notes 4, 6) . . . . . . . 110 40 14 Ld SOIC (Notes 4, 6) . . . . . . . . 75 47 14 Ld TDFN (Notes 4, 5) . . . . . . . . TBD TBD 8 Ld MSOP (Notes 4, 6) . . . . . . . . 180 65 8 Ld SOIC (Notes 4, 6) . . . . . . . . . 125 90 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 Temperature Range . . . . . . . . . . . . . . . . . -40°C to +125°C 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: 4. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 5. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside. 6. For θJC, the “case temp” location is taken at the package top center. Electrical Specifications V+ = 5V, V- = 0V, VCM = 2.5V, TA = +25°C, RL = 10kΩ, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +125°C. CONDITIONS MIN (Note 7) TYP MAX (Note 7) UNIT PARAMETER DC SPECIFICATIONS VOS DESCRIPTION Input Offset Voltage (Note 8) T = -40°C to +125°C -6 -11 -0.05 - ±2 0.01 10 0.11 0.49 125 138 4.981 18 174 18 - 6 11 0.05 180 600 5.1 35 6.0 25 35 µV µV µV/°C pA pA/°C pA pA pA/°C V dB dB dB dB V mV dB V µA µA TCVOS IOS TCIOS IB Input Offset Voltage Temperature Coefficient Input Offset Current Input Offset Current Temperature Coefficient Input Bias Current T = -40°C to +125°C T = -40°C to +85°C T = -40°C to +85°C T = -40°C to +125°C -180 -600 -0.1 118 115 TCIB CMIR CMRR Input Bias Current Temperature Coefficient T = -40°C to +85°C V+ = 5.0V, V- = 0V Guaranteed by CMRR Common Mode Rejection Ratio VCM = -0.1V to 5.1V PSRR Power Supply Rejection Ratio Vs = 1.65V to 6.0V 110 110 VOH VOL AOL V+ IS Output Voltage, High Output Voltage, Low Open Loop Gain Supply Voltage Supply Current, Per Amplifier RL = 1MΩ Guaranteed by PSRR RL = OPEN 4.965 1.65 - 4 FN7692.0 August 25, 2010 ISL28233, ISL28433 Electrical Specifications V+ = 5V, V- = 0V, VCM = 2.5V, TA = +25°C, RL = 10kΩ, unless otherwise specified. Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued) CONDITIONS MIN (Note 7) 13 -26 TYP 17 -19 MAX (Note 7) 26 -13 UNIT mA mA PARAMETER ISC+ ISC- DESCRIPTION Output Source Short Circuit Current RL = Short to VOutput Sink Short Circuit Current RL = Short to V+ AC SPECIFICATIONS GBWP eN VP-P eN iN Gain Bandwidth Product Peak-to-Peak Input Noise Voltage Input Noise Voltage Density Input Noise Current Density AV = 100, RF = 100kΩ, RG = 1kΩ, RL = 10kΩ to VCM f = 0.01Hz to 10Hz f = 1kHz f = 1kHz f = 10Hz Cin Differential Input Capacitance Common Mode Input Capacitance 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 Output Overload Recovery Time, Recovery to 90% of output saturation AV = +1, VOUT = 0.1VP-P, RF = 0Ω, RL = 10kΩ, CL = 1.2pF AV = +1, VOUT = 2VP-P, RF = 0Ω, RL = 10kΩ, CL = 1.2pF AV = +1, RF = 0Ω, RL = 10kΩ, CL = 1.2pF AV = +2, RF = 10kΩ, RL = Open, CL = 3.7pF VOUT = 1V to 4V, RL = 10kΩ 0.2 0.1 1.1 1.1 20 30 35 10.5 V/µs V/µs µs µs µs µs µs µs f = 1MHz 400 1.0 65 72 79 1.6 1.12 kHz µVP-P nV/√(Hz) fA/√(Hz) fA/√(Hz) pF pF NOTES: 7. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. 8. Limits established by characterization. VOS continuous correction circuit functionality 100% production tested. 5 FN7692.0 August 25, 2010 ISL28233, ISL28433 Typical Performance Curves n V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, T = +25°C, unless otherwise specified. 4 INPUT OFFSET VOLTAGE (µV) 3 2 1 0 -1 -2 -3 -4 -50 -25 0 VS = ±0.825V VIN = 0V RL = OPEN 25 50 75 TEMPERATURE (°C) 100 125 4 INPUT OFFSET VOLTAGE (µV) 3 2 1 0 -1 -2 -3 -4 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 SUPPLY VOLTAGE (V) FIGURE 1. VOS vs SUPPLY VOLTAGE FIGURE 2. VOS vs TEMPERATURE 4 INPUT OFFSET VOLTAGE (µV) INPUT BIAS CURRENT (pA) 3 2 1 0 -1 -2 -3 -4 -50 -25 0 25 50 75 TEMPERATURE (°C) VS = ±2.5V VIN = 0V RL = OPEN 100 125 400 300 200 VS = ±2.5V VS = ±0.825V 100 0 -100 -50 -25 0 25 50 75 100 125 TEMPERATURE (°C) FIGURE 3. VOS vs TEMPERATURE FIGURE 4. IB+ vs TEMPERATURE 400 INPUT OFFSET CURRENT (pA) INPUT BIAS CURRENT (pA) 100 VS = ±2.5V VS = ±0.825V 0 300 50 200 VS = ±2.5V 100 VS = ±0.825V -50 0 -100 -100 -50 -25 0 25 50 75 100 125 -150 -50 -25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) FIGURE 5. IB- vs TEMPERATURE FIGURE 6. IOS vs TEMPERATURE 6 FN7692.0 August 25, 2010 ISL28233, ISL28433 Typical Performance Curves 40 SUPPLY CURRENT (µA) 35 30 25 20 15 10 -50 VS = ±0.825V PER AMPLIFIER VS = ±2.5V V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, T = +25°C, unless otherwise specified. (Continued) PEAK TO PEAK NOISE VOLTAGE (nV) 1000 VS = 5V 800 RL = 100k CL = 3.7pF 600 Rg = 10, Rf = 100k AV = 10,000 400 200 0 -200 -400 -600 -800 10 20 30 40 50 60 TIME (s) 70 80 90 100 -25 0 25 50 75 100 125 TEMPERATURE (°C) -1000 0.1 FIGURE 7. SUPPLY CURRENT vs TEMPERATURE FIGURE 8. INPUT NOISE VOLTAGE 0.01Hz TO 10Hz INPUT NOISE VOLTAGE (nV/√Hz) INPUT NOISE CURRENT (pA/√Hz) 1000 VS = 5V AV = 1 1.0 VS = 5V AV = 1 100 0.1 10 0.001 0.01 0.1 1 10 100 FREQUENCY (Hz) 1k 10k 100k 0.01 0.001 0.01 0.1 1 10 100 1k 10k 100k FREQUENCY (Hz) FIGURE 9. INPUT NOISE VOLTAGE DENSITY vs FREQUENCY FIGURE 10. INPUT NOISE CURRENT DENSITY vs FREQUENCY OPEN LOOP GAIN (dB)/PHASE (°) 150 PHASE 100 50 0 -50 RL = 10k CL = 100pF SIMULATION 10 100 1k 10k 100k 1M 10M GAIN OPEN LOOP GAIN (dB)/PHASE (°) 200 200 150 100 50 0 -50 RL = 10M CL = 100pF SIMULATION 10M GAIN PHASE -100 0.1m 1m 10m 100m 1 FREQUENCY (Hz) -100 0.1m 1m 10m 100m 1 10 100 1k 10k 100k 1M FREQUENCY (Hz) FIGURE 11. FREQUENCY RESPONSE vs OPEN LOOP GAIN, RL = 10kΩ FIGURE 12. FREQUENCY RESPONSE vs OPEN LOOP GAIN, RL = 10MΩ 7 FN7692.0 August 25, 2010 ISL28233, ISL28433 Typical Performance Curves 1 0 NORMALIZED GAIN (dB) -1 -2 -3 -4 -5 -6 -7 -8 -9 100 VS = ±0.8V CL = 3.7pF AV = +1 VOUT = 10mVP-P 1k 10k 100k FREQUENCY (Hz) 1M RL = 1k RL = 10k RL = 49.9k V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, T = +25°C, unless otherwise specified. (Continued) 1 NORMALIZED GAIN (dB) RL = 100k RL = 1k RL = 10k RL = 49.9k VS = ±2.5V CL = 3.7pF AV = +1 VOUT = 10mVP-P 1k 10k 100k FREQUENCY (Hz) 1M 10M RL = OPEN RL = 100k RL = OPEN 0 -1 -2 -3 -4 -5 -6 -7 -8 10M -9 100 FIGURE 13. GAIN vs FREQUENCY vs RL, VS = ±0.8V FIGURE 14. GAIN vs FREQUENCY vs RL, VS = ±2.5V 10 9 8 7 GAIN (dB) 6 5 4 3 2 1 VS = ±2.5V RL = 100k CL = 3.7pF AV = +2 VOUT = 10mVP-P 1k 10k 100k FREQUENCY (Hz) NORMALIZED GAIN (dB) Rf = Rg = 1k Rf = Rg = 10k 1 0 -1 -2 -3 -4 -5 -6 -7 -8 1M 10M -9 100 1k VOUT = 500mV VOUT = 250mV VOUT = 100mV VOUT = 10mV 10k 100k FREQUENCY (Hz) VS = ±2.5V RL = OPEN CL = 3.7pF AV = 1 1M 10M VOUT = 1V Rf = Rg = 100k 0 100 FIGURE 15. GAIN vs FREQUENCY vs FEEDBACK RESISTOR VALUES Rf/Rg FIGURE 16. GAIN vs FREQUENCY vs VOUT, RL = OPEN 70 60 50 GAIN (dB) 40 30 20 10 0 AV = 1 Rg = OPEN, Rf = 0 100 1k 10k 100k FREQUENCY (Hz) 1M 10M AV = 10 Rg = 10k, Rf = 100k AV = 100 Rg = 1k, Rf = 100k V+ = 5V CL = 3.7pF RL = 100k VOUT = 10mVP-P AV = 1000 Rg = 100, Rf = 100k NORMALIZED GAIN (dB) 1 0 -1 -2 -3 -4 -5 -6 -7 -8 RL = 100k CL = 3.7pF AV = +1 VOUT = 10mVP-P 1k 10k 100k FREQUENCY (Hz) 1M 10M VS = ±0.7V VS = ±0.8V VS= ±1.5V VS = ±2.75V -10 10 -9 100 FIGURE 17. FREQUENCY RESPONSE vs CLOSED LOOP GAIN FIGURE 18. GAIN vs FREQUENCY vs SUPPLY VOLTAGE 8 FN7692.0 August 25, 2010 ISL28233, ISL28433 Typical Performance Curves 8 6 NORMALIZED GAIN (dB) 4 2 0 -2 -4 CL = 104pF CL = 51pF CL = 3.7pF 10k 100k 1M CL = 824pF CL = 474pF CL = 224pF V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, T = +25°C, unless otherwise specified. (Continued) 20 0 -20 CMRR (dB) -40 -60 -80 VS = ±2.5V RL = 100k AV = +1 VCM = 1VP-P SIMULATION VS = ±2.5V -6 R = 100k L -8 AV = +1 VOUT = 10mVP-P -10 100 1k -100 -120 10M -140 100 1k 10k 100k 1M 10M FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 19. GAIN vs FREQUENCY vs CL FIGURE 20. CMRR vs FREQUENCY, VS = ±2.5V 0 -10 -20 -30 PSRR (dB) -40 -50 -60 -70 -80 -90 -100 10 100 1k 10k 100k FREQUENCY (Hz) PSRR+ VS = ±0.8V RL = 100k CL = 16.3pF AV = +1 VCM = 1VP-P 1M 10M PSRRPSRR (dB) 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 10 100 PSRRPSRR+ VS = ±2.5V RL = 100k CL = 16.3pF AV = +1 VCM = 1VP-P 1M 10M 1k 10k 100k FREQUENCY (Hz) FIGURE 21. PSRR vs FREQUENCY, VS = ±0.8V FIGURE 22. PSRR vs FREQUENCY, VS = ±2.5V 155 150 CMRR (dB) 145 PSRR (dB) VS = ±2.5V VCM = ±2.6V -25 0 25 50 75 100 125 160 150 140 130 120 110 100 -50 VS = 1.65V to 6.0V 140 135 130 -50 -25 0 TEMPERATURE (°C) 25 50 75 TEMPERATURE (°C) 100 125 FIGURE 23. CMRR vs TEMPERATURE FIGURE 24. PSRR vs TEMPERATURE 9 FN7692.0 August 25, 2010 ISL28233, ISL28433 Typical Performance Curves 5.0 4.5 4.0 3.5 SIGNAL (V) 3.0 2.5 2.0 1.5 1.0 0.5 0 0 50 100 V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, T = +25°C, unless otherwise specified. (Continued) RL = 100k CL = 3.7pF AV = 1 VOUT = 4VP-P 150 200 250 TIME (µs) 300 350 400 FIGURE 25. LARGE SIGNAL STEP RESPONSE (4V) 1.2 1.0 SIGNAL (V) 0.8 0.6 0.4 0.2 0 RL = 100k CL = 3.7pF AV = 1 VOUT = 1VP-P 0.14 0.12 0.10 SIGNAL (V) 0.08 0.06 0.04 0.02 0 10 20 30 40 50 60 TIME (µs) 70 80 90 100 0 0 5 10 15 20 25 TIME (µs) 30 35 40 RL = 100k CL = 3.7pF AV = 1 VOUT = 100mVP-P FIGURE 26. LARGE SIGNAL STEP RESPONSE (1V) FIGURE 27. SMALL SIGNAL STEP RESPONSE (100mV) 5.000 4.995 VOH (V) VS =5V RL = 10kΩ VOL (mV) 40 35 VS = 5V RL = 10kΩ 4.990 30 25 20 15 -50 4.985 4.980 4.975 -50 -25 0 25 50 75 TEMPERATURE (°C) 100 125 -25 0 25 50 75 TEMPERATURE (°C) 100 125 FIGURE 28. VOH vs TEMPERATURE FIGURE 29. VOL vs TEMPERATURE 10 FN7692.0 August 25, 2010 ISL28233, ISL28433 Typical Performance Curves -20 -40 Vs = ±0.8V RL = OPEN CL = 3.7pF AV = 1 VOUT = 1VP-P V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, T = +25°C, unless otherwise specified. (Continued) -20 -40 Vs = ±2.5V RL = OPEN CL = 3.7pF AV = 1 VOUT = 1VP-P CROSSTALK (dB) CROSSTALK (dB) 10k 100k FREQUENCY (Hz) 1M -60 -80 -100 -60 -80 -100 -120 -140 1k -120 -140 1k 10k 100k FREQUENCY (Hz) 1M FIGURE 30. CROSSTALK vs FREQUENCY, VS = ±0.8V FIGURE 31. CROSSTALK vs FREQUENCY, VS = ±2.5V 12 TA = -40°C to +85°C 10 FREQUENCY (UNITS) FREQUENCY (UNITS) 8 6 4 2 0 14 TA = -40°C to +85°C 12 10 8 6 4 2 4 0.04 0.08 0.12 0.24 0.28 0.32 0.16 0.20 0. 42 0. 46 0. 50 0. 54 0 0. 58 0. 62 0. 66 -0.0 TCIOS (pA/°C) TCIB (pA/°C) FIGURE 32. TCIOS HISTOGRAM FIGURE 33. TCIB HISTOGRAM 35 FREQUENCY (UNITS) 30 25 20 15 10 5 0 TA = -40°C to +125°C INPUT OFFSET CURRENT (pA) 40 40 30 20 10 0 -10 -20 -30 -40 -0.5 0.5 1.5 2.5 3.5 4.5 COMMON MODE VOLTAGE (V) 5.5 -40-35-30-25 -20-15-10 -5 0 5 10 15 20 25 30 35 TCVOS (nV/°C) FIGURE 34. TCVOS HISTOGRAM FIGURE 35. IOS vs VCM 11 FN7692.0 August 25, 2010 0. 70 0 ISL28233, ISL28433 Typical Performance Curves 40 30 20 10 0 -10 -20 -0.5 V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, T = +25°C, unless otherwise specified. (Continued) 20 15 IB- BIAS CURRENT (pA) 10 5 0 -5 -10 -15 IB+ BIAS CURRENT (pA) 0.5 1.5 2.5 3.5 4.5 5.5 -20 -0.5 0.5 1.5 2.5 3.5 4.5 5.5 COMMON MODE VOLTAGE (V) COMMON MODE VOLTAGE (V) FIGURE 36. IB+ vs VCM FIGURE 37. IB- vs VCM 6 INPUT OFFSET VOLTAGE (µV) 4 2 0 -2 -4 -6 -0.5 0.5 1.5 2.5 3.5 4.5 5.5 COMMON MODE VOLTAGE (V) FIGURE 38. VOS vs VCM MAIN AMPLIFIER 5kHz CROSSOVER FILTER ININ+ CHOPPER STABILIZED DC OFFSET CORRECTION VOUT FIGURE 39. ISL28233, ISL28433 FUNCTIONAL BLOCK DIAGRAM 12 FN7692.0 August 25, 2010 ISL28233, ISL28433 Applications Information Functional Description The ISL28233 and ISL28433 use a proprietary chopper-stabilized technique (see Figure 39) that combines a 400kHz main amplifier with a very high open loop gain (174dB) chopper amplifier to achieve very low offset voltage and drift (2µV, 0.01µV/°C typical) while consuming only 18µA of supply current per channel. 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 ~5kHz, both amplifiers are active with DC offset correction and most of the low frequency gain is provided by the chopper amplifier. A 5kHz crossover filter cuts off the low frequency amplifier path leaving the main amplifier active out to the 400kHz gain-bandwidth product of the device. The key benefits of this architecture for precision applications are very high open loop gain, very low DC offset, and low 1/f noise. The noise is virtually flat across the frequency range from a few millihertz out to 100kHz, except for the narrow noise peak at the amplifier crossover frequency (5kHz). Layout Guidelines for High Impedance Inputs To achieve the maximum performance of the high input impedance and low offset voltage of the ISL28233 and ISL28433 amplifiers, care should be taken in the circuit board layout. The PC board surface must remain clean and free of moisture to avoid leakage currents between adjacent traces. Surface coating of the circuit board will reduce surface moisture and provide a humidity barrier, reducing parasitic resistance on the board. High Gain, Precision DC-Coupled Amplifier The circuit in Figure 41 implements a single-stage DC-coupled amplifier with an input DC sensitivity of under 100nV that is only possible using a low VOS amplifier with high open loop gain. High gain DC amplifiers operating from low voltage supplies are not practical using typical low offset precision op amps. For example, a typical precision amplifier in a gain of 10kV/V with a ±100µV VOS and offset drift 0.5µV/°C of a low offset op amp would produce a DC error of >1V with an additional 5mV/°C of temperature dependent error making it difficult to resolve DC input voltage changes in the mV range. The ±6µV max VOS and 0.05µV/°C max temperature drift of the ISL28233, ISL28433 produces a temperature stable maximum DC output error of only ±60mV with a maximum output temperature drift of 0.5mV/°C. The additional benefit of a very low 1/f noise corner frequency and some feedback filtering enables DC voltages and voltage fluctuations well below 100nV to be easily detected with a simple single stage amplifier. CF 0.018µF 1MΩ, +2.5V VIN 100Ω 1MΩ + 100Ω -2.5V ACL = 10kV/V RL VOUT Rail-to-rail Input and Output (RRIO) The RRIO CMOS amplifier uses parallel input PMOS and NMOS that enable the inputs to swing 100mV beyond either supply rail. The inverting and non-inverting inputs do not have back-to-back input clamp diodes and are capable of maintaining high input impedance at high differential input voltages. This is effective in eliminating output distortion caused by high slew-rate input signals. The output stage uses common source connected PMOS and NMOS devices to achieve rail-to-rail output drive capability with 17mA current limit and the capability to swing to within 20mV of either rail while driving a 10kΩ load. IN+ and IN- Protection All input terminals have internal ESD protection diodes to both positive and negative supply rails, limiting the input voltage to within one diode beyond the supply rails. For applications where either input is expected to exceed the rails by 0.5V, an external series resistor must be used to ensure the input currents never exceed 20mA (see Figure 40). VIN RIN + RL FIGURE 41. HIGH GAIN, PRECISION DC-COUPLED AMPLIFIER ISL28233, ISL28433 SPICE Model VOUT FIGURE 40. INPUT CURRENT LIMITING Figure 42 shows the SPICE model schematic and Figure 43 shows the net list for the ISL28233, ISL28433 SPICE model. The model is a simplified version of the actual device and simulates important parameters such as noise, Slew Rate, Gain and Phase. The model uses typical parameters from the “Electrical Specifications Table” on page 4. The poles and zeroes in the model were determined from the actual open and closed-loop gain and phase response. This enables the model to 13 FN7692.0 August 25, 2010 ISL28233, ISL28433 present an accurate AC representation of the actual device. The model is configured for ambient temperature of +25°C. Figures 44 through 51 show the characterization vs simulation results for the Noise Density, Frequency Response vs Close Loop Gain, Gain vs Frequency vs CL and Large Signal Step Response (4V). LICENSE STATEMENT The information in this SPICE model is protected under the 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. 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. 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.” 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. 14 FN7692.0 August 25, 2010 ISL28233, ISL28433 V16 V15 Dn2 Dn1 I2 7 R22 + + - R21 I1 R1 R2 Vin+ En Cin1 M1 M2 Cin2 13 VinR3 R4 12 4 Voltage Noise Input Stage 7 + G2 V4 13 R6 D2 + G4 V6 R8 C1 D4 7 VV3 12 G1 R5 V3 D1 G3 R7 C2 D3 V5 16 - + 4 + 4 Gain Stage SR Limit & First Pole 7 + G5 R11 VV3 R12 L1 + G8 R14 C3 D7 D8 + G10 V+ R16 Vout 16 R10 E1 + + 4 G5 + R9 L2 G7 + R13 C4 G9 + D6 D5 G10 + G11 + R15 VZero/Pole Pole Output Stage FIGURE 42. SPICE CIRCUIT SCHEMATIC 15 FN7692.0 August 25, 2010 ISL28233, ISL28433 * ISL28233, ISL28433 Macromodel * Revision B, April 2009 * AC characteristics, Voltage Noise *Copyright 2009 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. * Connections: +input * | -input * | | +Vsupply * | | | -Vsupply * | | | | output * | | | | | .subckt ISL28233 3 2 7 4 6 * *Voltage Noise D_DN1 102 101 DN D_DN2 104 103 DN R_R21 0 101 120k R_R22 0 103 120k E_EN 8 3 101 103 1 V_V15 102 0 0.1Vdc V_V16 104 0 0.1Vdc * *Input Stage C_Cin1 8 0 0.4p C_Cin2 2 0 2.0p R_R1 9 10 10 R_R2 10 11 10 R_R3 4 12 100 R_R4 4 13 100 M_M1 12 8 9 9 pmosisil + L=50u + W=50u M_M2 13 2 11 11 pmosisil + L=50u + W=50u I_I1 4 7 DC 92uA I_I2 7 10 DC 100uA * *Gain stage G_G1 4 VV2 13 12 0.0002 G_G2 7 VV2 13 12 0.0002 R_R5 4 VV2 1.3Meg R_R6 VV2 7 1.3Meg D_D1 4 14 DX D_D2 15 7 DX V_V3 VV2 14 0.7Vdc V_V4 15 VV2 0.7Vdc * *SR limit first pole G_G3 4 VV3 VV2 16 1 G_G4 7 VV3 VV2 16 1 R_R7 4 VV3 1meg R_R8 VV3 7 1meg C_C1 VV3 7 12u C_C2 4 VV3 12u D_D3 4 17 DX D_D4 18 7 DX V_V5 VV3 17 0.7Vdc V_V6 18 VV3 0.7Vdc * *Zero/Pole E_E1 16 4 7 4 0.5 G_G5 4 VV4 VV3 16 0.000001 G_G6 7 VV4 VV3 16 0.000001 L_L1 20 7 0.3H R_R12 20 7 2.5meg R_R11 VV4 20 1meg L_L2 4 19 0.3H R_R9 4 19 2.5meg R_R10 19 VV4 1meg *Pole G_G7 4 VV5 VV4 16 0.000001 G_G8 7 VV5 VV4 16 0.000001 C_C3 VV5 7 0.12p C_C4 4 VV5 0.12p R_R13 4 VV5 1meg R_R14 VV5 7 1meg * *Output Stage G_G9 21 4 6 VV5 0.0000125 G_G10 22 4 VV5 6 0.0000125 D_D5 4 21 DY D_D6 4 22 DY D_D7 7 21 DX D_D8 7 22 DX R_R15 4 6 8k R_R16 6 7 8k G_G11 6 4 VV5 4 -0.000125 G_G12 7 6 7 VV5 -0.000125 * .model pmosisil pmos (kp=16e-3 vto=10m) .model DN D(KF=6.4E-16 AF=1) .MODEL DX D(IS=1E-18 Rs=1) .MODEL DY D(IS=1E-15 BV=50 Rs=1) .ends ISL28233 FIGURE 43. SPICE NET LIST v 16 FN7692.0 August 25, 2010 ISL28233, ISL28433 Characterization vs Simulation Results INPUT NOISE VOLTAGE (nV/√Hz V+ = 5V AV = 1 INPUT NOISE VOLTAGE (nV/√Hz 1000 1000 V+ = 5V AV = 1 100 100 10 0.001 0.01 0.1 1 10 100 1k 10k 100k 10 0.1 1 10 100 1k 10k 100k FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 44. CHARACTERIZED INPUT NOISE VOLTAGE DENSITY vs FREQUENCY FIGURE 45. SIMULATED INPUT NOISE VOLTAGE DENSITY vs FREQUENCY 70 60 50 GAIN (dB) AV = 1000 70 Rg = 100, Rf = 100k 60 50 GAIN (dB) 40 30 20 10 0 AV = 1000 Rg = 100, Rf = 100k 40 30 20 10 0 AV = 100 Rg = 1k, Rf = 100k V+ = 5V CL = 3.7pF RL = 100k VOUT = 10mVP-P AV = 100 Rg = 1k, Rf = 100k Rg = 10k, Rf = 100k AV = 10 Rg = 10k, Rf = 100k AV = 1 Rg = OPEN, Rf = 0 100 AV = 10 AV = 1 Rg = 10M Rf = 1 100 1k 10k 100k FREQUENCY (Hz) 1M 10M -10 10 1k 10k 100k FREQUENCY (Hz) 1M 10M -10 10 FIGURE 46. CHARACTERIZED FREQUENCY RESPONSE vs CLOSED LOOP GAIN FIGURE 47. SIMULATED FREQUENCY RESPONSE vs CLOSED LOOP GAIN 8 NORMALIZED GAIN (dB) 6 4 2 0 -2 -4 NORMALIZED GAIN (dB) CL CL = 824pF 824pF CL = 474pF CL = 224pF 8 6 4 2 0 -2 -4 -6 -8 -10 100 1k CL = 824pF CL = 474pF CL CL = 224pF 224pF V+ = 5V CL = 104pF -6 RL = 100k CL = 51pF AV = +1 -8 V OUT = 10mVP-P CL = 3.7pF 1k 10k 100k FREQUENCY (Hz) 1M 10M CL = 3.7pF 10k 100k FREQUENCY (Hz) 1M 10M -10 100 FIGURE 48. CHARACTERIZED GAIN vs FREQUENCY vs CL FIGURE 49. SIMULATED GAIN vs FREQUENCY vs CL 17 FN7692.0 August 25, 2010 ISL28233, ISL28433 Characterization vs Simulation Results (Continued) 5.0 4.5 LARGE SIGNAL (V) LARGE SIGNAL (V) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 50 100 150 200 250 300 350 400 V+ = 5V RL = 100k CL = 3.7pF AV = 1 VOUT = 4VP-P 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 50 100 150 200 250 300 350 400 VIN VOUT TIME (µs) TIME (µs) FIGURE 50. CHARACTERIZED LARGE SIGNAL STEP RESPONSE (4V) FIGURE 51. SIMULATED LARGE SIGNAL STEP RESPONSE (4V) 18 FN7692.0 August 25, 2010 ISL28233, ISL28433 Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest Rev. DATE 8/25/10 REVISION FN7692.0 Initial Release. CHANGE 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: ISL28233, ISL28433 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 19 FN7692.0 August 25, 2010 ISL28233, ISL28433 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° 1.27 0.43 ± 0.076 0.25 M C A B 4° ± 4° SIDE VIEW “B” TOP VIEW 1.75 MAX 1.45 ± 0.1 0.25 0.175 ± 0.075 GAUGE PLANE C SEATING PLANE 0.10 C SIDE VIEW “A 0.63 ±0.23 DETAIL "A" (1.27) (0.60) NOTES: (1.50) 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. Unless otherwise specified, tolerance : Decimal ± 0.05 Dimension does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25mm per side. 5. 6. The pin #1 identifier may be either a mold or mark feature. Reference to JEDEC MS-012. 2. (5.40) 3. 4. TYPICAL RECOMMENDED LAND PATTERN 20 FN7692.0 August 25, 2010 ISL28233, ISL28433 Package Outline Drawing M8.118A 8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE (MSOP) Rev 0, 9/09 A 3.0±0.1 8 0.25 CAB 3.0±0.1 4.9±0.15 DETAIL "X" 1.10 Max PIN# 1 ID 1 2 0.65 BSC TOP VIEW B SIDE VIEW 2 0.18 ± 0.05 0.95 BSC 0.86±0.09 H C SEATING PLANE 0.33 +0.07/ -0.08 0.08 C A B SIDE VIEW 1 0.10 ± 0.05 0.10 C GAUGE PLANE 0.25 3°±3° 0.55 ± 0.15 DETAIL "X" 5.80 4.40 3.00 NOTES: 1. 2. 3. Dimensions are in millimeters. Dimensioning and tolerancing conform to JEDEC MO-187-AA and AMSE Y14.5m-1994. Plastic or metal protrusions of 0.15mm max per side are not included. Plastic interlead protrusions of 0.25mm max per side are not included. Dimensions “D” and “E1” are measured at Datum Plane “H”. This replaces existing drawing # MDP0043 MSOP 8L. 0.65 0.40 1.40 TYPICAL RECOMMENDED LAND PATTERN 5. 6. 4. 21 FN7692.0 August 25, 2010 ISL28233, ISL28433 Thin Shrink Small Outline Package Family (TSSOP) 0.25 M C A B D N (N/2)+1 A MDP0044 THIN SHRINK SMALL OUTLINE PACKAGE FAMILY MILLIMETERS SYMBOL 14 LD 16 LD 20 LD 24 LD 28 LD TOLERANCE PIN #1 I.D. A A1 A2 1.20 0.10 0.90 0.25 0.15 5.00 6.40 4.40 0.65 0.60 1.00 1.20 0.10 0.90 0.25 0.15 5.00 6.40 4.40 0.65 0.60 1.00 1.20 0.10 0.90 0.25 0.15 6.50 6.40 4.40 0.65 0.60 1.00 1.20 0.10 0.90 0.25 0.15 7.80 6.40 4.40 0.65 0.60 1.00 1.20 0.10 0.90 0.25 0.15 9.70 6.40 4.40 0.65 0.60 1.00 Max ±0.05 ±0.05 +0.05/-0.06 +0.05/-0.06 ±0.10 Basic ±0.10 Basic ±0.15 Reference Rev. F 2/07 E E1 1 B TOP VIEW (N/2) 0.20 C B A 2X N/2 LEAD TIPS b c D E E1 C SEATING PLANE e 0.05 e H L L1 NOTES: b 0.10 C N LEADS SIDE VIEW 0.10 M C A B 1. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall not exceed 0.15mm per side. 2. Dimension “E1” does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm per side. 3. Dimensions “D” and “E1” are measured at dAtum Plane H. 4. Dimensioning and tolerancing per ASME Y14.5M-1994. SEE DETAIL “X” c END VIEW L1 A A2 GAUGE PLANE 0.25 A1 DETAIL X L 0° - 8° 22 FN7692.0 August 25, 2010 ISL28233, ISL28433 Small Outline Package Family (SO) A D N (N/2)+1 h X 45° A E E1 PIN #1 I.D. MARK c SEE DETAIL “X” 1 B (N/2) L1 0.010 M C A B e C H A2 GAUGE PLANE A1 0.004 C 0.010 M C A B b DETAIL X SEATING PLANE L 4° ±4° 0.010 MDP0027 SMALL OUTLINE PACKAGE FAMILY (SO) INCHES SYMBOL A A1 A2 b c D E E1 e L L1 h N NOTES: 1. Plastic or metal protrusions of 0.006” maximum per side are not included. 2. Plastic interlead protrusions of 0.010” maximum per side are not included. 3. Dimensions “D” and “E1” are measured at Datum Plane “H”. 4. Dimensioning and tolerancing per ASME Y14.5M-1994 SO-8 0.068 0.006 0.057 0.017 0.009 0.193 0.236 0.154 0.050 0.025 0.041 0.013 8 SO-14 0.068 0.006 0.057 0.017 0.009 0.341 0.236 0.154 0.050 0.025 0.041 0.013 14 SO16 (0.150”) 0.068 0.006 0.057 0.017 0.009 0.390 0.236 0.154 0.050 0.025 0.041 0.013 16 SO16 (0.300”) (SOL-16) 0.104 0.007 0.092 0.017 0.011 0.406 0.406 0.295 0.050 0.030 0.056 0.020 16 SO20 (SOL-20) 0.104 0.007 0.092 0.017 0.011 0.504 0.406 0.295 0.050 0.030 0.056 0.020 20 SO24 (SOL-24) 0.104 0.007 0.092 0.017 0.011 0.606 0.406 0.295 0.050 0.030 0.056 0.020 24 SO28 (SOL-28) 0.104 0.007 0.092 0.017 0.011 0.704 0.406 0.295 0.050 0.030 0.056 0.020 28 TOLERANCE MAX ±0.003 ±0.002 ±0.003 ±0.001 ±0.004 ±0.008 ±0.004 Basic ±0.009 Basic Reference Reference NOTES 1, 3 2, 3 Rev. M 2/07 23 FN7692.0 August 25, 2010