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U U LTC2051/LTC2052 Dual/Quad Zero-Drift Operational Amplifiers FEATURES s Maximum Offset Voltage of 3µV s Maximum Offset Voltage Drift of 30nV/°C s Small Footprint, Low Profile MS8/GN16 Packages s Single Supply Operation: 2.7V to ±5.5V s Noise: 1.5µVP-P (0.01Hz to 10Hz Typ) s Voltage Gain: 140dB (Typ) s PSRR: 130dB (Typ) s CMRR: 130dB (Typ) s Supply Current: 0.75mA (Typ) per Amplifier s Extended Common Mode Input Range s Output Swings Rail-to-Rail s Operating Temperature Range – 40°C to 85°C U APPLICATIO S s Thermocouple Amplifiers s Electronic Scales s Medical Instrumentation s Strain Gauge Amplifiers s High Resolution Data Acquisition s DC Accurate RC Active Filters s Low Side Current Sense DESCRIPTIO The LTC®2051/LTC2052 are dual/quad zero-drift operational amplifiers available in the MS8 and SO-8/GN16 and S14 packages. They operate from a single 2.7V supply and support ±5V applications. The current consumption is 750µA per op amp. The LTC2051/LTC2052, despite their miniature size, feature uncompromising DC performance. The typical input offset voltage and offset drift are 0.5µV and 10nV/°C. The almost zero DC offset and drift are supported with a power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) of more than 130dB. The input common mode voltage ranges from the negative supply up to typically 1V from the positive supply. The LTC2051/LTC2052 also have an enhanced output stage capable of driving loads as low as 2kΩ to both supply rails. The open-loop gain is typically 140dB. The LTC2051/ LTC2052 also feature a 1.5µVP-P DC to 10Hz noise and a 3MHz gain-bandwidth product. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIO High Performance Low Cost Instrumentation Amplifier R1 100Ω 0.1% R2 10k 5V 0.1% 2– 8 1/2 1 LTC2051HV –VIN 3 + R2 10k 0.1% R1 100Ω 0.1% 6– 1/2 7 LTC2051HV VIN 5 + 4 AV = 101 –5V 20512 TA01 µV Input Referred Noise 0.1Hz to 10Hz 2 1 0 –1 –2 0 2 4 6 8 10 TIME (SEC) 2052 TA02 1 LTC2051/LTC2052 U WW W ABSOLUTE AXI U RATI GS (Note 1) Total Supply Voltage (V+ to V –) LTC2051/LTC2052 .................................................. 7V LTC2051HV/LTC2052HV ....................................... 12V Input Voltage (Note 5) .......... (V + + 0.3V) to (V – – 0.3V) Output Short-Circuit Duration ......................... Indefinite Operating Temperature Range ............... – 40°C to 85°C Specified Temperature Range (Note 3) .. – 40°C to 85°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C UW U PACKAGE/ORDER I FOR ATIO OUT A 1 –IN A 2 +IN A 3 V– 4 TOP VIEW 8 V+ 7 OUT B 6 –IN B 5 +IN B MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 125°C, θJA = 250°C/W ORDER PART NUMBER LTC2051CMS8 LTC2051IMS8 LTC2051HVCMS8 LTC2051HVIMS8 MS8 PART MARKING LTMN LTMP LTPJ LTPK TOP VIEW OUT A 1 –IN A 2 +IN A 3 V+ 4 +IN B 5 –IN B 6 OUT B 7 NC 8 16 OUT D 15 –IN D 14 +IN D 13 V– 12 +IN C 11 –IN C 10 OUT C 9 NC GN PACKAGE 16-LEAD PLASTIC SSOP TJMAX = 125°C, θJA = 110°C/W Consult factory for Military grade parts. OUT A 1 –IN A 2 +IN A 3 V– 4 SHDN A 5 TOP VIEW 10 V+ 9 OUT B 8 –IN B 7 +IN B 6 SHDN B MS10 PACKAGE 10-LEAD PLASTIC MSOP TJMAX = 125°C, θJA = 250°C/W OUT A 1 –IN A 2 +IN A 3 V– 4 TOP VIEW 8 V+ 7 OUT B 6 –IN B 5 +IN B S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 125°C, θJA = 190°C/W ORDER PART NUMBER MS10 PART MARKING ORDER PART NUMBER S8 PART MARKING LTC2051CMS10 LTC2051IMS10 LTC2051HVCMS10 LTC2051HVIMS10 LTMQ LTMR LTRB LTRC LTC2051CS8 LTC2051IS8 LTC2051HVCS8 LTC2051HVIS8 2051 2051I 2051HV 051HVI ORDER PART NUMBER LTC2052CGN LTC2052IGN LTC2052HVCGN LTC2052HVIGN GN PART MARKING 2052 2052I 2052HV 052HVI 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 V– 10 +IN C 9 –IN C 8 OUT C S PACKAGE 14-LEAD PLASTIC SO TJMAX = 125°C, θJA = 110°C/W ORDER PART NUMBER LTC2052CS LTC2052IS LTC2052HVCS LTC2052HVIS 2 LTC2051/LTC2052 ELECTRICAL CHARACTERISTICS (LTC2051/LTC2052, LTC2051HV/LTC2052HV) The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V, 5V unless otherwise noted. (Note 3) PARAMETER Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current (Note 4) Input Offset Current (Note 4) Input Noise Voltage Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing High Output Voltage Swing Low Slew Rate Gain Bandwidth Product Supply Current (Per Amplifier) Supply Current, Shutdown Shutdown Pin Input Low Voltage (VIL) Shutdown Pin Input High Voltage (VIH) Shutdown Pin Input Current Internal Sampling Frequency CONDITIONS (Note 2) (Note 2) VS = 3V VS = 3V VS = 5V VS = 5V VS = 3V VS = 3V VS = 5V VS = 5V RS = 100Ω, DC to 10Hz VCM = GND to V+ – 1.3, VS = 3V VCM = GND to V+ – 1.3, VS = 5V RL = 10k, VS = 3V RL = 10k, VS = 5V RL = 2k to GND RL = 10k to GND RL = 2k to GND RL = 10k to GND No Load, VS = 3V, VSHDN = VIH No Load, VS = 5V, VSHDN = VIH VSHDN = VIL, VS = 3V VSHDN = VIL, VS = 5V VSHDN = VIL, VS = 3V VSHDN = VIL, VS = 5V MIN TYP MAX ±0.5 ±3 q 0.01 ±0.03 50 ±8 ±50 q ±100 ±25 ±75 q ±150 ±100 q ±150 ±150 q ±200 1.5 115 130 q 110 130 120 130 q 115 130 120 130 q 115 130 120 140 q 115 140 125 140 q 120 140 q V+ – 0.15 V+ – 0.06 q V+ – 0.05 V+ – 0.02 q 2 15 q 2 15 2 3 q 0.75 1.0 q 0.85 1.2 q 2 5 q 4 10 q q V + – 0.5 V – + 0.5 q –1 –3 q –2 –5 7.5 UNITS µV µV/°C nV/√mo pA pA pA pA pA pA pA pA µVP-P dB dB dB dB dB dB dB dB dB dB V V mV mV V/µs MHz mA mA µA µA V V µA µA kHz 3 LTC2051/LTC2052 ELECTRICAL CHARACTERISTICS (LTC2051HV/LTC2052HV) The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current (Note 4) Input Offset Current (Note 4) Input Noise Voltage Common Mode Rejection Ratio (Note 2) (Note 2) RS = 100Ω, DC to 10Hz VCM = V– to V+ – 1.3 q q q 125 q 120 ±1 ±3 µV 0.01 ±0.03 µV/°C 50 nV/√mo ±90 ±150 pA ±300 pA ±300 pA ±500 pA 1.5 µVP-P 130 dB 130 dB Power Supply Rejection Ratio 120 130 dB q 115 130 dB Large-Signal Voltage Gain RL = 10k 125 140 dB q 120 140 dB Maximum Output Voltage Swing RL = 2k to GND q ±4.75 ±4.92 V RL = 10k to GND q ±4.90 ±4.98 V Slew Rate 2 V/µs Gain Bandwidth Product 3 MHz Supply Current (Per Amplifier) Supply Current, Shutdown Shutdown Pin Input Low Voltage (VIL) Shutdown Pin Input High Voltage (VIH) Shutdown Pin Input Current Internal Sampling Frequency No Load, VSHDN = VIH VSHDN = VIL VSHDN = VIL q 1 1.5 mA q 15 30 µA q q V + – 0.5 V – + 0.5 V V q –7 –15 µA 7.5 kHz Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: These parameters are guaranteed by design. Thermocouple effects preclude measurements of these voltage levels during automated testing. Note 3: The LTC2051C/LTC2052C, LTC2051HVC/LTC2052HVC are guaranteed to meet specified performance from 0°C to 70°C and are designed, characterized and expected to meet these extended temperature limits, but are not tested at – 40°C and 85°C. The LTC2051I/LTC2052I, LTC2051HVI/LTC2052HVI are guaranteed to meet the extended temperature limits. Note 4: The bias current measurement accuracy depends on the proximity of the negative supply bypass capacitors to the device under test. Because of this, only the bias current of channel B (LTC2051) and channels A and B (LTC2052) are 100% tested to the data sheet specifications. The bias currents of the remaining channels are 100% tested to relaxed limits, however, their values are guaranteed by design to meet the data sheet limits. Note 5: This parameter is guaranteed to meet specified performance through design and characterization. It has not been tested. 4 UW TYPICAL PERFOR A CE CHARACTERISTICS LTC2051/LTC2052 CMRR (dB) OUTPUT SWING (V) Common Mode Rejection Ratio vs Frequency 140 VS = 3V OR ±5V 120 VCM = 0.5VP-P 100 80 60 40 20 0 1 10 100 1k 10k 100k FREQUENCY (Hz) 20512 G01 Output Voltage Swing vs Load Resistance 6 RL TO GND 5 VS = 5V CMRR (dB) DC CMRR vs Common Mode Input Range 140 120 100 VS = 3V 80 VS = 10V VS = 5V 60 40 20 0 0 2 4 6 8 10 VCM (V) 20512 G02 Output Swing vs Output Current 6 VS = 5V 5 OUTPUT VOLTAGE (V) 4 3 VS = 3V 4 VS = 3V 3 2 2 1 1 0 0 2 4 6 8 10 LOAD RESISTANCE (kΩ) 20512 G04 Output Swing vs Output Current, ±5V Supply 5 4 RL TO GND 3 2 1 0 –1 –2 –3 –4 –5 0.01 0.1 1 10 OUTPUT CURRENT (mA) 20512 G07 GAIN (dB) 0 0.01 0.1 1 OUTPUT CURRENT (mA) 10 20512 G05 Gain/Phase vs Frequency 100 80 PHASE 80 100 60 GAIN 40 20 0 –20 VS = 3V OR ±5V CL = 50pF RL = 100k –40 100 1k 10k 100k FREQUENCY (Hz) 120 140 160 180 200 1M 10M 20512 G08 PHASE (DEG) BIAS CURRENT (pA) OUTPUT VOLTAGE (V) PSRR (dB) PSRR vs Frequency 120 100 –PSRR 80 60 +PSRR 40 20 0 10 100 1k 10k 100k 1M FREQUENCY (Hz) 20512 G03 Output Swing vs Load Resistance ±5V 5 4 RL TO GND 3 2 1 0 –1 –2 –3 –4 –5 0 2 4 6 8 10 LOAD RESISTANCE (kΩ) 20512 G06 Bias Current vs Temperature 10k 1k 100 VS = ±5V VS = 5V 10 VS = 3V 1 –50 0 50 TEMPERATURE (°C) 100 125 20512 G09 OUTPUT SWING (V) 5 LTC2051/LTC2052 TYPICAL PERFOR A CE CHARACTERISTICS UW INPUT BIAS CURRENT (pA) SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) SAMPLING FREQUENCY (kHz) SAMPLING FREQUENCY (kHz) Input Bias Current vs Input Common Mode Voltage 250 Transient Response 200 2V/DIV 150 100 VS = ±5V 50 0 –5 VS = 5V VS = 3V –3 –1 0 1 3 5 INPUT COMMON MODE VOLTAGE (V) 20512 G10 Sampling Frequency vs Supply Voltage 10 AV = 1 RL = 10k CL = 100pF VS = ±5V 1µs/DIV 9 8 7 6 5 3 5 7 9 11 SUPPLY VOLTAGE (V) 20512 G13 Supply Current (Per Amplifier) vs Supply Voltage 1.2 1.0 0.8 0.6 0.4 0.2 0 2.5 4.5 6.5 8.5 SUPPLY VOLTAGE (V) 10.5 20512 G15 20512 G11 OUTPUT (V) INPUT (V) Input Overload Recovery 0 – 0.1 1.5 0 AV = – 100 RL = 100k CL = 10pF VS = 3V 500µs/DIV 2050 G12 Sampling Frequency vs Temperature 10 9 8 VS = ±5V VS = 3V 7 6 5 –50 0 50 TEMPERATURE (°C) 100 125 20512 G14 Supply Current (Per Amplifier) vs Temperature 1.2 VS = ±5V 1.0 VS = 5V 0.8 0.6 VS = 3V 0.4 0.2 0 –50 0 50 TEMPERATURE (°C) 100 125 20512 G16 6 LTC2051/LTC2052 U W UU APPLICATIO S I FOR ATIO Shutdown The LTC2051 includes a shutdown pin in the 10-lead MSOP. When this active low pin is high or allowed to float, the device operates normally. When the shutdown pin is pulled low, the device enters shutdown mode; supply current drops to 3µA, all clocking stops and the output assumes a high impedance state. Clock Feedthrough, Input Bias Current The LTC2051/LTC2052 use autozeroing circuitry to achieve an almost zero DC offset over temperature, common mode voltage and power supply voltage. The frequency of the clock used for autozeroing is typically 7.5kHz. The term clock feedthrough is broadly used to indicate visibility of this clock frequency in the op amp output spectrum. There are typically two types of clock feedthrough in autozeroed op amps like the LTC2051/LTC2052. The first form of clock feedthough is caused by the settling of the internal sampling capacitor and is input referred; that is, it is multiplied by the closed-loop gain of the op amp. This form of clock feedthrough is independent of the magnitude of the input source resistance or the magnitude of the gain setting resistors. The LTC2051/LTC2052 have a residue clock feedthrough of less than 1µVRMS input referred at 7.5kHz. The second form of clock feedthrough is caused by the small amount of charge injection occurring during the sampling and holding of the op amps input offset voltage. The current spikes are multiplied by the impedance seen at the input terminals of the op amp, appearing at the output multiplied by the closed-loop gain of the op amp. To reduce this form of clock feedthrough, use smaller valued gain setting resistors and minimize the source resistance at the input. If the resistance seen at the inputs is less than 10k, this form of clock feedthrough is less than 1µVRMS input referred at 7.5kHz, or less than the amount of residue clock feedthrough from the first form previously described. Placing a capacitor across the feedback resistor reduces either form of clock feedthrough by limiting the bandwidth of the closed-loop gain. Input bias current is defined as the DC current into the input pins of the op amp. The same current spikes that cause the second form of clock feedthrough previously described, when averaged, dominate the DC input bias current of the op amp below 70°C. At temperatures above 70°C, the leakage of the ESD protection diodes on the inputs increase the input bias currents of both inputs in the positive direction, while the current caused by the charge injection stays relatively constant. At elevated temperatures (above 85°C) the leakage current begins to dominate and both the negative and positive pin’s input bias currents are in the positive direction (into the pins). Input Pins, ESD Sensitivity ESD voltages above 700V on the input pins of the op amp will cause the input bias currents to increase (more DC current into the pins). At these voltages, it is possible to damage the device to a point where the input bias current exceeds the maximums specified in this data sheet. 7 LTC2051/LTC2052 U TYPICAL APPLICATIO The dual chopper op amp buffers the inputs of A1 and corrects its offset voltage and offset voltage drift. With the RC values shown, the power-up warm-up time is typically 20 seconds. The step response of the composite amplifier does not present settling tails. The LT®1677 should be used when extremely low noise, VOS and VOS drift are needed and the input source resistance is low. (For in- stance a 350Ω strain gauge bridge.) The LT1012 or equivalent should be used when low bias current (100pA) is also required in conjunction with DC to 10Hz low noise, low VOS and VOS drift. The measured typical input offset voltages are less than 1µV. Obtaining Ultralow VOS Drift and Low Noise + 5+ 2– 7 1/2 LTC2051 1 1/2 LTC2051 R4 6– 3+ 5V C1 R5 R1 R2 C2 R3 3+ 1 8 6 A1 OUT – 2– OUT 20512 F01 A1 R1 R2 R3 LT1677 2.49k 3.01k 340k LT1012 750Ω 57Ω 250k R4 R5 C1 C2 eIN (DC – 1Hz) eIN (DC – 10Hz) 10k 100k 0.01µF 0.001µF 0.15µVP-P 0.2µVP-P 10k 100k 0.01µF 0.001µF 0.3µVP-P 0.4µVP-P 8 LTC2051/LTC2052 U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. MS8 Package 8-Lead Plastic MSOP (LTC DWG # 05-08-1660) 0.118 ± 0.004* (3.00 ± 0.102) 8 76 5 0.193 ± 0.006 (4.90 ± 0.15) 0.118 ± 0.004** (3.00 ± 0.102) 1 234 0.007 (0.18) 0° – 6° TYP 0.021 ± 0.006 (0.53 ± 0.015) 0.040 ± 0.006 (1.02 ± 0.15) SEATING PLANE 0.012 (0.30) REF 0.0256 (0.65) BSC 0.034 ± 0.004 (0.86 ± 0.102) 0.006 ± 0.004 (0.15 ± 0.102) MSOP (MS8) 1098 * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE MS10 Package 10-Lead Plastic MSOP (LTC DWG # 05-08-1661) 0.118 ± 0.004* (3.00 ± 0.102) 10 9 8 7 6 0.193 ± 0.006 (4.90 ± 0.15) 0.118 ± 0.004** (3.00 ± 0.102) 12345 0.007 (0.18) 0° – 6° TYP 0.021 ± 0.006 (0.53 ± 0.015) 0.040 ± 0.006 (1.02 ± 0.15) SEATING PLANE 0.009 (0.228) REF 0.0197 (0.50) BSC 0.034 ± 0.004 (0.86 ± 0.102) 0.006 ± 0.004 (0.15 ± 0.102) MSOP (MS10) 1098 * DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE 9 LTC2051/LTC2052 U PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.189 – 0.197* (4.801 – 5.004) 8 7 6 5 0.228 – 0.244 (5.791 – 6.197) 0.150 – 0.157** (3.810 – 3.988) 1 2 0.010 (0.254 – – 0.020 0.508) × 45° 0.008 – 0.010 (0.203 – 0.254) 0.053 – 0.069 (1.346 – 1.752) 0°– 8° TYP 0.016 – 0.050 (0.406 – 1.270) 0.014 – 0.019 (0.355 – 0.483) TYP *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 34 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSC SO8 1298 10 GN Package 16-Lead Plastic SSOP (Narrow 0.150) (LTC DWG # 05-08-1641) 0.189 – 0.196* (4.801 – 4.978) 16 15 14 13 12 11 10 9 0.009 (0.229) REF 0.229 – 0.244 (5.817 – 6.198) 0.150 – 0.157** (3.810 – 3.988) 1 234 5678 0.007 – 0.0098 (0.178 – 0.249) 0.015 (0.38 ± ± 0.004 0.10) × 45° 0° – 8° TYP 0.053 – 0.068 (1.351 – 1.727) 0.016 – 0.050 (0.406 – 1.270) 0.008 – 0.012 (0.203 – 0.305) * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 0.004 – 0.0098 (0.102 – 0.249) 0.0250 (0.635) BSC GN16 (SSOP) 1098 U LTC2051/LTC2052 PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. S Package 14-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.337 – 0.344* (8.560 – 8.738) 14 13 12 11 10 9 8 0.228 – 0.244 (5.791 – 6.197) 0.150 – 0.157** (3.810 – 3.988) 0.010 (0.254 – – 0.020 0.508) × 45° 0.008 – 0.010 (0.203 – 0.254) 1 2 3 4 5 6 7 0.053 – 0.069 (1.346 – 1.752) 0° – 8° TYP 0.004 – 0.010 (0.101 – 0.254) 0.016 – 0.050 (0.406 – 1.270) 0.014 – 0.019 (0.355 – 0.483) TYP *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 0.050 (1.270) BSC S14 1298 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 LTC2051/LTC2052 TYPICAL APPLICATIO U Paralleling Amplifiers to Improve Noise R2 R1 2 – 1 R 1/4 LTC2052 3+ R R2 5V VIN R1 6 – 7 R 1/4 LTC2052 13 – 4 0.1µF 5+ 14 1/4 LTC2052 12 + 11 VOUT R2 0.1µF R1 9 – –5V 8 R 1/4 LTC2052 10 + VOUT VIN = 3 R2 R1 ; INPUT DC – 10Hz NOISE ≅ 0.8µVP-P = NOISE OF EACH PARALLEL OP AMP √3 20512 F02 RELATED PARTS PART NUMBER DESCRIPTION LTC1051/LTC1053 Precision Zero-Drift Op Amp LTC1151 ±15V Zero-Drift Op Amp LTC1152 Rail-to-Rail Input and Output Zero-Drift Op Amp LTC2050 Zero-Drift Op Amp in SOT-23 COMMENTS Dual/Quad Dual High Voltage Operation ±18V Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown Single Supply Operation 2.7V to ±5V, Shutdown 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com 20512f LT/TP 1100 4K • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2000

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