AMPAD708 AD | Alldatasheet

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TO-99 (H) Package Plastic (N ), and Cerdip (Q) Packages REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices 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 Analog Devices. a Ultralow Offset Voltage Dual Op Amp AD708 Tel: 617/329-4700 Fax: 617/326-8703

FEATURES

0.3 mV/8C max Offset Voltage Drift 0.35 mV p-p max Voltage Noise (0.1 Hz to 10 Hz)

5 Million V/V min Open Loop Gain

30 mV max Offset Voltage Match 0.3 mV/8C max Offset Voltage Drift Match 130 dB min CMRR Match Single Version: AD707 Available in 8-Pin Plastic Mini-DIP, Hermetic Cerdip and TO-99 Metal Can Packages, Chips and /883B Parts Available. PRODUCT DESCRIPTION The AD708 is a very high precision, dual monolithic operational amplifier. Each amplifier individually offers excellent dc precision with the best available max offset voltage and offset voltage drift of any dual bipolar op amp. In addition, the matching specifica- tions are the best available in any dual op amp. The AD708 sets a new standards for dual precision op amps by providing 5 V/µV min open loop gain and guaranteed max input voltage noise of 350 nV p-p (0.1 Hz to 10 Hz). All dc specifica- tions show excellent stability over temperature, with offset voltage drift typically 0.1 µV/°C and input bias current drift of 25 pA/°C max. Both CMRR (130 dB min) and PSRR (120 dB min) are an order of magnitude improved over any available single monolithic op amp except the AD707. The AD708 is available in four performance grades. The AD708J is rated over the commercial temperature range of 0 °C to +70°C and jis available in a plastic mini-DIP package. The AD708A and AD708B are rated over the industrial temperature range of –40°C to +85°C and are available in a cerdip and TO- 99 package. The AD708S is rated over the military temperature range of –55°C to +125°C and is available in cerdip and TO-99 packages. Military versions are available processed to MIL- STD-883B, Rev. C. APPLICATION HIGHLIGHTS 1. The combination of outstanding matching and individual specifications make the AD708 ideal for constructing high gain, precision instrumentation amplifiers. 2. The low offset voltage drift and low noise of the AD708 allows the designer to amplify very small signals without sacrificing overall system performance. 3. The AD708’s 10 V/µV typical open loop gain and 140 dB common-mode rejection make it ideal for precision applications. 4. Unmounted dice are available for hybrid circuit applications. 5. The AD708 is an improved replacement for the LT1002.

AD708–SPECIFICATIONS(@ +258C and 615 V dc, unless otherwise noted) –2– REV. B AD708J/A AD708B AD708S Model Conditions Min Typ Max Min Typ Max Min Typ Max Units INPUT OFFSET VOLTAGE 1 30 100 5 50 5 30 µV TMIN to TMAX 50 150 15 65 15 50 µV Long Term Stability 0.3 0.3 0.3 µV/Month Average Drift 15 40 10 25 10 30 pA/ °C Average Drift 2 60 1 25 1 25 pA/ °C MATCHING CHARACTERISTICS2 Offset Voltage 80 50 30 µV TMIN to TMAX 150 75 50 µV Offset Voltage Drift 1.0 0.4 0.3 µV/°C Input Bias Current 4.0 1.0 1.0 nA TMIN to TMAX 5.0 2.0 2.0 nA Common-Mode Rejection 120 140 130 140 130 140 dB TMIN to TMAX 110 130 130 dB Power Supply Rejection 110 120 120 dB TMIN to TMAX 110 120 120 dB Channel Separation 135 140 140 dB f = 10 Hz 10.3 18 10.3 12 10.3 12 nV/ √Hz INPUT CURRENT NOISE 0.1 Hz to 10 Hz 14 35 14 35 14 35 pA p-p COMMON-MODE REJECTION RATIO V CM = ± 13 V 120 140 130 140 130 140 dB TMIN to TMAX 120 140 130 140 130 140 dB OPEN-LOOP GAIN V O = ± 10 V RLOAD ≥ 2 kΩ 3 10 5 10 4 10 V/ µV TMIN to TMAX 31 0 51 0 4 7V / µV POWER SUPPLY REJECTION RATIO V S = ± 3 V to ± 18 V 110 130 120 130 120 130 dB TMIN to TMAX 110 130 120 130 120 130 dB FREQUENCY RESPONSE INPUT RESISTANCE Differential 60 200 200 M Ω Common Mode 200 400 400 G Ω OUTPUT VOLTAGE R LOAD ≥ 10 kΩ 13.5 14 13.5 14.0 13.5 14 ± V RLOAD ≥ 2 kΩ OPEN-LOOP OUTPUT RESISTANCE 60 60 60 Ω

Model Conditions Min Typ Max Min Typ Max Min Typ Max Units POWER SUPPLY Power Consumption V S = ± 15 V No Load 135 165 135 165 135 165 mW VS = ± 3 V 12 18 12 18 12 18 mW Operating Range ± 3 ± 18 ± 3 ± 18 ± 3 ± 18 V NOTES 1Input offset voltage specifications are guaranteed after 5 minutes of operation at T A = +25°C. 2Matching is defined as the difference between parameters of the two amplifiers. All min and max specifications are guaranteed. Specifications in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. Specifications subject to change without notice. ABSOLUTE MAXIMUM RATINGS 1 Internal Power Dissipation 2 NOTES 1Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2Thermal Characteristics 8-Pin Plastic Package: θJC = 33°C/Watt, θJA = 100°C/Watt 8-Pin Cerdip package: θJC = 30°C/Watt, θJA = 110°C/Watt 8-Pin Metal Can Package: θJC = 65°C/Watt, θJA = 150°C/Watt. 3For supply voltages less than ± 22 V, the absolute maximum input voltage is equal to the supply voltage. METALIZATION PHOTOGRAPH Dimensions shown in inches and (mm). Contact factory for latest dimensions. REV. B –3– AD708 ORDERING GUIDE Temperature Package Package Model Range Description Option* AD708JN 0 °C to +70°C 8-Pin Plastic DIP N-8 AD708AQ –40 °C to +85°C 8-Pin Cerdip Q-8 AD708BQ –40 °C to +85°C 8-Pin Cerdip Q-8 AD708SQ –55 °C to +125°C 8-Pin Cerdip Q-8 AD708AH –40 °C to +85°C 8-Pin Header H-08A AD708BH –40 °C to +85°C 8-Pin Header H-08A AD708SH –55 °C to +125°C 8-Pin Header H-08A AD708SH/883B –55 °C to +125°C 8-Pin Header H-08A AD708J Grade Chips 0 °C to +70°C Die AD708S Grade Chips –55 °C to +125°C Die *N = Plastic DIP; Q = Cerdip; H = Hermetic Metal Can.

REV. B–4– (VS = 615 V and TA = +258C unless otherwise noted)AD708–Typical Characteristics

REV. B –5– π