Datasheet AD708 (Analog Devices)

Ultralow Offset Voltage Dual Op Amp AD708 FEATURES PIN CONFIGURATION Very high dc precision 30 μV maximum offset voltage AD708 OUTPUT A 1 8 +VS 0.3 μV/°C maximum offset voltage drift –IN A 2 7 OUTPUT B – 0.35 μV p-p maximum voltage noise (0.1 Hz to 10 Hz) A +IN A 3 + 6 –IN B – 5 million V/V minimum open-loop gain B –V 4 S + 5 +IN B 130 dB minimum CMRR
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120 dB minimum PSRR TOP VIEW (Not to Scale)
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Matching characteristics
Figure 1. PDIP (N) and CERDIP (Q) Packages
30 μV maximum offset voltage match 0.3 μV/°C maximum offset voltage drift match 130 dB minimum CMRR match Available in 8-lead narrow body, PDIP, and hermetic CERDIP and CERDIP/883B packages GENERAL DESCRIPTION
The AD708 is a high precision, dual monolithic operational The AD708S is rated over the military temperature range of amplifier. Each amplifier individually offers excellent dc −55°C to +125°C and is available in a CERDIP military version precision with maximum offset voltage and offset voltage drift processed to MIL-STD-883B. of any dual bipolar op amp.
PRODUCT HIGHLIGHTS
The matching specifications are among the best available in any dual op amp. In addition, the AD708 provides 5 V/μV mini- 1. The combination of outstanding matching and individual mum open-loop gain and guaranteed maximum input voltage specifications make the AD708 ideal for constructing high noise of 350 nV p-p (0.1 Hz to 10 Hz). All dc specifications gain, precision instrumentation amplifiers. show excellent stability over temperature, with offset voltage 2. The low offset voltage drift and low noise of the AD708 drift typically 0.1 μV/°C and input bias current drift of allow the designer to amplify very small signals without 25 pA/°C maximum. sacrificing overall system performance. The AD708 is available in four performance grades. The 3. The AD708 10 V/μV typical open-loop gain and 140 dB AD708J is rated over the commercial temperature range of common-mode rejection make it ideal for precision 0°C to 70°C and is available in a narrow body, PDIP. The applications. AD708A and AD708B are rated over the industrial temperature range of −40°C to +85°C and are available in a CERDIP.
Rev. C 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2006 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES PIN CONFIGURATION GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CROSSTALK PERFORMANCE OPERATION WITH A GAIN OF −100 HIGH PRECISION PROGRAMMABLE GAIN AMPLIFIER BRIDGE SIGNAL CONDITIONER PRECISION ABSOLUTE VALUE CIRCUIT SELECTION OF PASSIVE COMPONENTS OUTLINE DIMENSIONS ORDERING GUIDE