Ultralow Offset Voltage Dual Op Amp Data Sheet AD708 FEATURES PIN CONFIGURATION Very high dc precision AD708 30 V maximum offset voltage OUTPUT A 1 8 +V S 0.3 V/C maximum offset voltage drift IN A 2 7 OUTPUT B A 0.35 V p-p maximum voltage noise (0.1 Hz to 10 Hz) +IN A 3 + 6 IN B B 5 million V/V minimum open-loop gain V 4 5 +IN B S 130 dB minimum CMRR TOP VIEW 120 dB minimum PSRR (Not to Scale) Matching characteristics Figure 1. PDIP (N) and CERDIP (Q) Packages 30 V maximum offset voltage match 0.3 V/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 55C to +125C 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 1. The combination of outstanding matching and individual dual op amp. In addition, the AD708 provides 5 V/V mini- specifications make the AD708 ideal for constructing high mum open-loop gain and guaranteed maximum input voltage gain, precision instrumentation amplifiers. noise of 350 nV p-p (0.1 Hz to 10 Hz). All dc specifications 2. The low offset voltage drift and low noise of the AD708 show excellent stability over temperature, with offset voltage allow the designer to amplify very small signals without drift typically 0.1 V/C and input bias current drift of sacrificing overall system performance. 25 pA/C maximum. 3. The AD708 10 V/V typical open-loop gain and 140 dB The AD708 is available in four performance grades. The common-mode rejection make it ideal for precision AD708J is rated over the commercial temperature range of applications. 0C to 70C and is available in a narrow body, PDIP. The AD708A and AD708B are rated over the industrial temperature range of 40C to +85C and are available in a CERDIP. Rev. D Document Feedback 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 Tel: 781.329.4700 2018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 05789-001 + AD708 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 10 Pin Configuration ............................................................................. 1 Crosstalk Performance .............................................................. 10 General Description ......................................................................... 1 Operation with a Gain of 100 ................................................. 11 Product Highlights ........................................................................... 1 High Precision Programmable Gain Amplifier ..................... 11 Revision History ............................................................................... 2 Bridge Signal Conditioner......................................................... 12 Specifications ..................................................................................... 3 Precision Absolute Value Circuit ............................................. 12 Absolute Maximum Ratings ............................................................ 5 Selection of Passive Components ............................................. 12 ESD Caution .................................................................................. 5 Outline Dimensions ....................................................................... 13 Typical Performance Characteristics ............................................. 6 Ordering Guide .......................................................................... 13 Matching Characteristics ............................................................. 9 REVISION HISTORY 7/2018Rev. C to Rev. D Deleted LT1002 Reference................................................................ 1 Changes to Figure 28, Figure 29, and High Precision Deleted Figure 1 .................................................................................1 Programmable Gain Amplifier Section ....................................... 11 Deleted Metalization Photograph ................................................... 5 Changes to Ordering Guide .......................................................... 13 Moved Figure 25, Figure 26, and Figure 27 to Theory of Operation section .................................................... 10 1/2006Rev. B to Rev. C Updated Outline Dimensions ....................................................... 13 Updated Format .................................................................. Universal Changes to Ordering Guide .......................................................... 13 Removed TO-99 Package .................................................. Universal Deleted AD707 References ................................................ Universal 2/1991Rev. A to Rev. B Rev. D Page 2 of 16