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
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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