AD708AH Analog Devices, AD708AH Datasheet

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AD708AH

Manufacturer Part Number
AD708AH
Description
Ultralow Offset Voltage Dual Op Amp
Manufacturer
Analog Devices
Datasheet

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a
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.
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/ V 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 V/ 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.
FEATURES
Very High DC Precision
Matching Characteristics
Single Version: AD707
Available in 8-Pin Plastic Mini-DIP,
30 V max Offset Voltage
0.3 V/ C max Offset Voltage Drift
0.35 V p-p max Voltage Noise (0.1 Hz to 10 Hz)
5 Million V/V min Open Loop Gain
130 dB min CMRR
120 dB min PSRR
30 V max Offset Voltage Match
0.3 V/ C max Offset Voltage Drift Match
130 dB min CMRR Match
Hermetic Cerdip and TO-99 Metal Can
Packages, Chips and /883B Parts Available.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
APPLICATION HIGHLIGHTS
1. The combination of outstanding matching and individual
2. The low offset voltage drift and low noise of the AD708
3. The AD708’s 10 V/ V typical open loop gain and 140 dB
4. Unmounted dice are available for hybrid circuit applications.
5. The AD708 is an improved replacement for the LT1002.
specifications make the AD708 ideal for constructing high
gain, precision instrumentation amplifiers.
allows the designer to amplify very small signals without
sacrificing overall system performance.
common-mode rejection make it ideal for precision
applications.
Plastic (N ), and Cerdip (Q) Packages
CONNECTION DIAGRAMS
Ultralow Offset Voltage
TO-99 (H) Package
Dual Op Amp
AD708
Fax: 617/326-8703

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AD708AH Summary of contents

Page 1

... Military versions are available processed to MIL- STD-883B, Rev. C. 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 ...

Page 2

AD708–SPECIFICATIONS Model Conditions 1 INPUT OFFSET VOLTAGE T MIN Drift Long Term Stability INPUT BIAS CURRENT T MIN Average Drift OFFSET CURRENT MIN Average Drift 2 MATCHING CHARACTERISTICS Offset Voltage T MIN Offset Voltage Drift Input Bias ...

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... C/Watt For supply voltages less than 22 V, the absolute maximum input voltage is equal to the supply voltage. Model AD708JN AD708AQ AD708BQ AD708SQ AD708AH AD708BH AD708SH AD708SH/883B AD708J Grade Chips AD708S Grade Chips *N = Plastic DIP Cerdip Hermetic Metal Can. REV. B AD708J/A Min ...

Page 4

AD708–Typical Characteristics ( and T = +25 C unless otherwise noted –4– REV. B ...

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REV. B –5– AD708 ...

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AD708–Matching Characteristics Figure 18. Typical Distribution of Offset Voltage Match Figure 21. Typical Distribution of Input Offset Current Match Crosstalk from Thermal Effects of Power Dissipation Figure 24. Crosstalk with No Load Figure 19. Typical Distribution of Offset Voltage Drift ...

Page 7

CROSSTALK PERFORMANCE OF THE AD708 The AD708 exhibits very low crosstalk as shown in Figures 24, 25 and 26. Figure 24 shows the offset voltage induced in side B of the AD708 when side A’s output is moving slowly (0.2 ...

Page 8

AD708 As configured, the circuit only requires a gain resistor, R suitable accuracy and a stable, accurate voltage reference. The transfer function is R/(R+ R)][R /R] O REF G and the only significant errors due to ...

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