ANALOG DEVICES OP97 Service Manual

Low Power, High Precision

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FEATURES

Low supply current: 600 μA maximum
OP07 type performance

Offset voltage: 20 μV maximum
Offset voltage drift: 0.6 μV/°C maximum

Very low bias current

25°C: 100 pA maximum

−55°C to +125°C: 250 pA maximum
High common-mode rejection: 114 dB minimum
Extended industrial temperature range: −40°C to +85°C

GENERAL DESCRIPTION

The OP97 is a low power alternative to the industry-standard
OP07 precision amplifier. The OP97 maintains the standards of
performance set by the OP07 while utilizing only 600 μA supply
current, less than 1/6 that of an OP07. Offset voltage is an ultralow
25 μV, and drift over temperature is below 0.6 μV/°C. External
offset trimming is not required in the majority of circuits.

Improvements have been made over OP07 specifications in
several areas. Notable is bias current, which remains below
250 pA over the full military temperature range. The OP97 is
ideal for use in precision long-term integrators or sample-and­hold circuits that must operate at elevated temperatures.

Operational Amplifier

OP97

PIN CONNECTIONS

1

NULL

2

–IN

3

+IN

4

V–

Figure 1. 8-Lead PDIP (P Suffix)

8-Lead SOIC (S Suffix)

Common-mode rejection and power supply rejection are also
improved with the OP97, at 114 dB minimum over wider
ranges of common-mode or supply voltage. Outstanding PSR, a
supply range specified from ±2.25 V to ±20 V, and the minimal
power requirements of the OP97 combine to make the OP97 a
preferred device for portable and battery-powered instruments.

The OP97 conforms to the OP07 pinout, with the null potenti­ometer connected between Pin 1 and Pin 8 with the wiper to
V+. The OP97 upgrades circuit designs using AD725, OP05,
OP07, OP12, and PM1012 type amplifiers. It may replace 741­type amplifiers in circuits without nulling or where the nulling
circuitry has been removed.

OP97

8

7

6

5

NULL

V+

OUT

OVER
COMP

00299-001

Rev. F

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 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.
Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©1997–2007 Analog Devices, Inc. All rights reserved.

OP97

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TABLE OF CONTENTS

Features .............................................................................................. 1

Pin Connections ............................................................................... 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications ..................................................................................... 3

Electrical Characteristics ............................................................. 3

Absolute Maximum Ratings ............................................................ 5

Thermal Resistance ...................................................................... 5

REVISION HISTORY

11/07—Rev. E to Rev. F

Updated Format .................................................................. Universal

Changes to Ordering Guide .......................................................... 16

07/03—Rev. D to Rev. E

Deleted H-08A .................................................................... Universal

Deleted Q-8 ......................................................................... Universal

Deleted E-20A ..................................................................... Universal

Deleted Die Characteristics ............................................................. 4

Deleted Wafer Test Limits ............................................................... 4

Updated TPC 14 ............................................................................... 5

Updated Outline Dimensions ....................................................... 10

ESD Caution...................................................................................5

Typical Performance Characteristics ..............................................6

Application Information ................................................................ 11

AC Performance ............................................................................. 12

Guarding and Shielding ................................................................. 13

Outline Dimensions ....................................................................... 15

Ordering Guide .......................................................................... 16

01/02—Rev. C to Rev. D

Edits to Absolute Maximum Ratings .............................................. 3

Edits to Ordering Guide ................................................................... 3

Deleted DICE Characteristics .......................................................... 3

Deleted Wafer Test Limits ................................................................ 3

Edits to Applications Information ................................................... 7

Rev. F | Page 2 of 16

OP97

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SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

VS = ±15 V, VCM = 0 V, TA = 25°C, unless otherwise noted.

Table 1.

OP97E OP97F

Parameter Symbol Conditions Min Typ Max Min Typ Max Unit

INPUT CHARACTERISTICS

Input Offset Voltage VOS 10 25 30 75 μV
Long-Term Offset

Voltage Stability ΔVOS/Time 0.3 0.3 μV/month
Input Offset Current IOS 30 100 30 150 pA
Input Bias Current IB ±30 ±100 ±30 ±150 pA
Input Noise Voltage en p-p 0.1 Hz to 10 Hz 0.5 0.5 μV p-p
Input Noise Voltage Density en fO = 10 Hz1 17 30 17 30 nV/√Hz
f
Input Noise Current Density in fO = 10 Hz 20 20 fA/√Hz
Large Signal Voltage Gain AVO VO = ±10 V; RL = 2 kΩ 300 2000 200 2000 V/mV
Common-Mode Rejection CMR VCM = ±13.5 V 114 132 110 132 dB
Input Voltage Range3 IVR ±13.5 ±14.0 ±13.5 ±14.0 V

OUTPUT CHARACTERISTICS

Output Voltage Swing VO RL = 10 kΩ ±13 ±14 ±13 ±14 V
Differential Input Resistance

4

R

30 30 MΩ

IN

POWER SUPPLY

Power Supply Rejection PSR VS = ±2 V to ±20 V 114 132 110 132 dB
Supply Current ISY 380 600 380 600 μA
Supply Voltage VS Operating range ±2 ±15 ±20 ±2 ±15 ±20 V

DYNAMIC PERFORMANCE

Slew Rate SR 0.1 0.2 0.1 0.2 V/μs
Closed-Loop Bandwidth BW A

1

10 Hz noise voltage density is sample tested. Devices 100% tested for noise are available on request.

2

Sample tested.

3

Guaranteed by CMR test.

4

Guaranteed by design.

= 1000 Hz2 14 22 14 22 nV/√Hz

O

= 1 0.4 0.9 0.4 0.9 MHz

VCL

Rev. F | Page 3 of 16

OP97

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VS = ±15 V, VCM = 0 V, −40°C ≤ TA ≤ +85°C for the OP97E/OP97F, unless otherwise noted.

Table 2.

OP97E OP97F
Parameter Symbol Conditions Min Typ Max Min Typ Max Unit

Input Offset Voltage VOS 25 60 60 200 μV
Average Temperature TCVOS S suffix 0.2 0.6 0.3 2.0 μV/°C
Coefficient of VOS 0.3
Input Offset Current IOS 60 250 80 750 pA
Average Temperature TCIOS 0.4 2.5 0.6 7.5 pA/°C
Coefficient of I
Input Bias Current IB ±60 ±250 ±80 ±750 pA
Average Temperature
Coefficient of IB TCIB 0.4 2.5 0.6 7.5 pA/°C
Large Signal Voltage Gain AVO VO = 10 V; RL = 2 kΩ 200 1000 150 1000 V/mV
Common-Mode Rejection CMR VCM = ±13.5 V 108 128 108 128 dB
Power Supply Rejection PSR VS = ±2.5 V to ±20 V 108 126 108 128 dB
Input Voltage Range
Output Voltage Swing VO RL = 10 kΩ ±13 ±14 ±13 ±14 V
Slew Rate SR 0.05 0.15 0.05 0.15 V/μs
Supply Current ISY 400 800 400 800 μA
Supply Voltage VS Operating range ±2.5 ±15 ±20 ±2.5 ±15 ±20 V

1

Guaranteed by CMR test.

OS

1

IVR ±13.5 ±14.0 ±13.5 ±14.0 V

Rev. F | Page 4 of 16

OP97

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ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings apply to both DICE and packaged
parts, unless otherwise noted.

Table 3.

Parameter Rating

Supply Voltage ±20 V
Input Voltage1 ±20 V
Differential Input Voltage2 ±1 V
Differential Input Current2 ±10 mA
Output Short-Circuit Duration Indefinite
Operating Temperature Range
OP97E, OP97F (P, S)
Storage Temperature Range −65°C to +150°C
Junction Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 60 sec) 300°C

1

For supply voltages less than ±20 V, the absolute maximum input voltage is

equal to the supply voltage.

2

The inputs of the OP97 are protected by back-to-back diodes. Current-

limiting resistors are not used in order to achieve low noise. Differential
input voltages greater than 1 V cause excessive current to flow through the
input protection diodes unless limiting resistance is used.

−40°C to +85°C

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; 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.

THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.

Tab l e 4

.

Package Type θ

8-Lead PDIP (P Suffix) 103 43 °C/W
8-Lead SOIC (S Suffix) 158 43 °C/W

1

θJA is specified for worst-case mounting conditions, that is, θJA is specified for
device in socket for PDIP package; θJA is specified for device soldered to
printed circuit board for SOIC package.

1

θJC Unit

JA

ESD CAUTION

Rev. F | Page 5 of 16