PIN CONNECTIONS

8-Lead Narrow-Body SO

8-Lead Epoxy DIP

(S Suffix)

(P Suffix)

OUT A

–IN A

+IN A

V–

V+

OUT B

–IN B

+IN B

1

2

3

4

5

6

7

8

OP295

OUT A

–IN A

+IN A

V–

V+

OUT B

–IN B

+IN B

1

2

3

45

6

7

8

OP295

14-Lead Epoxy DIP

16-Lead SO (300 Mil)

(P Suffix)

(S Suffix)

OUT A

–IN A

+IN A

V–

OUT B

–IN D

+IN D

OUT D

–IN B

+IN B

V+

OUT C

–IN C

+IN C

1

2

3

4

11

12

13

14

OP495

5

6

7

8

9

10

OUT A

–IN A

+IN A

V–

OUT D

–IN D

+IN D

OUT B

–IN B

+IN B

NC

V+

OUT C

–IN C

+IN C

1

2

3

413

14

15

16

5

6

7

89

10

11

12

OP495

NC

NC = NO CONNECT

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.

a

Dual/Quad Rail-to-Rail

Operational Amplifiers

OP295/OP495

© Analog Devices, Inc., 1995

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

FEATURES

Rail-to-Rail Output Swing

Single-Supply Operation: +3 V to +36 V

Low Offset Voltage: 300

V

Gain Bandwidth Product: 75 kHz

High Open-Loop Gain: 1000 V/mV

Unity-Gain Stable

Low Supply Current/Per Amplifier: 150

A max

APPLICATIONS

Battery Operated Instrumentation

Servo Amplifiers

Actuator Drives

Sensor Conditioners

Power Supply Control

GENERAL DESCRIPTION

Rail-to-rail output swing combined with dc accuracy are the key

features of the OP495 quad and OP295 dual CBCMOS opera-

tional amplifiers. By using a bipolar front end, lower noise and

higher accuracy than that of CMOS designs has been achieved.

Both input and output ranges include the negative supply, pro-

viding the user “zero-in/zero-out” capability. For users of 3.3

volt systems such as lithium batteries, the OP295/OP495 is

specified for three volt operation.

Maximum offset voltage is specified at 300

µV for +5 volt opera-

tion, and the open-loop gain is a minimum of 1000 V/mV. This

yields performance that can be used to implement high accuracy

systems, even in single supply designs.

The ability to swing rail-to-rail and supply +15 mA to the load

makes the OP295/OP495 an ideal driver for power transistors

and “H” bridges. This allows designs to achieve higher efficien-

cies and to transfer more power to the load than previously pos-

sible without the use of discrete components. For applications

that require driving inductive loads, such as transformers, in-

creases in efficiency are also possible. Stability while driving

capacitive loads is another benefit of this design over CMOS

rail-to-rail amplifiers. This is useful for driving coax cable or

large FET transistors. The OP295/OP495 is stable with loads in

excess of 300 pF.

The OP295 and OP495 are specified over the extended indus-

trial (–40

°C to +125°C) temperature range. OP295s are avail-

able in 8-pin plastic and ceramic DIP plus SO-8 surface mount

packages. OP495s are available in 14-pin plastic and SO-16

surface mount packages. Contact your local sales office for

MIL-STD-883 data sheet.