REV. C

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a

OP270

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

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© 2003 Analog Devices, Inc. All rights reserved.

Dual Very Low Noise Precision

Operational Amplifier

FEATURES

Very Low Noise 5 nV/

÷÷÷÷÷Hz @ 1 kHz Max

Excellent Input Offset Voltage 75

V Max

Low Offset Voltage Drift 1

V/ C Max

Very High Gain 1500 V/mV Min

Outstanding CMR 106 dB Min

Slew Rate 2.4 V/ s Typ

Gain Bandwidth Product 5 MHz Typ

Industry-Standard 8-Lead Dual Pinout

SIMPLIFIED SCHEMATIC

(One of Two Amplifiers Is Shown)

–IN

+IN

BIAS

V+

OUT

V–

GENERAL DESCRIPTION

The OP270 is a high performance, monolithic, dual operational

amplifier with exceptionally low voltage noise, 5 nV/

÷Hz max at

1 kHz. It offers comparable performance to ADI’s industry

standard OP27.

The OP270 features an input offset voltage below 75

mV and an

offset drift under 1

mV/∞C, guaranteed over the full military tem-

perature range. Open-loop gain of the OP270 is over 1,500,000

into a 10 k

W load, ensuring excellent gain accuracy and linearity,

even in high gain applications. Input bias current is under 20 nA,

which reduces errors due to signal source resistance. The OP270’s

CMR of over 106 dB and PSRR of less than 3.2

mV/V signifi-

cantly reduce errors due to ground noise and power supply

fluctuations. Power consumption of the dual OP270 is one-third

less than two OP27s, a significant advantage for power conscious

applications. The OP270 is unity-gain stable with a gain bandwidth

product of 5 MHz and a slew rate of 2.4 V/

ms.

The OP270 offers excellent amplifier matching, which is important

for applications such as multiple gain blocks, low noise instru-

mentation amplifiers, dual buffers, and low noise active filters.

The OP270 conforms to the industry-standard 8-lead DIP pinout.

It is pin compatible with the MC1458, SE5532/A, RM4558, and

HA5102 dual op amps, and can be used to upgrade systems

using those devices.

For higher speed applications, the OP271, with a slew rate of

8V/

ms, is recommended. For a quad op amp, see the OP470.

CONNECTION DIAGRAMS

16-Lead SOIC

(S-Suffix)

1

2

3

4

5

6

7

8

NC = NO CONNECT

–IN A

16

15

14

13

12

11

10

9

+IN A

NC

V–

NC

+IN B

–IN B

NC

OUT A

NC

NC

V+

NC

NC

OUT B

NC

OP270

8-Lead PDIP (P-Suffix)

8-Lead CERDIP

(Z-Suffix)

1

2

3

4

OUT A

8

7

6

5

–IN A

+IN A

V–

V+

OUT B

–IN B

+IN B

A

B

OP270