FUNCTIONAL BLOCK DIAGRAM

SSM2141

–IN

+IN

SENSE

OUTPUT

REFERENCE

25k

Ω

25k

Ω

25k

Ω

25k

Ω

1

3

2

5

7

6

4

PIN CONNECTIONS

8-Pin Plastic Mini-DIP

(P Suffix)

Narrow Body SO

(S Suffix)

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

NC = NO CONNECT

SSM2141

REFERENCE

SENSE

OUTPUT

V+

NC

–IN

+IN

V–

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

High Common-Mode Rejection

Differential Line Receiver

SSM2141

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

Tel: 617/329-4700

Fax: 617/326-8703

GENERAL DESCRIPTION

The SSM2141 is an integrated differential amplifier intended to

receive balanced line inputs in audio applications requiring a

high level of noise immunity and optimum common-mode

rejection. The SSM2141 typically achieves 100 dB of common-

mode rejection (CMR), whereas implementing an op amp with

four off-the-shelf precision resistors will typically achieve only

40 dB of CMR—inadequate for high-performance audio.

The SSM2141 achieves low distortion performance by

maintaining a large slew rate of 9.5 V/

µs and high open-loop

gain. Distortion is less than 0.002% over the full audio

bandwidth. The SSM2141 complements the SSM2142

balanced line driver. Together, these devices comprise a fully

integrated solution for equivalent transformer balancing of

audio signals without the problems of distortion, EMI fields,

and high cost.

Additional applications for the SSM2141 include summing

signals, differential preamplifiers, and 600

Ω low distortion

buffer amplifiers. For similar performance with G = 1/2, see

SSM2143.

FEATURES

High Common-Mode Rejection

DC: 100 dB typ

60 Hz: 100 dB typ

20 kHz: 70 dB typ

40 kHz: 62 dB typ

Low Distortion: 0.001% typ

Fast Slew Rate: 9.5 V/ s typ

Wide Bandwidth: 3 MHz typ

Low Cost

Complements SSM2142 Differential Line Driver

APPLICATIONS

Line Receivers

Summing Amplifiers

Buffer Amplifiers–Drives 600

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