PIN CONNECTIONS

REV. D

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 Single-Supply

Audio Operational Amplifier

SSM2135

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

Tel: 617/329-4700

Fax: 617/326-8703

FEATURES

Excellent Sonic Characteristics

High Output Drive Capability

5.2 nV/

√Hz Equivalent Input Noise @ 1 kHz

3.5 MHz Gain Bandwidth

Unity-Gain Stable

Low Cost

APPLICATIONS

Multimedia Audio Systems

Microphone Preamplifier

Headphone Driver

Differential Line Receiver

Balanced Line Driver

Audio ADC Input Buffer

Audio DAC l-V Converter and Filter

Pseudo-Ground Generator

GENERAL DESCRIPTION

The SSM2135 Dual Audio Operational Amplifier permits

excellent performance in portable or low power audio systems,

with an operating supply range of +4 V to +36 V or

±2 V to

±18 V. The unity gain stable device has very low voltage noise

of 4.7 nV/

√Hz, and total harmonic distortion plus noise below

0.01% over normal signal levels and loads. Such characteristics

are enhanced by wide output swing and load drive capability. A

unique output stage* permits output swing approaching the rail

under moderate load conditions. Under severe loading, the

SSM2135 still maintains a wide output swing with ultralow

distortion.

Particularly well suited for computer audio systems and

portable digital audio units, the SSM2135 can perform

preamplification, headphone and speaker driving, and balanced

line driving and receiving. Additionally, the device is ideal for

input signal conditioning in single-supply sigma-delta analog-

to-digital converter subsystems such as the AD1878/AD1879.

The SSM2135 is available in 8-lead plastic DIP and SOIC

packages, and is guaranteed for operation over the extended

industrial temperature range of –40

°C to +85°C.

*Protected by U. S. Patent No. 5,146,181.

SSM2135

V+

OUT B

–IN B

+IN B

OUT A

–IN A

+IN A

V–/GND

SSM2135

OUT A

–IN A

+IN A

V–/GND

1

2

3

4

8

7

6

5

V+

OUT B

–IN B

+IN B

(S Suffix)

(P-Suffix)

8-Lead Narrow-Body SOIC

8-Lead Epoxy DIP

FUNCTIONAL BLOCK DIAGRAM

9V 9V

+IN

–IN

OUT

V+

V–/GND