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2009.08 - Rev.A

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Audio Accessory IC Series

Ground Isolation

Amplifier

BA3121F, BA3123F

●Description

The BA3121F/BA3123F are ground isolation amplifiers developed for use in car audio applications.

This IC efficiently eliminate problems caused by wiring resistance, and remove noise generated by the electrical devices

used in automobiles. The capacitance values of the external capacitors required for the ICs are small to allow compact

and reliable set design.

●Features

1) Large capacitors not required

2) High common-mode rejection ratio (57dB typ. at f = 1kHz).

3) Low noise (VNO = 3.5

μVrms Typ.).

4) Low distortion (THD = 0.002% Typ.).

5) Two channels.

●Applications

Car audio systems

●Line up matrix

BA3121F

BA3123F

Operation temperature

－30～＋85

C

－40～＋85

C

●Absolute maximum ratings (Ta = 25

C)

Parameter

Symbol

Limits

Unit

Power supply voltage

Vcc

18

V

Power dissipation

Pd

450*

mW

Operation

temperature

BA3121F

Topr

－30～＋85

℃

BA3123F

－40～＋85

℃

Storage temperature

Tstg

－55～＋125

℃

＊Reduced by 4.5mW in Ta of 1

C over 25C.

●Recommended operating conditions (Ta = 25

C)

Parameter

Symbol

Min.

Typ.

Max.

Unit

Power supply voltage

Vcc

4

12

18

V

No.09092EAT01