BA3121 Rohm Semiconductor, BA3121 Datasheet

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BA3121

Manufacturer Part Number
BA3121
Description
IC AMP AUDIO STER AB 8DIP
Manufacturer
Rohm Semiconductor
Type
Class ABr
Datasheet

Specifications of BA3121

Output Type
2-Channel (Stereo)
Voltage - Supply
4 V ~ 18 V
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Max Output Power X Channels @ Load
-

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The BA3121,BA3121F and BA3121N are ground isolation amplifiers developed for use in car audio applications. These
ICs 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.
FApplications
Car audio systems
FFeatures
1) Large capacitors not required
2) High common-mode rejection ratio
3) Low noise (V
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
Ground isolation amplifier
BA3121 / BA3121F / BA3121N
Audio ICs
(57dB typ. at f = 1kHz).
NO
= 3.5 Vrms Typ.).
4) Low distortion (THD = 0.002% Typ.).
5) Two channels.
717

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BA3121 Summary of contents

Page 1

... Ground isolation amplifier BA3121 / BA3121F / BA3121N The BA3121,BA3121F and BA3121N are ground isolation amplifiers developed for use in car audio applications. These ICs 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 ...

Page 2

... Audio ICs FBlock diagrams 718 BA3121 / BA3121F / BA3121N ...

Page 3

... Audio ICs FElectrical characteristics (unless otherwise noted 25_C, V BA3121 / BA3121F / BA3121N = 12V 1kHz 1. 719 ...

Page 4

... Audio ICs FMeasurement circuits 720 BA3121 / BA3121F / BA3121N ...

Page 5

... However, due to mismatching between the resistors, difference in the noise voltages (e tolerances in the operational amplifier, a noise voltage does result. With the BA3121, the elimination level of the noise is ex- 1 pressed as: CMMR = 20log (e Therefore, CMRR y 41dB can be guaranteed. FOperation notes (1) Maintain a ratio for the values of the capaci- tors connected to pin 2 (V ripple rejection ratio stable ...

Page 6

... Audio ICs FApplication example 722 BA3121 / BA3121F / BA3121N ...

Page 7

... Audio ICs FElectrical characteristics curves BA3121 / BA3121F / BA3121N 723 ...

Page 8

... Audio ICs 724 BA3121 / BA3121F / BA3121N ...

Page 9

... Audio ICs FExternal dimensions (Units: mm) BA3121 / BA3121F / BA3121N 725 ...

Page 10

Audio ICs MEMO 726 ...

Page 11

Audio ICs MEMO 727 ...

Page 12

Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...

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