BA3402 Tape Preamplifier Datasheet

BA3402 Datasheet, PDF, Equivalent


Part Number

BA3402

Description

Dual Channel Auto Reverse Tape Preamplifier

Manufacture

Rohm

Total Page 6 Pages
Datasheet
Download BA3402 Datasheet


BA3402
Audio ICs
Dual-channel, auto-reverse
tape preamplifier
BA3402
The BA3402 is a dual preamplifier developed for auto-reverse car tape decks. An electronic switch on the chip switches
between the forward and reverse heads, and this has the benefits of greater reliability, easier wiring, lower space require-
ments, and improved assembly efficiency when compared with conventional mechanical switches. The circuit is de-
signed in such a way that coupling capacitors are not required. In addition to reducing the number of external compo-
nents required, this ensures that the head is not magnetized when the power is applied.
FApplications
Car stereos and play-only auto-reverse cassette decks.
FFeatures
1) Low noise (VNIN = 1.2µVrms).
2) High open loop gain (GVO = 85dB).
3) Reliable electronic switch on the chip. Head switch-
ing for both left and right channels is possible with the
addition of one external switch circuit.
4) Input-side virtual-ground design means that input
coupling capacitors are not required.
FBlock diagram
5) Built-in bias circuit reduces attached component re-
quirements.
6) Low “pop” noise during head switching.
7) Emitter-follower output circuit with large drive capac-
ity.
8) Pin layout allows easy PCB design.
9) Compact package allows high PCB wiring density.
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BA3402
Audio ICs
FInternal circuit configuration
BA3402
FAbsolute maximum ratings (Ta = 25_C)
FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 8V)
227


Features Audio ICs Dual-channel, auto-reverse ta pe preamplifier BA3402 The BA3402 is a dual preamplifier developed for auto-re verse car tape decks. An electronic swi tch on the chip switches between the fo rward and reverse heads, and this has t he benefits of greater reliability, eas ier wiring, lower space requirements, a nd improved assembly efficiency when co mpared with conventional mechanical swi tches. The circuit is designed in such a way that coupling capacitors are not required. In addition to reducing the n umber of external components required, this ensures that the head is not magne tized when the power is applied. FAppl ications Car stereos and play-only auto -reverse cassette decks. FFeatures 1) L ow noise (VNIN = 1.2µVrms). 2) High op en loop gain (GVO = 85dB). 3) Reliable electronic switch on the chip. Head swi tching for both left and right channels is possible with the addition of one e xternal switch circuit. 4) Input-side v irtual-ground design means that input coupling capacitors are no.
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