ROHM Semiconductor BA3402
The BA3402 is a dual preamplifier developed for auto-reverse car tape decks. The circuit is designed in such a way that coupling capacitors are not required. 230 Audio ICs (4) Capacitor for prevention of oscillation and RF mixing With the BA3402, a capacitor must be connected between each input pin and the bias pins to prevent oscillation and RF mixing.| Part No. | BA3402 |
|---|---|
| Datasheet | BA3402 Download |
| Manufacturer |  ROHM Semiconductor |
| Description | Dual Channel Auto Reverse Tape Preamplifier |
| Buy | Stock & Price |
Audio ICs Dual-channel, auto-reverse tape preamplifier BA3402 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 requirements, and improved assembly efficiency when compared with conventional mechanical switches. In addition to reducing the number of external components 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 switching 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 requirements. 6) Low “pop” noise during head switching. 7) Emitter-follower output circuit with large drive capacity.
