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Rohm Semiconductor Electronic Components Datasheet

BA3308 Datasheet

Dual preamplifier with ALC

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BA3308 pdf
Audio ICs
Dual preamplifier with ALC
BA3308 / BA3308F / BA3308FV
The BA3308, BA3308F and BA3308FV are dual preamplifier ICs with built-in ALC circuits, and have been designed for
use in stereo radio-cassette recorders and tape recorders. They come in compact 9-pin SIP (BA3308), 14-pin MF
(BA3308F) and 14-pin SSOP (BS3308FV) packages, and have two record / playback preamplifiers, and an ALC circuit.
The preamplifiers have high gain and low distortion, and can be directly coupled to the tape head without coupling capaci-
tors. This prevents tape head magnetization and “pop” noise generation.
A built-in rectifier means that an ALC circuit with good channel balance and large dynamic range can be constructed
with addition of just an external time constant circuit.
The ICs also include power-on mute circuits that suppress “pop” noise generation.
FApplications
Stereo radio cassette recorders, cassette decks and
home stereo systems and music centers
FFeatures
1) Built-in ALC rectifier diode.
2) Wide operating power supply voltage range (VCC =
4.5V to 14V).
3) Low current dissipation (IQ = 3.5mV).
4) High gain (GVO = 80dB).
5) Low distortion (THD = 0.1%).
6) Low noise (VNIN = 1µVrms)
7) Input coupling capacitors and not necessary.
8) Good ALC channel balance.
9) Power-on mute circuit.
10) ALC dynamic range can be varied by the addition
of an external input resistor.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
193


Rohm Semiconductor Electronic Components Datasheet

BA3308 Datasheet

Dual preamplifier with ALC

No Preview Available !

BA3308 pdf
Audio ICs
FBlock diagram
BA3308 / BA3308F / BA3308FV
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 7.0V, f = 1kHz and BPF: 20Hz to 20kHz)
194


Part Number BA3308
Description Dual preamplifier with ALC
Maker Rohm
Total Page 8 Pages
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