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BA3308

Rohm
Part Number BA3308
Manufacturer Rohm
Description Dual preamplifier
Published Apr 1, 2005
Detailed Description Audio ICs Dual preamplifier with ALC BA3308 / BA3308F / BA3308FV The BA3308, BA3308F and BA3308FV are dual preamplifier...
Datasheet PDF File BA3308 PDF File

BA3308
BA3308

Overview
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 capacitors.
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%).
FAbsolute maximum ratings (Ta = 25_C) 6) 7) 8) 9) 10) Low noise (VNIN = 1µVrms) Input coupling capacitors and not necessary.
Good ALC channel balance.
Power-on mute circuit.
ALC dynamic range can be varied by the addition of an external input resistor.
FRecommended operating conditions (Ta = 25_C) 193 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 Audio ICs FMeasurement circuit BA3308 / BA3308F / BA3308FV FApplication example FApplication example circuit PCB (copper side) 195 Audio ICs FTotal application circuit BA3308 / BA3308F / BA3308FV FCircuit operation (1) Recording (1) Recording amplifier (See Fig.
5) The channel 1 and 2 amplifier input stages of the BA3308 (pins 8 and 2) can be direct...


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