BA3313L [ROHM]
Dual preamplifier with ALC detector circuit; 双前置放大器ALC检测电路
| 型号： | BA3313L |
| 厂家： | 
ROHM |
| 描述： | Dual preamplifier with ALC detector circuit |
| 文件： | 总5页 (文件大小：68K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Audio ICs
Dual preamplifier with ALC detector
circuit
BA3313L
The BA3313L is a dual preamplifier IC with built-in ALC detector circuit, designed for use in stereo radio cassette record-
ers. It comes in a compact 12-pin ZIP package, and has two record/playback preamplifiers, and an ALC detector circuit.
The preamplifiers can be directly coupled to the tape head without coupling capacitors to prevent tape head magnetiza-
tion and “pop” noise generation.
With the built-in ALC detector circuit, an ALC circuit with large dynamic range can be constructed with addition of just
an external time constant circuit.
FApplications
Stereo radio cassette recorders
FFeatures
1) Input bias circuit does not require coupling capaci-
tors.
3) Wide operating power supply voltage range.
4) High gain.
2) Built-inALC circuit with external time constant circuit.
5) Low noise.
FBlock diagram
217
Audio ICs
BA3313L
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 8V and f= 1kHz)
218
Audio ICs
BA3313L
FMeasurement circuit
219
Audio ICs
BA3313L
FApplication example
FOperation notes (the resistor marked with an asterisk)
Changing the input resistor Rg, and the ALC time
constant influences the ALC transient characteristics. In
particular, ifRgislessthan3.9kΩ orthetimeconstantca-
pacitor is less than 47µF, the ALC may operate exces-
sively. Do not use smaller values than those recom-
mended for these components.
220
Audio ICs
BA3313L
FElectrical characteristics curve
FExternal dimensions (Units: mm)
221
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