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BL1302A57

SHANGHAI BELLING
Part Number BL1302A57
Manufacturer SHANGHAI BELLING
Description Monolithic serial interface compiler encoder / filter
Published Dec 20, 2006
Detailed Description BL1302A57/S General Description The BL1302A57/S is an A-law monolithic PCM Pin Assignment CODEC/filter which has the ...
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BL1302A57
BL1302A57

Overview
BL1302A57/S General Description The BL1302A57/S is an A-law monolithic PCM Pin Assignment CODEC/filter which has the A/D and D/A conversion and a serial PCM interface.
The device is fabricated using the advanced double-poly nwell CMOS process.
It is pin compatible with TP3057.
The encode portion of each device consists of an input gain adjust amplifier, an active RC pre-filter which eliminates very high frequency noise prior to entering a switched-capacitor band-pass filter that rejects signals below 200 Hz and above 3400 Hz.
Also included are auto-zero circuitry and a VBB GNDA VFRO VCC FSR DR BCLKR/CLKSEL MCLKR/PDN 1 2 3 4 5 6 7 8 BL1302A57 16 VFXI+ 15 VFXI14 GSX 13 TSX 12 FS X 11 DX 10 BCLKX 9 MCLKX companding coder which samples the filtered signal and encodes it in the companded A-law PCM format.
The decode portion consists of an expanding decoder, which reconstructs the Analog signal from the companded A-law code, a low-pass filter which corrects for the sinx/x respo...


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