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參數資料
| 型號： | W9321 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 編解碼器 |
| 英文描述： | ADPCM Codec(ADPCM編解碼器) |
| 中文描述： | MU-LAW, ADPCM CODEC, PDIP28 |
| 封裝： | PLASTIC, DIP-28 |
| 文件頁數： | 2/35頁 |
| 文件大小： | 457K |
| 代理商： | W9321 |
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Preliminary W9321
- 2 -
1. GENERAL DESCRIPTION
The Winbond ADPCM Codec is a single channel chip incorporating a
Σ
PCM codec filter with a 32K,
24K, 16K ADPCM encoder/decoder complying with the CCITT G.721 and G.726 standards. In
addition, this chip also meets the PCM conformance specification of the CCITT G.714
recommendation.
This chip allows full-duplex operation over a wide voltage range from 2.7 to 5.25 volts; it's low power
consumption makes it ideal for battery or AC powered applications. The chip includes a serial setup
port (SSP) interface with a 16 byte setup and status registers. A microcontroller can access many
built-in features through the SSP interface. In addition, this chip also consists of some OP amplifiers
integrated with a
Σ
PCM codec-filter to allow for easy control of the analog interface.
This chip can be used on two key applications. One application is for wireless telephone systems such
as CT2, DECT. Another application is for public switch telephone network (PSTN) applications such
as pair gain. See the section on application information for more details.
2. FEATURES
Single 2.7 to 5.25 volt power supply
Master clock rate: 10.24 MHz oscillator typically for Winbond cordless system
Typical power consumption of 85 mW for 3 volt; power down of 0.2 mW
Full-duplex single channel speech codec
Linear 14 bit
Σ
PCM codec-filter for A/D and D/A converter
Complete Mu-Law and A-Law companding
ADPCM transcoder for 64, 32, 24, and 16 Kbps bit rates
Serial PCM/ADPCM transfer data rate from 128 to 2048 Kbps
Universal programmable dual tone generator such as DTMF application
Noise burst detection algorithm for ADPCM receive path
Analog input: differential OP amplifier with external gain adjustment for microphone interface
Programmable transmit gain, receive attenuation, and sidetone gain
Analog output:
Differential power driver with 300
load and external gain adjustment
Differential auxiliary driver with 300
load for ringer interface
3 Volt regulator for digital circuit
5 Volt charge pump for analog circuit low voltage applications
16 Setup and status registers with 8 bits for monitoring microcontroller applications
Packaged in 28-pin DIP/SOP
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