MSM7704-01/02/03
2ch Single Rail CODEC
 

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Applications

Description

The MSM7704-01/7704-02/7704-03 are two-channel CODEC CMOS ICs for voice signals ranging from 300 to 3400 Hz. These devices contain filters for A/D and D/A conversion.

Designed especially for a single-power supply and low-power applications, these devices contain two-channel AD/DA converters in a single chip, and achieve a reduced footprint and a reduced number of external components.

The MSM7704-01/7704-02/7704-03 are best suited for an analog interface to an echo canceller DSP used in digital telephone terminals, digital PABXs, and hands-free terminals.

Block Diagram

Features

»	Single-power supply: +2.7 V to 3.8 V
»	Power consumption »  Operating mode: 30 mW Typ. 50 mW Max. »  Power-saving mode: 3 mW Typ. 6 mW Max. »  Power-down mode: 0.03 mW Typ. 0.3 mW Max.
»	ITU-T Companding law »  MSM7704-01: µ/A-law pin-selectable »  MSM7704-02: µ-law »  MSM7704-03: A-law
»	Built-in PLL eliminates a master clock
»	The PCM interface can be switched between 2 channel serial/parallel
»	Transmission clock: 64/128/256/512/1024/2048 kHz 96/192/384/768/1536/1544/200 kHz (During 2 channel serial mode, the 64 and 96 kHz clocks are disabled)
»	Adjustable transmit gain
»	Built-in reference voltage supply
»	Analog output can directly drive a 1.2 k load
»	Package options: »  24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name : MSM7704-01GS-K) (Product name : MSM7704-02GS-K) (Product name : MSM7704-03GS-K)