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Description

The MSM7716 is a single-channel, CODEC CMOS IC for voice signals that contains filters for linear A/D and D/A conversion.

Designed especially for a single-power supply and low-power applications, the device is optimized for applications for the analog interfaces of audio signal processing DSPs and digital wireless systems.

The analog output signal can directly drive a ceramic type handset receiver. In addition, levels for analog outputs can be set by external control.

Block Diagram

Features

»	Single power supply: +2.7 V to +3.6 V
»	Low-power consumption increases battery life »  Operating mode: 24 mW, Typ. »  Power-down mode: 0.05 mW, Typ.
»	Digital signal input/output interface: 14-bit serial code in 2's complement format
»	Sampling frequency (fs): 4 to 16 kHz
»	Transmission clock frequency: fs x 14 min., 2048 kHz max.
»	Filter characterisitics: when fs = 8 kHz, complies with ITU-T Recommendation G.714
»	Built-in PLL eliminates a master clock
»	Two input circuits in transmit section
»	Two output circuits in receive section
»	Transmit gain adjustable using an external resistor
»	Receive gain adjustable by external control 8 steps, 4 dB/step
»	Transmit mic-amp is eliminated by the gain setting of a maximum of 36 dB
»	Analog outputs can drive a load of a minimum of 1 k; an amplitude of a maximum of 4.0 VPP with push-pull driving
»	Built-in reference voltage supply
»	Package Options: »  32-pin plastic TSOP (TSOP32-P-814-0.50-K) (Product name: MSM7716TS-K) »  30-pin plastic SSOP (SSOP30-P-56-0.65-K) (Product name: MSM7716GS-K)