GENERAL 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.

FEATURES

? Single power supply : +2.7 V to +3.6 V

? Low power consumption

Operating mode : 24 mW Typ.

Power down mode : 0.05 mW Typ.

? Digital signal input/output interface : 14-bit serial code in 2s complement format

? Sampling frequency(fs) : 4 to 16 kHz

? Transmission clock frequency : fs x 14 min., 2048 kHz max.

? Filter characteristics : 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 kΩ ; an amplitude of a maximum of 4.0 VPP with push-pull driving.

? Built-in reference voltage supply

? Package options:

32-pin plastic TSOP (TSOPI32-P-814-0.50-1K) (Product name : MSM7716TS-K)

30-pin plastic SSOP (SSOP30-P-56-0.65-K) (Product name : MSM7716GS-K)