Texas Instruments TCM320AC57
The TCM320AC56 and TCM320AC57 voice-band audio processor (VBAP) integrated circuits perform the transmit encoding (A/D conversion) and receive decoding (D/A conversion) together with transmit and receive filtering for voice-band communications systems. These devices are pin-selectable for either of two modes — companded and linear — providing data in two formats.D Single 5-V Operation D Low Power Consumption: – Operating Mode . . . 40 mW Typ – Standby Mode . . . 5 mW Typ – Power-Down Mode . . . 3 mW Typ D Combined A/D, D/A, and Filters D Extended Variable-Frequency Operation – Sample Rates up to 16 kHz – Passband up to 7.2 kHz D Electret Microphone Bias Reference Voltage Available D Drive a Piezo Speaker Directly D Compatible With All Digital Signal Processors (DSPs) description TCM320AC56, TCM320AC57 VOICE-BAND AUDIO PROCESSORS (VBAP) SLWS016A – JUNE 1996 – REVISED APRIL 1997 D Selectable Between 8-Bit Companded and 13-Bit (Dynamic Range) Linear Conversion: – TCM320AC56 . . . µ-Law and Linear Modes – TCM320AC57 . . . A-Law and Linear Modes D Programmable Volume Control in Linear Mode D 300-Hz to 3.6-kHz Passband with Specified Master Clock D Designed for Standard 2.048-MHz Master Clock for U.S. Analog, U.S. Digital, and CT2, DECT, GSM, and PCS Standards for Hand-Held Battery-Powered Telephones DW OR N PACKAGE (TOP VIEW) PDN 1 EARA 2 EARB 3 E...