VBAP™ (Voice-band Audio Processor) Summary Description

• A single chip, single rail audio PCM CODEC that provides all the filtering and frame sync timing necessary for a standard voice channel.
• Standard serial interface to a TMS320 or any other standard DSP. Transmit and receive directions can be operated independently.
• Direct interface to both a piezo speaker and an electret microphone.
• Operates from a single 5V or 3V supply.
• Transmit encoding (A/D conversion) & receive decoding (D/A conversion) with transmit and receive filtering and framing.
• The family of devices is pin-selectable for either 8-bit companded µ-law and A-law or 13-bit (dynamic range) linear mode. Companding modes: most US products use µ-Law, most European products use A-Law.

VBAP™ End Uses

• Virtually any application in which the human voice requires a digital interface within std. voice band -- with TI's or any other industry-standard Digital Signal Processor (DSP).
• Main Focus: Digital cellular telephone systems. 3V VBAP best for handhelds; 5V best for mobile & "bag" phones.
• Secondary Markets Multimedia applications for personal computers. Speakerphones Digital Telephone Answering Devices (DTAD) Two-way voice pagers
• Emerging Market: Personal base stations for wireless PBX/local loop- plug into normal wall outlets, for which the 5V VBAP is an effective choice.