TI PCM3500E/2K

A low cost, 16-bit CODEC designed for modem Analog Front End (AFE) and speech processing applications. Its low power operation from +2.7V to +3.6V power supplies, along with an integrated power-down mode, make it ideal for portable applications.

It integrates all of the functions needed for a modem or voice CODEC, including delta-sigma digital-to-analog and analog-to-digital converters, input anti-aliasing filter, digital high-pass filter for DC blocking, and an output low-pass filter. The synchronous serial interface provides for a simple, or glue-free interface to popular DSP and RISC processors. The serial interface also supports Time Division Multiplexing (TDM), allowing up to four CODECs to share a single 4-wire serial bus.

• 16-Bit Delta-Sigma DAC and ADC
• Designed for modem Analog Front End: Supports up to 56kbps Operation
• Analog Performance: Sampling Frequency: 7.2kHz to 26kHz, Dynamic Range: 88dB (typ) at fS = 8kHz, fIN = 1kHz
• System Clock: 512fS
• Master or Slave Operation
• On-chip Crystal Oscillator Circuit
• ADC-to-DAC Loop-back Mode
• Time Slot Mode Supports up to Four CODECs on a Single Serial Interface
• Power-down Mode: 60μA (typ)
• Power Supply: Single +2.78 to +3.68
• Small Package: SSOP-24

• Software modems for: Personal Digital Assistant, Notebook and Hand-Held PCs, Set-Top Box, Digital Television, Embedded Systems
• Portable Voice Recorder/Player
• Speech Recognition/Synthesis
• Teleconferencing Products