The PCM codec is designed to perform transmit encoding analog/digital (A/D) conversion, receive decoding digital/analog (D/A) conversion, and transmit and receive filtering for voice-band communications systems. The device operates in either the 15-bit linear or 8-bit companded (u-law or A-Law) mode, which is selectable through the I2C interface. The PCM codec generates its own internal clocks from a 2.048-MHz master clock input.
2.7-V Operation
Two Differential Microphone Inputs, One Differential Earphone Output, and One Single-Ended Earphone Output
Programmable Gain Amplifiers for Transmit, Receive, Sidetone, and Volume Control
Earphone Mute and Microphone Mute
On-Chip I2C Bus, Which Provides a Simple, Standard, Two-Wire Serial Interface With Digital ICs
Programmable for 15-Bit Linear Data or 8-Bit Companded (u-Law or A-Law) Data
Available in a 32-Pin Thin Quad Flatpack (TQFP) Package and an 80-Pin GQE MicroStar Junior™ Ball Grid Array (BGA)
Designed for Analog and Digital Wireless Handsets and Telecommunications Applications
Dual-Tone Multifrequency (DTMF) and Single Tone Generator
Pulse Density Modulated (PDM) Buzzer Output
APPLICATIONS
- Digital Handset
- Digital Headset
- Cordless Phones
- Digital PABX
- Digital Voice Recording
