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The voice-band audio processor (VBAP) is designed to perform the transmit encoding analog/digital (A/D) conversion and receive decoding digital/analog (D/A) conversion, together with transmit and receive filtering for voice-band communications systems.
The device operates in either the 13-bit linear or 8-bit companded m-law mode, which is selectable through the I2C interface.
From a 2.048-MHz master clock input, the VBAP generates its own internal clocks.
The TWL1101 device is characterized for operation from 40°C to 85°C.
` 3-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 13-Bit Linear Data or 8-Bit Companded (-Law) Data ` Available in a 48-Pin TQFP Package, a 64-Pin *BGA Package, and a ` Designed for Analog and Digital Wireless Handsets and Telecommunications Applications ` TX Channel AGC Function Available Through PCM Interface or I2C Bus