TWL1101 Datasheet, PDF (1/31 Pages) Texas Instruments – VOICE-BAND AUDIO PROCESSOR

TWL1101
VOICE-BAND AUDIO PROCESSOR (VBAP™)
D 3-V Operation
D Two Differential Microphone Inputs, One
Differential Earphone Output, and One
Single-Ended Earphone Output
D Programmable Gain Amplifiers for
Transmit, Receive, Sidetone, and Volume
Control
D Earphone Mute and Microphone Mute
D On-chip I²C-Bus, Which Provides a Simple,
Standard, Two-Wire Serial Interface with
Digital ICs
SLWS074A – MAY 1998 REVISED MARCH 1999
D Programmable for 13-Bit Linear Data or
8-Bit Companded (µ-Law) Data
D Available in a 48-Pin TQFP Package, a
64-Pin µ*BGA Package, and a
D Designed for Analog and Digital Wireless
Handsets and Telecommunications
Applications
D TX Channel AGC Function Available
Through PCM Interface or I²C Bus
description
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 µ-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.
This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These
circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C,
Method 3015; however, it is advised that precautions be taken to avoid application of any voltage higher than maximum-rated
voltages to these high-impedance circuits. During storage or handling, the device leads should be shorted together or the device
should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriated logic voltage level,
preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication Guidelines for
Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and Assemblies available from Texas Instruments.
VBAP is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1999, Texas Instruments Incorporated
1