TLC320V343 Datasheet, PDF (1/30 Pages) Texas Instruments – SINGLE-SUPPLY ANALOG INTERFACE CIRCUIT

TLC320V343
SINGLE-SUPPLY ANALOG INTERFACE CIRCUIT
D General-Purpose Signal-Processing Analog
Front End (AFE)
D Single 5-V Power Supply
D Power Dissipation . . . 100 mW Typ
D Signal-to-Distortion Ratio . . . 70 dB Typ
D Serial-Port Interface
SLAS159 – MARCH 1997
D Differential Outputs Drive 3-V Peak into a
600-Ω Differential Load
D Differential Architecture Throughout
D 1-µm Advanced LinEPIC™ Process
D 14-Bit Dynamic Range ADC and DAC
D 2s-Complement Data Format
description
The TLC320V343 analog interface circuit (AIC) is an audio-band processor that provides an analog-to-digital
and digital-to-analog input/output interface system on a single monolithic CMOS chip. This device integrates
a band-pass switched-capacitor antialiasing input filter, a 14-bit-resolution analog-to-digital converter (ADC),
a 14-bit-resolution digital-to-analog converter (DAC), a low-pass switched-capacitor output-reconstruction filter,
(sin x)/x compensation, and a serial port for data and control transfers.
The internal circuit configuration and performance parameters are determined by reading control information
into the eight available data registers. The register data sets up the device for a given mode of operation and
application.
The major functions of the TLC320V343 are:
D To convert audio-signal data to digital format by the ADC channel
D To provide the interface and control logic to transfer data between its serial input and output terminals and
a DSP or microprocessor
D To convert received digital data back to an audio signal through the DAC channel
The antialiasing input low-pass filter is a switched-capacitor filter with a sixth-order elliptic characteristic. The
high-pass filter is a single-pole filter to preserve low-frequency response as the low-pass filter cutoff is adjusted.
There is a 3-pole continuous time filter that precedes this filter to eliminate any aliasing caused by the filter clock
signal.
The output-reconstruction switched-capacitor filter is a sixth-order elliptic transitional low-pass filter followed by
a second-order (sin x)/x correction filter. This filter is followed by a 3-pole continuous time filter to eliminate
images of the filter clock signal.
The AIC consists of two signal processing channels, an ADC channel and a DAC channel, and the associated
digital control. The two channels operate synchronously; data reception at the DAC channel and data
transmission from the ADC channel occur during the same time interval. The data transfer is in 2s-complement
format.
Typical applications for this device include modems, speech processing, analog interface for digital-signal
processors (DSPs), industrial process control, acoustical signal processing, spectral analysis, data acquisition,
and instrumentation recorders.
The TLC320V343 is characterized for operation from 0°C to 70°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
LinEPIC 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 © 1997, Texas Instruments Incorporated
1