TLC32040M
ANALOG INTERFACE CIRCUIT
SGLS031 – MAY 1990
• Advanced LinCMOS Silicon-Gate Process
J PACKAGE
(TOP VIEW)
Technology
• 14-Bit Dynamic Range ADC and DAC
NU
RESET
EODR
NU
NU
IN+
IN–
AUX IN+
AUX IN–
OUT+
OUT–
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
• Variable ADC and DAC Sampling Rate up to
2
19200 Samples Per Second
3
• Switched-Capacitor Antialiasing Input Filter
FSR
DR
MSTR CLK
4
and Output-Reconstruction Filter
5
• Serial Port for Direct Interface to
SMJ320E14, SMJ32020, SMJ320C25, and
SMJ320C30 Digital Processors
6
V
7
DD
REF
DGTL GND
SHIFT CLK
EODX
8
• Synchronous or Asynchronous ADC and
DAC Conversion Rates With Programmable
Incremental ADC and DAC Conversion
Timing Adjustments
V
9
CC+
V
10
11
12
13
14
CC–
ANLG GND
ANLG GND
NU
DX
• Serial Port Interface to SN54299
WORD/BYTE
FSX
Serial-to-Parallel Shift Register for Parallel
Interface to SMJ320C10, SMJ320C15,
SMJ320E15, or Other Digital Processors
NU
FK PACKAGE
(TOP VIEW)
description
The TLC32040M interface circuit is a complete
analog-to-digital and digital-to-analog input/
output system on a single monolithic CMOS
4
3 2 1 28 27 26
chip. This device integrates
switched-capacitor antialiasing input filter, a
14-bit-resolution A/D converter, four
a
band-pass
5
DR
MSTR CLK
IN–
AUX IN+
AUX IN–
25
24
23
6
7
V
DD
microprocessor-compatible serial port modes, a
14-bit-resolution D/A converter, and a low-pass
switched-capacitor output reconstruction filter.
The device offers numerous combinations of
master clock input frequencies and conversion/
sampling rates, which can be changed via digital
processor control.
8
REF
DGTL GND
SHIFT CLK
EODX
22 OUT+
21 OUT–
9
10
11
20
V
V
CC+
CC–
19
12 13 14 15 16 17 18
Typical applications for this integrated circuit
include modems (7.2-, 8-, 9.6-, 14.4-, and
19.2-kHz sampling rate), analog interface for
digital signal processors (DSPs), speech recognition/storage systems, industrial process control, biomedical
NU–Nonusable; no external connection should be made to
these pins.
instrumentation, acoustical signal processing, spectral analysis, data acquisition, and instrumentation
recorders. Four serial modes, which allow direct interface to the SMJ320E14, SMJ32020, SMJ320C25, and
SMJ320C30 digital signal processors, are provided. Also, when the transmit and receive sections of the analog
interface circuit (AIC) are operating synchronously, it will interface to two SN54299 serial-to-parallel shift
registers.These serial-to-parallel shift registers can then interface in parallel to the SMJ320C10, SMJ320C15,
SMJ320E15, other digital signal processors, or external FIFO circuitry. Output data pulses are emitted to inform
the processor that data transmission is complete or to allow the DSP to differentiate between two transmitted
bytes. A flexible control scheme is provided so that the functions of the integrated circuit can be selected and
adjusted coincidentally with signal processing via software control.
Advanced LinCMOS is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Copyright 1990, Texas Instruments Incorporated
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
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