TLC542C, TLC542I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 INPUTS
SLAS075A – FEBRUARY 1989 – REVISED MARCH 1995
8-Bit Resolution A/D Converter
DW OR N PACKAGE
(TOP VIEW)
Microprocessor Peripheral or Stand-Alone
Operation
On-Chip 12-Channel Analog Multiplexer
Built-in Self-Test Mode
INPUT A0
INPUT A1
INPUT A2
INPUT A3
INPUT A4
INPUT A5
INPUT A6
INPUT A7
INPUT A8
GND
V
CC
EOC
I/O CLOCK
ADDRESS INPUT
DATA OUT
CS
REF+
REF–
INPUT A10
INPUT A9
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Software-Controllable Sample and Hold
Total Unadjusted Error . . . ±0.5 LSB Max
Direct Replacement for Motorola
MC145041
On-Board System Clock
End-of-Conversion (EOC) Output
Pinout and Control Signals Compatible
With the TLC1542/3 10-Bit A/D Converters
FN PACKAGE
(TOP VIEW)
CMOS Technology
PARAMETER
Channel Acquisition/Sample Time
Conversion TIme (Max)
VALUE
16 µs
20 µs
3
Samples per Second (Max)
Power Dissipation (Max)
25 × 10
10 mW
3
2
1
20 19
18
I/O CLOCK
INPUT A3
4
5
6
7
8
ADDRESS INPU
DATA OUT
CS
INPUT A4
INPUT A5
INPUT A6
INPUT A7
17
description
16
15
14
The TLC542 is a CMOS converter built around an
8-bit switched-capacitor successive-approximation
analog-to-digital converter. The device is designed
for serial interface to a microprocessor or peripheral
via a 3-state output with three inputs [including I/O
CLOCK, CS (chip select), and ADDRESS INPUT].
The TLC542 allows high-speed data transfers and
sample rates of up to 40,000 samples per second.
In addition to the high-speed converter and
versatile control logic, an on-chip 12-channel
REF+
9 10 11 12 13
analog multiplexer can sample any one of 11 inputs or an internal “self-test” voltage, and the sample and hold
is started under microprocessor control. At the end of conversion, the end-of-conversion (EOC) output pin goes
high to indicate that conversion is complete. Detailed information on interfacing to most popular
microprocessors is readily available from the factory.
AVAILABLE OPTIONS
PACKAGE
T
A
CHIP CARRIER
(FN)
PLASTIC DIP
(N)
SMALL OUTLINE
(DW)
0°C to 70°C
—
TLC542CN
TLC542IN
TLC542CDW
TLC542IDW
–40°C to 85°C
TLC542IFN
Copyright 1995, 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265