Datasheet
TLC540I, TLC541I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 INPUTS
SLAS065B – OCTOBER 1983 – REVISED JUNE 2001
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
8-Bit Resolution A/D Converter
Microprocessor Peripheral or Stand-Alone
Operation
On-Chip 12-Channel Analog Multiplexer
Built-In Self-Test Mode
Software-Controllable Sample and Hold
Total Unadjusted Error ... ±0.5 LSB Max
TLC541 Is Direct Replacement for Motorola
MC145040 and National Semiconductor
ADC0811. TLC540 Is Capable of Higher
Speed
Pinout and Control Signals Compatible
With TLC1540 Family of 10-Bit A/D
Converters
CMOS Technology
PARAMETER TLC540
TLC541
Channel Acquisition Sample Time
Conversion Time (Max)
Samples per Second (Max)
Power Dissipation (Max)
2 µs
9 µs
75 x 10
3
12.5 mW
3.6 µs
17 µs
40 x 10
3
12.5 mW
description
The TLC540 and TLC541 are CMOS A/D
converters built around an 8-bit switched-
capacitor successive-approximation A/D
converters. They are designed for serial interface
to a microprocessor or peripheral via a 3-state
output with up to four control inputs, including
independent SYSTEM CLOCK, I/O CLOCK, chip
select (CS
), and ADDRESS INPUT. A 4-MHz
system clock for the TLC540 and a 2.1-MHz
system clock for the TLC541 with a design that
includes simultaneous read/write operation allow high-speed data transfers and sample rates of up to
75,180samples per second for the TLC540 and 40,000 samples per second for the TLC541. In addition to the
high-speed converter and versatile control logic, there is an on-chip 12-channel analog multiplexer that can be
used to sample any one of 11 inputs or an internal self-test voltage, and a sample-and-hold that can operate
automatically or under microprocessor control.
AVAILABLE OPTIONS
PACKAGE
T
A
SO PLASTIC DIP
(DW)
PLASTIC DIP
(N)
CHIP CARRIER
(FN)
–40°C to 85°C
—
TLC541IDW
TLC540IN
TLC541IN
TLC540IFN
TLC541IFN
–55°C to 125°C — TLC541MN —
Copyright 2001, 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.
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10
20
19
18
17
16
15
14
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12
11
INPUT A0
INPUT A1
INPUT A2
INPUT A3
INPUT A4
INPUT A5
INPUT A6
INPUT A7
INPUT A8
GND
V
CC
SYSTEM CLOCK
I/O CLOCK
ADDRESS INPUT
DATA OUT
CS
REF+
REF–
INPUT A10
INPUT A9
DW OR N PACKAGE
(TOP VIEW)
3 2 1 20 19
910111213
4
5
6
7
8
18
17
16
15
14
I/O CLOCK
ADDRESS INPUT
DATA OUT
CS
REF+
INPUT A3
INPUT A4
INPUT A5
INPUT A6
INPUT A7
FN PACKAGE
(TOP VIEW)
INPUT A2
INPUT A1
INPUT A0
INPUT A10
REF–
SYSTEM CLOCK
INPUT A8
GND
INPUT A9
V
CC
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.