TLC540I, TLC541I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 INPUTS
SLAS065A – OCTOBER 1983 – REVISED MARCH 1995
DW OR N PACKAGE
(TOP VIEW)
8-Bit Resolution A/D Converter
Microprocessor Peripheral or Stand-Alone
Operation
INPUT A0
INPUT A1
INPUT A2
INPUT A3
INPUT A4
INPUT A5
INPUT A6
INPUT A7
INPUT A8
GND
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
On-Chip 12-Channel Analog Multiplexer
Built-in Self-Test Mode
SYSTEM CLOCK
I/O CLOCK
ADDRESS INPUT
DATA OUT
CS
REF+
REF–
INPUT A10
INPUT A9
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
FN PACKAGE
(TOP VIEW)
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
12.5 mW
3.6 µs
17 µs
40 x 10
12.5 mW
3
3
description
3
2
1
20 19
18
I/O CLOCK
INPUT A3
4
5
6
7
8
The TLC540 and TLC541 are CMOS A/D
converters built around an 8-bit switched-
capacitor
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
ADDRESS INPUT
DATA OUT
CS
INPUT A4
INPUT A5
INPUT A6
INPUT A7
17
16
15
14
successive-approximation
A/D
REF+
9 10 11 12 13
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. Detailed information on interfacing to most popular
microprocessors is readily available from the factory.
AVAILABLE OPTIONS
PACKAGE
T
A
SO PLASTIC DIP
(DW)
PLASTIC DIP
(N)
CHIP CARRIER
(FN)
—
TLC540IN
TLC541IN
TLC540IFN
TLC541IFN
–40°C to 85°C
–55°C to 125°C
TLC541IDW
—
TLC541MN
—
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