TLC542C_14 Datasheet, PDF (1/13 Pages) Texas Instruments – 8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 INPUTS

D 8-Bit Resolution A/D Converter
D Microprocessor Peripheral or Stand-Alone
Operation
D On-Chip 12-Channel Analog Multiplexer
D Built-In Self-Test Mode
D Software-Controllable Sample and Hold
D Total Unadjusted Error . . . ± 0.5 LSB Max
D Direct Replacement for Motorola
MC145041
D Onboard System Clock
D End-of-Conversion (EOC) Output
D Pinout and Control Signals Compatible
With the TLC1542/3 10-Bit A/D Converters
D CMOS Technology
TLC542C, TLC542I
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 INPUTS
SLAS075C – FEBRUARY 1989 – REVISED JUNE 2001
DW OR N PACKAGE
(TOP VIEW)
INPUT A0 ₁
INPUT A1 ₂
INPUT A2 ₃
INPUT A3 ₄
INPUT A4 ₅
INPUT A5 6
INPUT A6 7
INPUT A7 8
INPUT A8 9
GND 10
20 ^V_CC
19 ^EOC
18 ^{I/O CLOCK}
17 ^{ADDRESS INPUT}
16 ^{DATA OUT}
15 CS
14 REF+
13 REF–
12 INPUT A10
11 INPUT A9
FN PACKAGE
(TOP VIEW)
PARAMETER
VALUE
Channel Acquisition/Sample Time
16 µs
Conversion Time (Max)
20 µs
Samples per Second (Max)
Power Dissipation (Max)
25 × 103
10 mW
INPUT A3
3 2 1 20 19
4
18
I/O CLOCK
description
INPUT A4 ₅
INPUT A5 6
17 ^{ADDRESS INPU}
16 DATA OUT
The TLC542 is a CMOS converter built around an
8-bit switched-capacitor successive-approximation
analog-to-digital converter. The device is designed
INPUT A6
INPUT A7
7
15
8
14
9 10 11 12 13
CS
REF+
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 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.
The converter incorporated in the TLC542 features differential high-impedance reference inputs that facilitate
ratiometric conversion, scaling, and isolation of analog circuitry from logic and supply noises. A switched-
capacitor design allows low-error (± 0.5 LSB) conversion in 20 µs over the full operating temperature range.
The TLC542C is characterized for operation from 0°C to 70°C and the TLC542I is characterized for operation
from – 40°C to 85°C.
TA
0°C to 70°C
– 40°C to 85°C
AVAILABLE OPTIONS
PACKAGE
CHIP CARRIER
(FN)
PLASTIC DIP
(N)
—
TLC542CN
TLC542IFN
TLC542IN
SMALL OUTLINE
(DW)
TLC542CDW
TLC542IDW
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.
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  2001, Texas Instruments Incorporated
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