TLC2543C, TLC2543I, TLC2543M
12-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 ANALOG INPUTS
SLAS079D – DECEMBER 1993 – REVISED MAY 1997
12-Bit-Resolution A/D Converter
DB, DW, J, OR N PACKAGE
(TOP VIEW)
10-µs Conversion Time Over Operating
Temperature
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
GND
V
CC
EOC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
11 Analog Input Channels
3 Built-In Self-Test Modes
Inherent Sample-and-Hold Function
Linearity Error . . . ±1 LSB Max
On-Chip System Clock
I/O CLOCK
DATA INPUT
DATA OUT
CS
14 REF+
End-of-Conversion Output
13
12
11
REF–
AIN10
AIN9
Unipolar or Bipolar Output Operation
(Signed Binary With Respect to 1/2 the
Applied Voltage Reference)
Programmable MSB or LSB First
Programmable Power Down
Programmable Output Data Length
CMOS Technology
FK OR FN PACKAGE
(TOP VIEW)
†
Application Report Available
3
2
1
20 19
18
AIN3
AIN4
AIN5
AIN6
AIN7
I/O CLOCK
DATA INPUT
DATA OUT
CS
4
5
6
7
8
description
17
16
15
The TLC2543C and TLC2543I are 12-bit, switched-
capacitor, successive-approximation, analog-to-
digital converters. Each device has three control
inputs [chip select (CS), the input-output clock (I/O
CLOCK), and the address input (DATA INPUT)] and
is designed for communication with the serial port of
a host processor or peripheral through a serial 3-state
output. The device allows high-speed data transfers
from the host.
14 REF+
9 10 11 12 13
In addition to the high-speed converter and versatile control capability, the device has an on-chip 14-channel
multiplexer that can select any one of 11 inputs or any one of three internal self-test voltages. The
sample-and-hold function is automatic. At the end of conversion, the end-of-conversion (EOC) output goes high
to indicate that conversion is complete. The converter incorporated in the device features differential
high-impedance reference inputs that facilitate ratiometric conversion, scaling, and isolation of analog circuitry
from logic and supply noise. A switched-capacitor design allows low-error conversion over the full operating
temperature range.
The TLC2543C is characterized for operation from T = 0°C to 70°C. The TLC2543I is characterized for
A
operation from T = –40°C to 85°C. The TLC2543M is characterized for operation from T = –55°C to 125°C.
A
A
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.
†
Microcontroller Based Data Acquisition Using the TLC2543 12-bit Serial-Out ADC (SLAA012)
Copyright 1997, 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
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