TLC542C, TLC542I

8-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH SERIAL CONTROL AND 11 INPUTS

SLAS075C – FEBRUARY 1989 – REVISED JUNE 2001

1

POST OFFICE BOX 655303

Operation

MC145041

With the TLC1542/3 10-Bit A/D Converters

PARAMETER

VALUE

Channel Acquisition/Sample Time

16

µs

Conversion Time (Max)

20

µs

Samples per Second (Max)

25

× 103

Power Dissipation (Max)

10 mW

description

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 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.

AVAILABLE OPTIONS

PACKAGE

TA

CHIP CARRIER

(FN)

PLASTIC DIP

(N)

SMALL OUTLINE

(DW)

0

°C to 70°C

—

TLC542CN

TLC542CDW

–40

°C to 85°C

TLC542IFN

TLC542IN

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.

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.

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

INPUT A0

INPUT A1

INPUT A2

INPUT A3

INPUT A4

INPUT A5

INPUT A6

INPUT A7

INPUT A8

GND

EOC

I/O CLOCK

ADDRESS INPUT

DATA OUT

CS

REF+

REF–

INPUT A10

INPUT A9

DW OR N PACKAGE

(TOP VIEW)

32

1 20 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

I/O CLOCK

ADDRESS INPU

DATA OUT

CS

REF+

INPUT A3

INPUT A4

INPUT A5

INPUT A6

INPUT A7

FN PACKAGE

(TOP VIEW)