TLC1541

10-BIT ANALOG-TO-DIGITAL CONVERTER

WITH SERIAL CONTROL AND 11 INPUTS

SLAS073C – DECEMBER 1995 – REVISED AUGUST 1996

2

POST OFFICE BOX 655303

description (continued)

The converters incorporated in the TLC1541 feature differential high-impedance reference inputs that facilitate

ratiometric conversion, scaling, and analog circuitry isolation from logic and supply noises. A totally

switched-capacitor design allows low-error conversion in 21

µs over the full operating temperature range.

The TLC1541 is available in DW, FN, and N packages. The C-suffix versions are characterized for operation

from 0

°C to 70°C. The I-suffix versions are characterized for operation from –40°C to 85°C.

functional block diagram

12-Channel

Analog

Multiplexer

Sample and

Hold

10-Bit

Switched-Capacitors

Analog-to-Digital

Converter

Self-Test

Reference

Output

Data

Register

10-to-1 Data

Selector and

Driver

Control Logic

and I/O

Counters

Input

Multiplexer

Input Address

Register

2

4

4

10

10

4

REF+

REF–

DATA

OUT

ANALOG

INPUTS

ADDRESS

INPUT

I/O CLOCK

SYSTEM

CLOCK

CS

1

2

3

4

5

6

7

8

9

11

12

14

13

16

17

18

15

19

typical equivalent inputs

INPUT CIRCUIT IMPEDANCE DURING SAMPLING MODE

INPUT CIRCUIT IMPEDANCE DURING HOLD MODE

1 k

Ω TYP

Ci = 60 pF TYP

(equivalent input

capacitance)

5 M

Ω TYP

INPUT

A0 – A10

INPUT

A0 – A10