www.ti.com

APPLICATION INFORMATION

100000000000

011111111111

000000000010

000000000001

000000000000

111111111110

0

0.0024

2.4564

2.4576

2.4588

100000000001

111111111101

111111111111

4.9128

4.9140

4.9152

2048

2047

2

1

0

4094

2049

4093

4095

VI − Analog Input Voltage − V

VZT = VZS + 1/2 LSB

VZS

See Notes A and B

0.0012

VFT = VFS − 1/2 LSB

VFS

VFSnom

Processor

Control

Circuit

Analog

Inputs

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5

AIN6

AIN7

AIN8

AIN9

AIN10

I/O CLOCK

CS

DATA INPUT

DATA OUT

EOC

REF+

REF−

GND

TLC2543

To Source

Ground

5-V DC Regulated

1

2

3

4

5

6

7

8

9

11

12

15

18

17

16

19

14

13

10

TLC2543-EP

12-BIT ANALOG-TO-DIGITAL CONVERTER

WITH SERIAL CONTROL AND 11 ANALOG INPUTS

SGLS125A – JULY 2002 – REVISED NOVEMBER 2006

A.

This curve is based on the assumption that Vref+ and Vref– have been adjusted so that the voltage at the transition

from digital 0 to 1 (VZT) is 0.0006 V and the transition to full scale (VFT) is 4.9134 V. 1 LSB = 1.2 mV.

B.

The full-scale value (VFS) is the step whose nominal midstep value has the highest absolute value. The zero-scale

value (VZS) is the step whose nominal midstep value equals zero.

Figure 16. Ideal Conversion Characteristics

Figure 17. Serial Interface

20

Submit Documentation Feedback