TLC1549C, TLC1549I, TLC1549M

10-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH SERIAL CONTROL

SLAS059C – DECEMBER 1992 – REVISED MARCH 1995

13

POST OFFICE BOX 655303

APPLICATION INFORMATION

1000000000

0111111111

0000000010

0000000001

0000000000

1111111110

0

0.0096

2.4528

2.4576

2.4624

1000000001

1111111101

1111111111

4.9056

4.9104

4.9152

512

511

2

1

0

1022

513

1021

1023

VI – Analog Input Voltage – V

VZT =VZS + 1/2 LSB

VZS

See Notes A and B

0.0048

VFT = VFS – 1/2 LSB

VFS

NOTES: 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 0.0024 V and the transition to full scale (VFT) is 4.908 V. 1 LSB = 4.8 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 12. Ideal Conversion Characteristics

Processor

Control

Circuit

To Source

Ground

5-V DC Regulated

Analog Input

ANALOG IN

I/O CLOCK

CS

DATA OUT

REF+

REF –

GND

TLC1549

Figure 13. Typical Serial Interface