Datasheet

TLC1549C, TLC1549I, TLC1549M
10-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL
SLAS059C – DECEMBER 1992 – REVISED MARCH 1995
13
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
1000000000
0111111111
0000000010
0000000001
0000000000
1111111110
0 0.0096 2.4528 2.4576 2.4624
Digital Output Code
1000000001
1111111101
1111111111
4.9056 4.9104 4.9152
512
511
2
1
0
1022
Step
513
1021
1023
0.0024
V
I
– Analog Input Voltage – V
V
ZT
=V
ZS
+ 1/2 LSB
V
ZS
See Notes A and B
4.9080
0.0048
V
FT
= V
FS
– 1/2 LSB
V
FS
NOTES: A. This curve is based on the assumption that V
ref+
and V
ref–
have been adjusted so that the voltage at the transition from digital 0
to 1 (V
ZT
) is 0.0024 V and the transition to full scale (V
FT
) is 4.908 V. 1 LSB = 4.8 mV.
B. The full-scale value (V
FS
) is the step whose nominal midstep value has the highest absolute value. The zero-scale value (V
ZS
) 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