TLC2543CDWR Datasheet, PDF (20/34 Pages) Texas Instruments – 12-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS

TLC2543C, TLC2543I, TLC2543M
12-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 ANALOG INPUTS
SLAS079F – DECEMBER 1993 – REVISED NOVEMBER 2001
APPLICATION INFORMATION
111111111111
See Notes A and B
VFS
111111111110
111111111101
4095
VFSnom
4094
4093
100000000001
100000000000
011111111111
VZS
VZT = VZS + 1/2 LSB
VFT = VFS – 1/2 LSB
2049
2048
2047
000000000010
2
000000000001
1
000000000000
0
0.0012 0.0024
2.4564 2.4576 2.4588
0
4.9128 4.9140 4.9152
VI – Analog Input Voltage – V
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 0.0006 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
Analog
Inputs
To Source
Ground
TLC2543
15
1 _AIN0
2 _AIN1
CS
18
I/O CLOCK
3
AIN2
DATA INPUT ¹⁷
4
AIN3
5 _AIN4
6
AIN5
7 _AIN6
16
DATA OUT
19
EOC
8 _AIN7
9
AIN8
11 _AIN9
12 _AIN10
14
REF+
REF– ¹³
GND
10
Processor
5-V DC Regulated
Figure 17. Serial Interface
Control
Circuit
20
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265