|
TLC5540 Datasheet, PDF (14/18 Pages) Texas Instruments – 8-BIT HIGH-SPEED ANALOG-TO-DIGITAL CONVERTER | |||
|
◁ |
TLC5540
SLAS105D â JANUARY 1995 â REVISED APRIL 2004
PRINCIPLES OF OPERATION
VDDA
18
5 V (Analog)
0.1 µF
REFTS 16
17
REFT
REFB 23
22
REFBS
AGND
21
TLC5540
R1
320 ⦠NOM
2.28 V dc
Rref
270 ⦠NOM
0 V dc
R2
80 ⦠NOM
www.ti.com
Figure 15. External Connections Using the Internal Bias Two Option
functional operation
Table 2 shows the TLC5540 functions.
INPUT SIGNAL
VOLTAGE
Vref(T)
â¢
â¢
â¢
â¢
â¢
â¢
Vref(B)
Table 2. Functional Operation
STEP
MSB
255
1
1
â¢
â¢
â¢
â¢
â¢
â¢
128
1
0
127
0
1
â¢
â¢
â¢
â¢
â¢
â¢
0
0
0
DIGITAL OUTPUT CODE
1
1
1
1
â¢
â¢
â¢
â¢
â¢
â¢
â¢
â¢
0
0
0
0
1
1
1
1
â¢
â¢
â¢
â¢
â¢
â¢
â¢
â¢
0
0
0
0
LSB
1
1
â¢
â¢
â¢
â¢
0
0
1
1
â¢
â¢
â¢
â¢
0
0
14
|
▷ |