TC7116
TC7116A
TC7117
TC7117A
TYPICAL APPLICATIONS
3-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTERS WITH HOLD
40
39
38
37
36
35
34
33
32
31
TC7116
TC7116A 30
29
28
27
26
25
24
23
22
21
SET VREF = 100 mV
100 kΩ
100 pF
22 kΩ
0.1 pF
1 kΩ
1 M
Ω
+
IN
+
47 k
Ω
–
U/R
V+
40
TO
LOGIC
VCC
35
TO
LOGIC
GND
0.01 µF
0.47 µF
–
TC7116
TC7116A
9V
O/R
26
V–
0.22 µF
20
21
TO DISPLAY
TO BACKPLANE
CD4023
OR 74C10
CD4077
O/R = OVERRANGE
U/R = UNDERRANGE
Figure 11. TC7116/TC7116A Using the Internal Reference
(200 mV Full Scale, 3 Readings Per Second (RPS)
Figure 13. Circuit for Developing Underrange and Overrange
Signals from TC7116/TC7116A Outputs
40
39
38
37
36
35
34
33
32
31
TC7117
30
TC7117A
29
28
27
26
25
24
23
22
21
SET VREF = 100 mV
100 kΩ
100 pF
22 kΩ
40
39
38
37
36
35
34
33
32
31
TC7117
30
TC7117A
29
28
27
26
25
24
23
22
21
100 k
Ω
100 pF
10 k
Ω
0.1 pF
1 kΩ
1.2V
SET VREF = 100 mV
+5V
0.1 pF
1 kΩ
1 M
Ω
10 kΩ
+
IN
–
+
V
TC9491CZM
+
IN
–
0.01 µF
0.47 µF
47 k
Ω
0.01 µF
0.47 µF
47 k
Ω
1 M
Ω
0.22 µF
0.22 µF
–5V
V
–
TO DISPLAY
TO DISPLAY
Figure 12. TC7117/TC7117A Internal Reference (200 mV Full Scale,
–
3 RPS, V
IN
Tied to GND for Single-Ended Inputs.)
Figure 14. TC7117/TC7117A With a 1.2V External Band-Gap
–
Reference (V
IN
Tied to Common)
3-214
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
