3-1/2 DIGIT A/D CONVERTERS
TC7106
TC7106A
TC7107
1
2
3
4
5
6
7
8
TC7107A
+
V
1
40
TO PIN 1
SET V
REF
= 1V
40
39
38
37
36
35
34
33
32
31
30
TO
100k
Ω
LOGIC
V
TO
CC
LOGIC
GND
100pF
Ω
24k
+
V
25k
Ω
TC7106A
0.1µF
1M
Ω
+
IN
0.01µF
TC7106A
TC7107A
–
V
0.047µF
–
O/R
29
28
27
26
25
24
23
22
21
Ω
470k
0.22µF
–
U/R
V
20
21
CD4023
OR 74C10
TO DISPLAY
CD4077
O/R = OVERRANGE
U/R = UNDERRANGE
Figure 24. Circuit for Developing Underrange and Overrange
Signals from TC7106A Outputs.
Figure 25. TC7106A/TC7107A: Recommended Component
Values for 2.00V Full-Scale
TO PIN 1
TO PIN 1
40
40
100k
100kΩ
Ω
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
39
38
37
36
35
34
33
32
SET V
= 100mV
SET V = 100mV
REF
REF
100pF
100pF
Ω
Ω
10k
10k
10k
Ω
10k
Ω
+
+
V
V
1k
1 k
Ω
Ω
TC04
TC04
0.1µF
0.1µF
+
–
+
1.2V
0.01µF
1.2V
0.01µF
IN
IN
31
30
29
28
27
26
25
24
23
22
21
1MΩ
1MΩ
TC7107A
TC7107A
0.47µF
0.47µF
–
47kΩ
47kΩ
0.22µF
0.22µF
–
V
TO DISPLAY
TO DISPLAY
Figure 26. TC7107A With a 1.2V External Band-Gap Reference.
(VI–N Tied to Common.)
Figure 27. TC7107A Operated from Single +5V Supply. An
External Reference Must Be Used in This Application.
TELCOM SEMICONDUCTOR, INC.
3-201
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
