
TC7116/A/TC7117/A
FIGURE 6-5:
CIRCUIT FOR DEVELOPING UNDER RANGE AND OVER RANGE SIGNALS
FROM TC7116/TC7117A OUTPUTS
V+
40
To Logic VCC
35
TC7116
TC7116A
To Logic
GND
O/R
U/R
CD4023
or 74C10
26 V-
20
21
CD4077 O/R = Over Range
U/R = Under Range
FIGURE 6-6:
TC7117/TC7117A WITH A 1.2 EXTERNAL BANDGAP REFERENCE
(VIN- TIED TO COMMON)
40
39
38
37
36
35
34
33
32
TC7117
31
30
TC7117A 29
28
27
26
25
24
23
22
21
100kΩ Set VREF = 100mV
100pF
10kΩ
0.1pF 1kΩ
1.2V
0.47µF
0.01µF
47kΩ
10kΩ
1MΩ
V+
+
In
–
0.22µF
To Display
© 2002 Microchip Technology Inc.
DS21457B-page 15