TC7116 Microchip, TC7116 Datasheet - Page 15

• Manufacturer Part Number: TC7116
• Description: 3-1/2 Digit Analog-to-Digital Converters with Hold
• Manufacturer: Microchip

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