TC7106 Datasheet, PDF (17/19 Pages) TelCom Semiconductor, Inc – 3-1/2 DIGIT A/D CONVERTERS

3-1/2 DIGIT A/D CONVERTERS
1 ^TC7106
TC7106A
TC7107
TC7107A
VIN
9MΩ
900kΩ
90kΩ
IN4148
200mV
2V
0.02
µF
20 V
200 V
47kΩ
1W
10%
+
1µF _–
10kΩ
1
1MΩ
2
1MΩ
3
4
–
6.8µF ₊
5
6
10kΩ
7
COM
20kW
10%
C1 = 3–10pF VARIABLE,
C2 = 132pF VARIABLE
AD636
+ 9V
26
14
1 _V+
V–
27
13
24kΩ
12
TC7106A
29
11
1kΩ
36 _V+REF
10
35 _V–REF
28
9
32 _ANALOG
8
1MΩ 10%
31
COMMON
V+IN
40
0.01
2.2µF
µF
30 _V–IN
38
26 _V–
39
SEG
BP
DRIVE
Figure 18. 3 1/2 Digit True RMS AC DMM
LCD DISPLAY
2
3
4
+ 9V
160kΩ
1N4148
SENSOR
R2
50kΩ
300kΩ
R1
50kΩ
300kΩ
V+
V–
VI–N
VI+N _TC7106A
VFS = 2V
VR+ _EF
VR– _EF
COMMON
+ 9V
5.6kΩ
160kΩ
1N914 ^R1
20kΩ
0.7%/°C
PTC
R3
R2
20kΩ
V+
V–
VI–N
VI+N ^TC7106A
VR+ _EF
VR– _EF
COMMON
5
6
Figure 19. Temperature Sensor
Figure 20. Positive Temperature Coefficient Resistor
Temperature Sensor
7
TELCOM SEMICONDUCTOR, INC.
8
3-199