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TC7126ACPL Datasheet(PDF) 12 Page - TelCom Semiconductor, Inc

Part # TC7126ACPL
Description  3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS
PDF  13 Pages
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Manufacturer  TELCOM [TelCom Semiconductor, Inc]
Direct Link  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC7126ACPL Datasheet(HTML) 12 Page - TelCom Semiconductor, Inc

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3-228
TELCOM SEMICONDUCTOR, INC.
3-1/2 DIGIT
ANALOG-TO-DIGITAL CONVERTERS
TC7126
TC7126A
8
14
7
13
12
11
10
9
1
2
3
4
5
6
TC7126A
9V
VIN
9 M
Ω
900 k
Ω
90 k
Ω
10 k
Ω
2V
20V
200V
200 mV
1N4148
10 M
Ω
1 M
Ω
0.02
µF
1 M
Ω 10%
47 k
Ω
1W
10%
20 k
Ω
10%
6.8 µF
1 µF
COM
C1 = 3 pF TO 10 pF, VARIABLE
C2 = 132 pF, VARIABLE
+
+
AD636
2.2
µF
0.01
µF
10 k
Ω
240 k
Ω
SEGMENT
DRIVE
LCD
39
40
28
27
38
29
26
1
35
32
31
30
26
36
BP
V
+
V
–
V
+
REF
V
–
REF
ANALOG
COMMON
V
+
IN
V
+
OUT
V
–
C1
C2
Figure 9. Decimal Point and Annunciator Drives
Figure 11. 3-1/2 Digit True RMS AC DMM
VREF
+
VREF
–
VIN
+
VIN
–
ANALOG
COMMON
TC7126A
LCD
RSTANDARD
RUNKNOWN
V
+
TC7126A
DECIMAL
POINT
SELECT
V
+
V
+
TEST
GND
4030
TO LCD
DECIMAL
POINTS
BP
TC7126A
BP
TEST
37
21
V+
V+
GND
TO LCD
DECIMAL
POINT
TO
BACKPLANE
4049
Multiple Decimal Point or
Annunciator Driver
Simple Inverter for Fixed Decimal Point
or Display Annunciator
Figure 10. Low Parts Count Ratiometric Resistance Measurement



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