TC7126RCPL View Datasheet(PDF) - Microchip Technology

Part Name

Description

MFG CO.

TC7126RCPL

3-1/2 Digit Analog-to-Digital Converters

Microchip Technology 

The display will over range for RUNKNOWN ≥ 2 x

RSTANDARD (see Figure 8-2).

TC7126/A

RSTANDARD

RUNKNOWN

VREF+ V+

VREF-

VIN+

TC7126A

LCD

VIN-

ANALOG

COMMON

FIGURE 8-2:

Low Parts Count

Ratiometric Resistance Measurement

VIN

9MΩ

900kΩ

90kΩ

200mV 1N4148

C1

0.02μF

2V

C2

47kΩ

1Ω

20V

10%

200V

1MΩ

+

1μF

1

2

10MΩ

3

4

6.8μF

5

+

6

7

20kΩ

10%

10kΩ

C1 = 3pF to 10pF, Variable

C2 = 132pF, Variable

COM

AD636

9V

26

14

1 V+ V-

27

13

240kΩ

12

TC7126A 29

11

10kΩ

10

36 VREF+

35 VREF-

28

9

8

2.2

μF

1MΩ 10%

32 ANALOG

31 COMMON

0.01 V IN+

μF 30

VOUT+

40

38

26

39

V-

BP

Segment

Drive

LCD

FIGURE 8-3:

3-1/2 Digit True RMS AC DMM

© 2006 Microchip Technology Inc.

DS21458C-page 17

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