TC826 データシートの表示（PDF） - Microchip Technology

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TC826

Analog-to-Digital Converter with Bar Graph Display Output

Microchip Technology 

TC826

2.0 PIN DESCRIPTION

The descriptions of the pins are listed in Table 2-1.

TABLE 2-1:

Pin Number

(64-Pin PQFP)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

PIN FUNCTION TABLE

Symbol

Description

NC

ANALOG

COMMON

+IN

-IN

REF IN

CREF+

CREF-

VDD

VBUF

CAZ

VINT

VSS

OSC1

OSC2

BP

BAR 0

NC

BAR 1

BAR 2

BAR 3

BAR 4

BAR 5

BAR 6

BAR 7

BAR 8

BAR 9

BAR 10

BAR 11

BAR 12

BAR 13

BAR 14

BAR 15

BAR 16

BAR 17

BAR 18

BAR 19

BAR 20

BAR 21

BAR 22

BAR 23

Positive analog signal input.

Establishes the internal analog ground point. Analog common is set to 2.9V below the

positive supply COMMON by an internal zener reference circuit. The voltage difference

between VDD and analog common can be used to supply the TC826 voltage reference

input at REF IN (Pin 5).

Positive analog signal input.

Negative analog signal input.

Reference voltage positive input. Measured relative to analog common.

REF IN ≈ Full Scale/2.

Reference capacitor connection.

Reference capacitor connection.

Positive supply terminal.

Buffer output. Integration resistor connection.

Negative comparator input. Auto-zero capacitor connection.

Integrator output. Integration capacitor connection.

Negative supply terminal.

Oscillator resistor (ROSC) connection.

Oscillator resistor (ROSC) connection.

LCD Backplane driver.

LCD Segment driver: Bar 0.

No connection.

LCD Segment driver: Bar 1.

LCD Segment driver: Bar 2.

LCD Segment driver: Bar 3.

LCD Segment driver: Bar 4.

LCD Segment driver: Bar 5.

LCD Segment driver: Bar 6.

LCD Segment driver: Bar 7.

LCD Segment driver: Bar 8.

LCD Segment driver: Bar 9.

LCD Segment driver: Bar 10.

LCD Segment driver: Bar 11.

LCD Segment driver: Bar 12.

LCD Segment driver: Bar 13.

LCD Segment driver: Bar 14.

LCD Segment driver: Bar 15.

LCD Segment driver: Bar 16.

LCD Segment driver: Bar 17.

LCD Segment driver: Bar 18.

LCD Segment driver: Bar 19.

LCD Segment driver: Bar 20.

LCD Segment driver: Bar 21.

LCD Segment driver: Bar 22.

LCD Segment driver: Bar 23.

DS21477B-page 4

© 2002 Microchip Technology Inc.

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