3-173

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

TC826

A/D CONVERTER WITH

BAR GRAPH DISPLAY OUTPUT

PIN DESCRIPTION

Pin No.

(64-Plastic

Quad Flat

Package)

Symbol

Description

1NC

2

ANALOG

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

COMMON

used to supply the TC826 voltage reference input at REF IN (Pin 5).

3

+IN

Positive analog signal input.

4

-IN

Negative analog signal input.

5

REF IN

Reference voltage positive input. Measured relative ato analog-common. REF IN

≈ Full-Scale/2.

6

Reference capacitor connection.

7

Reference capacitor connection.

Positive supply terminal.

Buffer output. Integration resistor connection.

10

Negative comparator input. Auto-zero capacitor connection.

11

Integrator output. Integration capacitor connection.

12

Negative supply terminal.

13

OSC1

Oscillator resistor (ROSC) connection.

14

OSC2

Oscillator resistor (ROSC) connection.

15

BP

LCD Backplane driver.

16

BAR 0

LCD Segment driver:

Bar 0

17

NC

18

BAR 1

LCD Segment driver:

Bar 1

19

BAR 2

LCD Segment driver:

Bar 2

20

BAR 3

LCD Segment driver:

Bar 3

21

BAR 4

LCD Segment driver:

Bar 4

22

BAR 5

LCD Segment driver:

Bar 5

23

BAR 6

LCD Segment driver:

Bar 6

24

BAR 7

LCD Segment driver:

Bar 7

25

BAR 8

LCD Segment driver:

Bar 8

26

BAR 9

LCD Segment driver:

Bar 9

27

BAR 10

LCD Segment driver:

Bar 10

28

BAR 11

LCD Segment driver:

Bar 11

29

BAR 12

LCD Segment driver:

Bar 12

30

BAR 13

LCD Segment driver:

Bar 13

31

BAR 14

LCD Segment driver:

Bar 14

32

BAR 15

LCD Segment driver:

Bar 15

33

BAR 16

LCD Segment driver:

Bar 16

34

BAR 17

LCD Segment driver:

Bar 17

35

BAR 18

LCD Segment driver:

Bar 18

36

BAR 19

LCD Segment driver:

Bar 19

37

BAR 20

LCD Segment driver:

Bar 20

38

BAR 21

LCD Segment driver:

Bar 21

39

BAR 22

LCD Segment driver:

Bar 22

40

BAR 23

LCD Segment driver:

Bar 23