TC7116CPL View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC7116CPL

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

Microchip Technology 

TC7116/A/TC7117/A

2.0 PIN DESCRIPTIONS

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

TABLE 2-1: PIN FUNCTION TABLE

Pin Number

(40-Pin PDIP)

(40-Pin CERDIP)

Pin Number

(44-Pin PQFP)

Symbol

Description

1

8

HLDR Hold pin, Logic 1 holds present display reading.

2

9

D1

Activates the D section of the units display.

3

10

C1

Activates the C section of the units display.

4

11

B1

Activates the B section of the units display.

5

12

A1

Activates the A section of the units display.

6

13

F1

Activates the F section of the units display.

7

14

G1

Activates the G section of the units display.

8

15

E1

Activates the E section of the units display.

9

16

D2

Activates the D section of the tens display.

10

17

C2

Activates the C section of the tens display.

11

18

B2

Activates the B section of the tens display.

12

19

A2

Activates the A section of the tens display.

13

20

F2

Activates the F section of the tens display.

14

21

E2

Activates the E section of the tens display.

15

22

D3

Activates the D section of the hundreds display.

16

23

B3

Activates the B section of the hundreds display.

17

24

F3

Activates the F section of the hundreds display.

18

25

E3

Activates the E section of the hundreds display.

19

26

AB4 Activates both halves of the 1 in the thousands display.

20

27

POL Activates the negative polarity display.

21

28

BP/ LCD backplane drive output (TC7116/TC7116A). Digital ground

GND (TC7117/TC7117A).

22

29

G3

Activates the G section of the hundreds display.

23

30

A3

Activates the A section of the hundreds display.

24

31

C3

Activates the C section of the hundreds display.

25

32

G2

Activates the G section of the tens display.

26

34

V-

Negative power supply voltage.

27

35

VINT Integrator output. Connection point for integration capacitor.

See Section 4.3 “Integrating Capacitor”, Integrating Capacitor for more

details.

28

36

VBUFF Integration resistor connection. Use a 47k resistor for a 200mV full scale range

and a 470k resistor for 2V full scale range.

29

37

CAZ The size of the auto-zero capacitor influences system noise. Use a 0.47F

capacitor for 200mV full scale, and a 0.047F capacitor for 2V full scale.

See Section 4.1 “Auto-Zero Capacitor”, Auto-Zero Capacitor for more details.

30

38

VIN- The analog LOW input is connected to this pin.

31

39

VIN+ The analog HIGH input signal is connected to this pin.

32

40

COMMON This pin is primarily used to set the Analog Common mode voltage for battery

operation, or in systems where the input signal is referenced to the power sup-

ply. It also acts as a reference voltage source. See Section 3.1.6 “Analog Com-

mon”, Analog Common for more details.

33

41

CREF- See Pin 34.

DS21457D-page 6

 2002-2012 Microchip Technology Inc.

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