TC7107ACKW View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC7107ACKW

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

Microchip Technology 

TC7106/A/TC7107/A

TABLE 2-1: PIN FUNCTION TABLE (CONTINUED)

Pin Number

Pin No.

(40-Pin PDIP) (40-Pin PDIP)

Normal

(Reversed

36

(5)

37

(4)

38

(3)

39

(2)

40

(1)

Symbol

VREF+

TEST

OSC3

OSC2

OSC1

Description

The analog input required to generate a full scale output (1999 counts). Place

100 mV between Pins 35 and 36 for 199.9 mV full scale. Place 1V between Pins 35

and 36 for 2V full scale. See paragraph on Reference Voltage.

Lamp test. When pulled HIGH (to V+) all segments will be turned on and the display

should read -1888. It may also be used as a negative supply for externally generated

decimal points. See paragraph under TEST for additional information.

See Pin 40.

See Pin 40.

Pins 40, 39, 38 make up the oscillator section. For a 48 kHz clock (3 readings per

section), connect Pin 40 to the junction of a 100 kΩ resistor and a 100 pF capacitor.

The 100 kΩ resistor is tied to Pin 39 and the 100 pF capacitor is tied to Pin 38.

© 2008 Microchip Technology Inc.

DS21455D-page 7

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