TC7107 datasheet(7/26 Pages) MICROCHIP

Numer części	TC7107

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

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DS21455B-page 7

TC7106/A/TC7107/A

36

(5)

VREF+

The analog input required to generate a full scale output (1999 counts). Place 100mV

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

2V full scale. See paragraph on Reference Voltage.

37

(4)

TEST

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.

38

(3)

OSC3

See Pin 40.

39

(2)

OSC2

See Pin 40.

40

(1)

OSC1

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

section), connect Pin 40 to the junction of a 100k

Ω resistor and a 100pF capacitor.

The 100k

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

TABLE 2-1:

PIN FUNCTION TABLE (CONTINUED)

Pin Number

(40-Pin PDIP)

Normal

Pin No.

(40-Pin PDIP)

(Reversed

Symbol

Description

Podobny numer części - TC7107

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