TC820 Просмотр технического описания (PDF) - Microchip Technology

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производитель

TC820

3-3/4 digit A/D converter with frequency counter and logic probe

Microchip Technology 

TC820

Typical Applications

Logic High

Logic Low

Triplex LCD

Over Range PKHold

Low Batt

EOC

Under Range

Over Range

Analog Input

Full Scale Select

Frequency Input

Logic Probe

Input

Low Drift Voltage

Differential

Reference

Clock

Oscillator

Annunciator Drive

Triple LCD

Drivers

3-3/4 Digit A/D

Converter

Analog GND

Auto-Ranging

Frequency

Counter

Logic Probe

Digital Ground

Peak Hold

Comparator

TC820

Low

Battery

Detect

To LCD

and Buzzer

Peak

Hold

+

9V

Decimal

Point

Drivers

Buzzer

Driver

Function

Select

Decimal

Point

Select

Volts

Frequency

Logic

Buzzer

Control

Function

Select

CREF+

VIN+

VIN-

VREF+

VREF-

Common

VDD

VSS

CREF- VBUFF

CAZ VINT OSC1 OSC2

OSC3

Logic

Low

BUZIN

÷8

÷2

Frequency Counter Input

Low To LCD

Batt

Detect

A/D Control

DEINT

Under Range

Over Range

EOC

Range

TC820

Range Frequency

Input

A/D Counter Select

SEL

B

A

Range

A/D Counter

(3999 Counts)

Comparator

A>B

Low Batt

Display

Latch

Logic

Low

Triples

Drivers

15

DGND UR OR EOC/

HOLD

PEAK

HOLD

ANNUNC VDISP SEG0 • • • BP3

Buzzer

Driver

Range/

Frequency

Frequency/

Volts

Logic

DP0/LO

DP1/HI

© 2002 Microchip Technology Inc.

DS21476B-page 3

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