TC820CLW データシートの表示（PDF） - Microchip Technology

部品番号

コンポーネント説明

メーカー

TC820CLW

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

Microchip Technology 

TC820

FIGURE 3-7:

COMMON MODE VOLTAGE REMOVED IN BATTERY OPERATION WITH

VIN = ANALOG COMMON

Segment

Drive

LCD

Measured

System

V+

V-

GND

V+ V-

Power GND

Source

VBUF

CAZ VINT

VIN+

VIN-

TC820

Analog

Common VREF- VREF+ VDD

BP1

BP3

BP2

OSC1

VSS

OSC2

OSC3

NC

+

9V

FIGURE 3-8:

COMMON MODE VOLTAGE REDUCES AVAILABLE INTEGRATOR SWING

(VCOM ≠ VIN)

+

VIN

Input Buffer

+

RI

–

CI

–

VI

+

Integrator

–

VCM

[ VI

=

TI

RI CI

VCM – VIN

Where:

TI = Integration Time =

4000

FOSC

CI = Integration Capacitor

RI = Integration Resistor

DS21476B-page 14

© 2002 Microchip Technology Inc.

Share Link: