TC7129 Просмотр технического описания (PDF) - Microchip Technology

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производитель

TC7129

4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers

Microchip Technology 

TC7129

Low Battery

Continuity

TC7129

OSC1

OSC2

OSC3

Segment Drives

Backplane

Drives

Annunciator

Drive

Latch, Decode Display Multiplexer

VDISP

Up/Down Results Counter

Sequence Counter/Decoder

Control Logic

RANGE

L/H

CONT

V+

V–

DGND

Analog Section

DP1

DP2

UR/DP3

OR/DP4

REF HI

REF LO

INT OUT

INT IN

Figure 4-11:

COMMON

IN IN

HI LO

TC7129 Functional Block Diagram.

CREF

REF HI

REF LO

RINT

BUFF

CINT

IN HI

DE

INT1

DE-

DE

DE+

–

+ Buffer

Common

DE+

DE–

ZI, X10

IN LO

INT1, INT2

Continuity

–V+

200 mV

INT

REST

–

500 kΩ

+ Continuity

Comparator

Figure 4-12:

Integrator Block Diagram.

Integrator

10

–

pF

+

100 pF

X10

Comparator 1

+

–

TC7129

To Display Driver

To Digital

Section

Comparator 2

DS21459D-page 14

© 2006 Microchip Technology Inc.

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