TC14433 データシートの表示（PDF） - TelCom Semiconductor Inc => Microchip

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TC14433

3-1/2 DIGIT A/D CONVERTERS

TelCom Semiconductor Inc => Microchip 

3-1/2 DIGIT A/D CONVERTERS

1

TC14433

TC14433A

470k 0.1µF 0.1µF

+5V VX INPUT

27kΩ

TC04

100kΩ

R1 R1/C1 C1 C01 C02

VX

CLK1

VAG

CLK0

DU

OR

EOC

Q0

TC14433 Q1

VREF

Q2

300k

VSS

+5V

VDD

VEE

DS4 DS3 DS 2 DS1

A B1 a

B

b

C

c

D I4511B d

LT

e

LE

VSS

f

VDDg

RESISTOR

NETWORK

OR

INDIVIDUAL

RESISTOR*

R

RDP

For VREF = 2000V

V : 1.999V full scale

For VREF = 200 mV

V : 199.9 mV full scale

(change 470k to R = 27k

and decimal point position)

Peak digit current for an eight

displayed is 7 times the segment

current.

*To increase segment current

capability add two 75491 ICs

between 14511B and Resistor

Network. The use of the 1413

as digit driver increases digit

current capability over the 75492.

**V can range between –2.8 and

–11V.

RM

VEE**

+5V

(MINUS)

MINUS

CONTROL

ALTERNATE OVERRANGE CIRCUIT

WITH SEPARATED LED

1/6 75492

OR

OR

1/7 1413

RR

+5V

75492

OR

1413*

DIGIT DRIVERS

2

3

COMMON

CATHODE

LED DISPLAY

4

5

Figure 14. 3-1/2 Digit Voltmeter with Low Component Count Using Common Cathode Displays

6

7

TELCOM SEMICONDUCTOR, INC.

8

3-135

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