TC14433 데이터 시트보기 (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

0.1 µF

470k 0.1 µF

+V

27k

TC04 20k

C01 C02 R1

R1/C 1C1

Vx

VAG

DS 4

DS 3

DS 2

DS 1

TC14433

Q0

Q1

VREF

Q2

Q3

VDD VSS VEE EOC DU RC RC

+V –V

300k

–V

C

R

14024B

14070B 1/4

+V

14013B 1/4 14070B

D

Q

1/2 DIGIT

CR RQ

14013B

D

Q

CR RQ

PLUS

SIGN

–V 1/4 14070B

MINUS

SIGN

+V

BI D C B A Ph LD

14543B

g f edcba

BI D C B A Ph LD

+V

14543B

–V

g f edcba

+V

BI D C B A Ph LD

+V

+V

14543B

–V

g f e d c b a –V

2

3

4

5

Figure 11. 3-1/2 Digit Voltmeter with LCD Display

EOC

1/2 CLOCK CYCLE

DS1

1/2 DIGIT

(MSD)

2 CLOCK

DS2 CYCLES

18 CLOCK CYCLES

DS3

DS4

(LSD)

Figure 12. Digit Select Timing Diagram

TELCOM SEMICONDUCTOR, INC.

≈ 16,400 CLOCK CYCLES

BETWEEN EOC PULSES

6

7

8

3-133

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