TC9400 Ver la hoja de datos (PDF) - Microchip Technology

Número de pieza

componentes Descripción

Fabricante

TC9400

Voltage-to-Frequency/Frequency-to-Voltage Converters

Microchip Technology 

TC9400/9401/9402

FIGURE 5-2:

VOLTAGE TO FREQUENCY

R1

910k

R2

910k

Input

Voltage

(0 to 10V)

R4

100k

R3

Gain

1µF

D2

5.1VZ

100k

R5

91k

D1

5.1VZ

Rp

Offset

20k

Analog Ground

+12 to +15V

1.2k

14

VDD

CINT

11 Threshold

Detect

12 Amp Out

CREF 5 CREF

TC9400

3 IIN

2 Zero Adjust

FOUT 8

6 GND

FOUT/2 10

0.1µ

100k

7 VREF

1 IBIAS

Output 9

Common

VSS

4

Component Selection

F/S FREQ. CREF

CINT

1kHz

2200pF 4700pF

10kHz

180pF 470pF

100kHz

27pF 75pF

10k 10k

Output

Frequency

Digital

Ground

FIGURE 5-3:

FIXED VOLTAGE - SINGLE SUPPLY OPERATION

V+ = 8V to 15V (Fixed)

0.9

R1

Gain

Adjust

Offset

Adjust

VIN

0V–10V

RIN

1MΩ

R2

5V

V2

2

6

14

8

8.2

kΩ

0.01

µF

TC9400

2

kΩ

0.2

R1

820

pF

7

0.01 11

VREF

µF

12

5

180

pF 3 IIN

IIN

1

4

100kΩ

10

9

10kΩ

FOUT

10kΩ

FOUT/2

V+ R1 R2

10V 1MΩ 10kΩ

12V 1.4MΩ 14kΩ

15V 2MΩ 20kΩ

1

FOUT = IIN (V2 – V7) (CREF)

IIN

= (VIN – V2)

RIN

+

(V+ – V2)

(0.9R1 + 0.2R1)

© 2002 Microchip Technology Inc.

DS21483B-page 11

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