TC9400CPD datasheet(13/20 Pages) MICROCHIP

13 / 20 page

DS21483B-page 13

TC9400/9401/9402

FIGURE 7-2:

F/V SINGLE SUPPLY F/V CONVERTER

7.3

Input Buffer

FOUT and FOUT/2 are not used in the F/V mode. How-

ever, these outputs may be useful for some applica-

tions, such as a buffer to feed additional circuitry. Then,

FOUT will follow the input frequency waveform, except

that FOUT will go high 3µsec after FIN goes high;

FOUT/2 will be square wave with a frequency of

one-half FOUT.

If these outputs are not used, Pins 8, 9 and 10 should be

connected to ground (see Figure 7-3 and Figure 7-4).

FIGURE 7-3:

F/V DIGITAL OUTPUTS

Offset

Adjust

10k

.01

µF

6.2V

IN914

33k

100k

500k

0.1

µF

100k

V+ = 10V to 15V

47pF

VOUT

Frequency

Input

TC9400

10k

1.0M

GND

VREF OUT

IIN

Zero

Adjust

VREF

IBIAS

Amp Out

VDD

VSS

GND

1.0k

V+

1.0k

0.01

µF

.001

µF

DET

Note: The output is referenced to Pin 6, which is at 6.2V (Vz). For frequency meter applications,

a 1mA meter with a series scaling resistor can be placed across Pins 6 and 12.

0.5

µsec

Min

5.0

µsec

Min

Delay = 3

µsec

Input

FOUT

FOUT/2

TC9400CPD 数据表(PDF) 13 Page - Microchip Technology

TC9400CPD 数据表(HTML) 13 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

数据表下载

链接网址

TC9400CPD 数据表(PDF) 13 Page - Microchip Technology

TC9400CPD 数据表(HTML) 13 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

数据表 下载

链接网址

数据表下载