TC9400_06 MICROCHIP [Microchip Technology], TC9400_06 Datasheet - Page 16

• Manufacturer Part Number: TC9400_06
• Description: Voltage-to-Frequency/Frequency-to-Voltage Converters
• Manufacturer: MICROCHIP [Microchip Technology]

TC9400/9401/9402
FIGURE 7-2:
7.3
F
ever, these outputs may be useful for some applica-
tions, such as a buffer to feed additional circuitry. Then,
F
that F
F
one-half F
If these outputs are not used, Pins 8, 9 and 10 should be
connected to ground (see Figure 7-3 and Figure 7-4).
DS21483C-page 16
OUT
OUT
OUT
/2 will be square wave with a frequency of
and F
will follow the input frequency waveform, except
OUT
Input Buffer
OUT
Frequency
will go high 3μsec after F
OUT
.
Input
/2 are not used in the F/V mode. How-
100k
Note: The output is referenced to Pin 6, which is at 6.2V (Vz). For frequency meter applications,
F/V Single Supply F/V Converter
Offset
Adjust
a 1mA meter with a series scaling resistor can be placed across Pins 6 and 12.
33k
10k
6.2V
0.01 μF
500k
IN
goes high;
.01 μF
0.1 μF
IN914
V+
10k
1.0k
1.0k
1.0M
11
6
2
FIGURE 7-3:
0.5msec
Zero
Adjust
I
GND
DET
BIAS
V+ = 10V to 15V
Min
F
100k
TC9400
F
Input
OUT
OUT
V
V
/2
REF
DD
V
14
7
REF
Amp Out
V
SS
4
OUT
GND
I
IN
Delay = 3msec
F/V Digital Outputs
5
3
12
6
© 2006 Microchip Technology Inc.
5.0msec
1M
47 pF
Min
.001 μF
V
OUT