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参数资料
| 型号： | TC9402EJD |
| 元件分类： | 模拟专用变换器 |
| 英文描述： | VOLTAGE-FREQUENCY CONVERTER, 0.1 MHz, CDIP14 |
| 封装： | CERDIP-14 |
| 文件页数： | 7/28页 |
| 文件大小： | 545K |
| 代理商： | TC9402EJD |
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2007 Microchip Technology Inc.
DS21483D-page 15
TC9400/9401/9402
FIGURE 6-2:
F/V Single Supply F/V Converter.
6.3
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 3 s 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 6-3 and Figure 6-4).
FIGURE 6-3:
F/V Digital Outputs.
Offset
Adjust
10 k
Ω
.01 F
6.2V
IN914
33 k
Ω
100 k
Ω
500 k
Ω
0.1 F
100 k
Ω
V+ = 10V to 15V
1
47 pF
VOUT
Frequency
Input
TC9400
6
10 k
Ω
2
11
1.0
4
14
12
3
5
GND
VREFOUT
IIN
Zero
Adjust
VREF
IBIAS
Amp Out
VDD
VSS
GND
6
7
1.0 k
Ω
V+
1.0 k
Ω
0.01 F
.001 F
DET
Note:
The output is referenced to Pin 6, which is at 6.2V (Vz). For frequency meter applications,
a 1 mA meter with a series scaling resistor can be placed across Pins 6 and 12.
M
Ω
M
Ω
0.5 ms
Min
5.0 ms
Min
Delay = 3 ms
Input
FOUT
FOUT/2
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