參數(shù)資料
型號(hào)： TC9402EJD
廠商： Microchip Technology
文件頁數(shù)： 16/28頁
文件大?。?/td> 545K
描述： IC V-FREQ/FREQ-V CONV 14CDIP
標(biāo)準(zhǔn)包裝： 29
類型： 電壓至頻率和頻率至電壓
頻率 - 最大： 100kHz
全量程： ±100ppm/°C
線性： ±0.25%
安裝類型： 通孔
封裝/外殼： 14-CDIP（0.300"，7.62mm）
供應(yīng)商設(shè)備封裝： 14-CERDIP
包裝： 管件
TC9400/9401/9402
DS21483D-page 16
?2007 Microchip Technology Inc.
FIGURE 6-4:    DC  10kHz Converter.
6.4  Output Filtering
The output of the TC9400 has a sawtooth ripple super-
imposed on a DC level. The ripple will be rejected if the
TC9400 output is converted to a digital value by an
integrating Analog-to-Digital Converter, such as the
TC7107. The ripple can also be reduced by increasing
the value of the integrating capacitor, although this will
reduce the response time of the F/V converter.
The sawtooth ripple on the output of an F/V can be
eliminated without affecting the F/Vs response time by
using the circuit in Figure6-1. The circuit is a
capacitance multiplier, where the output coupling
capacitor is multiplied by the AC gain of the op amp. A
moderately fast op amp, such as the TL071, should be
used.
FIGURE 6-5:    Ripple Filter.
TC9400A
TC9401A
TC9402A
+5V
14
V
DD
V+
V+
F
OUT
/2
F
OUT
Output
Common
10
9
8
5
3
12
12pF
C
REF
56pF
C
INT
1000pF
R
INT
1M?/DIV>
60pF
Amp
Out
V
OUT
V
SS
I
BIAS
1
4
10k?/DIV>
2.2k?/DIV>
100k?/DIV>
2k?/DIV>
-5V
+5V
Zero Adjust
2
7
(Typically -5V)
V
REF
F
IN
11
Threshold
Detector
3ms
Delay
*
*
*
*Optional If
 Buffer is Needed
Offset
Adjust
V
REF 
OUT
I
IN
42

+
Op
Amp
V
REF
See
Figure 7-1:
Frequency
Input Level
Shifter
6
GND
Threshold
Detect
1
47pF
V
OUT
TC9400
12
3
5
V
REF
OUT
 
I
IN
GND
AMP OUT
6
.001礔
+

1
3
2
.01礔
1M?nbsp 0.1礔
+5
7
6
4
-5
TL071
200?/DIV>
M?/DIV>
M?/DIV>
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