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FS9721_LP1 데이터시트(PDF) 33 Page - Fortune Semiconductor Corp.

부품명 FS9721_LP1
상세설명  4,000 counts auto range DMM IC
PDF  41 Pages
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제조업체  FORTUNE [Fortune Semiconductor Corp.]
홈페이지  https://www.ic-fortune.com/eng/index.asp
Logo FORTUNE - Fortune Semiconductor Corp.

FS9721_LP1 데이터시트(HTML) 33 Page - Fortune Semiconductor Corp.

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FS9721_LP1
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Capacitance measurement is to charge/discharge to measuring capacitance through R22 to
form a oscillation, then calculate the cycle of oscillation to get the capacitance value. To adjust R22
can calibrate the value in capacitance measurement. J4 and J6 are mode switches. When doing
capacitance measurement, J4 and J6 are close.
(In actual application, if the linearity is worse when doing 5.120nF measurement, you can take a
consideration of paralleling a proximate 1000pF capacitance in input end of capacitance
measurement during design. When doing the measurement, to press REL key and make the value
be zero before measuring. The linearity of the smaller measurement in capacitance mode will be
better.)
14.18 Frequency Measurement
ADP
SGND
R18
10k
R28
1M
COM
Hz
FS9721_LP1
R30
100k
J7
J9
PTC
1k
C15
10uF
Diagram 32
Frequency Measurement
14.19
Triode hFE Testing
16.5k
220k
VDDA
E
C
B
R30
100K
ADP
Diagram 33
PNP-type Triode



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