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ES51966 데이터시트(PDF) 11 Page - Cyrustek corporation

부품명 ES51966
상세설명  4 3/4 and 5 3/4 A/D (Peak &Cap)
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제조업체  CYRUSTEK [Cyrustek corporation]
홈페이지  http://www.cyrustek.com.tw
Logo CYRUSTEK - Cyrustek corporation

ES51966 데이터시트(HTML) 11 Page - Cyrustek corporation

Back Button ES51966 Datasheet HTML 7Page - Cyrustek corporation ES51966 Datasheet HTML 8Page - Cyrustek corporation ES51966 Datasheet HTML 9Page - Cyrustek corporation ES51966 Datasheet HTML 10Page - Cyrustek corporation ES51966 Datasheet HTML 11Page - Cyrustek corporation ES51966 Datasheet HTML 12Page - Cyrustek corporation ES51966 Datasheet HTML 13Page - Cyrustek corporation ES51966 Datasheet HTML 14Page - Cyrustek corporation ES51966 Datasheet HTML 15Page - Cyrustek corporation Next Button
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06/04/25
11
ES51966
4 3/4 and 5 3/4 A/D (Peak &Cap)
integration (ZI) phase to achieve accurate measurement. In AZ phase, the system offset is
stored. The offset error will be eliminated in DINT phase. Thus a higher accuracy could
be obtained. In ZI phase, the internal status will be recovered quickly to that of zero input.
Thus the succeeding measurements won’t be disturbed by current measurement
especially in case of overload.
input
signal
reference
voltage
Buf
Raz
Cint
integrator
output
integration
time
input signal > 0
Fixed
integration
time
Variable
deintegration
time
integration
time
input signal < 0
Fixed
integration
time
Variable
deintegration
time
fixed slope
fixed slope
different
input
different
input
Figure 2.1 the structure of dual-slope integrator and its output waveform.
As mentioned above, the measurement cycle of ES51966 contains four phases:
(1) auto zero phase (AZ)
(2) input signal integration phase (INT)
(3) reference voltage integration phase (DINT)
(4) zero integration phase (ZI)
Normally, the time ratios of these four phases, AZ, INT, DINT and ZI to the entire
measurement cycle are 20%, 20%, 44% and 16% respectively. However the actual
duration of each phase depends on conversion rate. The time of each conversion rate are
shown in the table below in which voltage/current (without PEAK HOLD or frequency),
and diode measurement use this conversion time.
C[0:1]
CR (times/sec)
ZI (ms)
AZ (ms)
INT (ms)
DINT (ms)
01
00
10
11
20
10
5
2
8
16
32
80
10
20
40
100
10
20
40
100
22
44
88
220
Note: Vref = -200 mV.


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