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ADE5166ASTZF62 データシート(PDF) 57 Page - Analog Devices

部品番号 ADE5166ASTZF62
部品情報  Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver
PDF  156 Pages
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
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ADE5166ASTZF62 データシート(HTML) 57 Page - Analog Devices

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ADE5166/ADE5169/ADE5566/ADE5569
Rev. B | Page 57 of 156
One LSB of the current channel rms offset is equivalent to
16,384 LSBs of the square of the current channel rms register.
Assuming that the maximum value from the current channel
rms calculation is 0d1,898,124 with full-scale ac inputs, then
1 LSB of the current channel rms offset represents 0.23% of
measurement error at −60 dB down from full scale.
768
,
32
2
×
+
=
IRMSOS
I
I
0
rms
rms
(4)
where Irms0 is the rms measurement without offset correction.
Irms(t)
0x00
+
IRMSOS[11:0]
Irms[23:0]
226
225
sgn
227
217 216
218
24
24
dt
HPF
MODE1[5]
HPF
CURRENT CHANNEL
WAVEFORM
DATA RANGE WITH
INTEGRATOR OFF
0xD70A3E
0x000000
0x28F5C2
60Hz
0xD487B0
IPA
IPB
0x2B7850
0x000000
CURRENT CHANNEL
WAVEFORM
DATA RANGE WITH
INTEGRATOR ON (60Hz)
HPF1
DIGITAL
INTEGRATOR*
LPF3
IBGAIN
*NOTE THAT THE DIGITAL INTEGRATOR IS NOT AVAILABLE IN THE ADE5166.
Figure 61. ADE5166/ADE5169 Current Channel RMS Signal Processing with PGA1 = 2, 4, 8, or 16
Irms(t)
0x00
+
IRMSOS[11:0]
Irms[23:0]
226
225
sgn
227
217 216
218
24
24
dt
MODE1[5]
CURRENT CHANNEL
WAVEFORM
DATA RANGE WITH
INTEGRATOR OFF
0xD70A3E
0x000000
0x28F5C2
60Hz
0xD487B0
0x2B7850
0x000000
CURRENT CHANNEL
WAVEFORM
DATA RANGE WITH
INTEGRATOR ON (60Hz)
HPF1
DIGITAL
INTEGRATOR*
LPF3
HPF
IP
*NOTE THAT THE DIGITAL INTEGRATOR IS NOT AVAILABLE IN THE ADE5566.
Figure 62. ADE5566/ADE5569 Current Channel RMS Signal Processing with PGA1 = 2, 4, 8, or 16



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