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ATM90E32AS-AU-R Datasheet(PDF) 27 Page - ATMEL Corporation

Part # ATM90E32AS-AU-R
Description  Enhanced Poly-Phase High-Performance Wide-Span Energy Metering IC
PDF  84 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATM90E32AS-AU-R Datasheet(HTML) 27 Page - ATMEL Corporation

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M90E32AS [DATASHEET]
Atmel-46003B-SE-M90E32AS-Datasheet_02122015
3.9
EXTERNAL COMPONENT COMPENSATION
The calibrated channel gain and phase-delay offset could be tuned with respect to some reference parameter. This feature
is useful when external component is not ideal and allow low cost sensors used in the system.
There are three reference parameters:
•
Measured Current RMS (per phase)
•
Measured line frequency (all phase in common)
•
Measured temperature
There are two tuning parameters to compensate:
•
Channel gain compensation
•
Channel phase delay compensation
Following are the compensation correspondences:
•
Measured current RMS is per phase. It goes to Igain and Phi for each phase.
•
This is to compensate the non-linearity of current sensors, like a Current-Transformer. Non-linearity can be gain-non-
linearity or phase nonlinearity. The gain nonlinearity is compensated by Igain compensation and phase nonlinearity
is compensated by phase compensation.
•
Frequency compensation only goes to Phi/Delay (all phases are the same).
•
Temperature compensation only goes to UGain (per phase).
Table-4 Compensation Related Registers
Parameter
Describtion
Registers
LogIrms
Measured Current RMS
LOGIrms0, LOGIrms1
F0
Nominal line frequency
F0
T0
Nominal temperature
T0
GainIrms
Gain compensation for Irms
GainAIrms01, GainAIrms2, GainBIrms01, GainBIrms2,
GainCIrms01, GainCIrms2
PhiIrms
Phase compensation for Irms
PhiAIrms01, PhiAIrms2, PhiBIrms01, PhiBIrms2, PhiCIrms01,
PhiCIrms2
UGainT
Temperature compensation only goes to UGain
UGainTAB, UGainTC
PhiF
Frequency compensation only goes to Phi/Delay
PhiFreqComp



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