90E32 Datasheet, PDF (46/71 Pages) Integrated Device Technology – Poly-Phase High-Performance Wide-Span Energy Metering IC

90E32
POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
DetectThC
Phase C Current Threshold in Detection Mode
Address: 13H
Type: Read/Write
Default Value: 0000H
Bit
Name
Description
15
-
Reserved.
Channel I3 negative detector calculation code.
Code mapping:
14:8
CalCodeN 7'b000-0000, Vc=-4.28mV=-3.03mVrms (Vc is the threshold of low power computation)
7'b111-1111, Vc=12.91mV=9.14mVrms
DAC typical resolution is [12.91-(-4.28)]/127=135.4µV=95.7µVrms
7
-
Reserved.
Channel I3 positive detector calculation code.
Code mapping:
6:0
CalCodeP 7'b000-0000, Vc=-4.28mV=-3.03mVrms (Vc is the threshold of low power computation)
7'b111-1111, Vc=12.91mV=9.14mVrms
DAC typical resolution is [12.91-(-4.28)]/127=135.4µV=95.7µVrms
The calibration method is that, the user program the detection threshold and test with the standard input signal until the output trips.
6.3.2 PARTIAL MEASUREMENT MODE REGISTERS
PMOffsetA
Ioffset for phase A in Partial Measurement mode
Address: 14H
Type: Read/Write
Default Value: 0000H
Bit
Name
15-14
-
13:0
PMOffsetA
Reserved.
Phase A current offset in Partial Measurement mode.
Description
PMOffsetB
Ioffset for phase B in Partial Measurement mode
Address: 15H
Type: Read/Write
Default Value: 0000H
Bit
Name
15-14
-
13:0
PMOffsetB
Reserved.
Phase B current offset in Partial Measurement mode.
Description
PMOffsetC
Ioffset for phase C in Partial Measurement mode
Address: 16H
Type: Read/Write
Default Value: 0000H
Bit
Name
15-14
-
13:0
PMOffsetC
Reserved.
Phase C current offset in Partial Measurement mode.
Description
Register
46
December 9, 2011