ade7953 Analog Devices, Inc., ade7953 Datasheet - Page 45

• Manufacturer Part Number: ade7953
• Description: Single Phase, Multifunction Metering Ic With Neutral Current Measurement Ade7953
• Manufacturer: Analog Devices, Inc.

PEAK DETECTION
The ADE7953 includes a peak detection feature on both
Current Channel A (phase) and Current Channel B (neutral)
and on the voltage channel. This feature continuously records
the maximum value of the voltage and current waveforms.
Peak detection can be used with overvoltage and overcurrent
detection to provide a complete swell detection function (see
the Overcurrent and Overvoltage Detection section).
Peak detection is an instantaneous measurement taken from
the absolute value of the current and voltage ADC output
waveforms and stored in three 24-/32-bit registers. The three
registers that record the peak values on Current Channel A,
Current Channel B, and the voltage channel, respectively, are
IAPEAK (Address 0x228 and Address 0x328), IBPEAK
(Address 0x22A and Address 0x32A), and VPEAK (Address
0x226 and Address 0x326).
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These three registers are updated every time that the absolute
value of the waveform exceeds the current value stored in the
IAPEAK, IBPEAK, and VPEAK registers. No time period is
associated with this measurement.
Three additional registers contain the same peak information,
but cause the corresponding peak measurements to be reset
after they are read. The three read-with-reset peak registers are
RSTIAPEAK (Address 0x229 and Address 0x329), RSTIBPEAK
(Address 0x22B and Address 0x32B), and RSTVPEAK (Address
0x227 and Address 0x327). Reading these registers clears the
contents of the corresponding xPEAK register.
ADE7953