ADE7953 datasheet(46/68 Pages) AD

46 / 68 page

ADE7953

Data Sheet

Rev. A | Page 46 of 68

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-bit/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).

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 数据表(PDF) 46 Page - Analog Devices