CS5467-ISZ 查看數據表（PDF） - Cirrus Logic

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CS5467-ISZ

Four-channel Power / Energy IC

Cirrus Logic 

CS5467

4.9 Peak Voltage and Current

Peak current (I1PEAK, I2PEAK) and peak voltage

(V1PEAK, V2PEAK) are the largest current and voltage

samples detected in the previous low-rate interval.

4.10 Power Offset

The power offset registers, P1OFF (P2OFF) can be used

to offset erroneous power sources resident in the sys-

tem not originating from the power line. Residual power

offsets are usually caused by crosstalk into current

paths from voltage paths or from ripple on the meter or

chip’s power supply, or from inductance from a nearby

transformer.

These offsets can be either positive or negative, indicat-

ing crosstalk coupling either in phase or out of phase

with the applied voltage input. The power offset regis-

ters can compensate for either condition.

To use this feature, measure the average power at no

load using either Single or Continuous Conversion com-

mands. Take the measured result (from the P1AVG

(P2AVG) register), invert (negate) the value and write it

to the associated power offset register, P1OFF (P2OFF).

DS714F1

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