ADE7953 datasheet(36/68 Pages) AD

部件名	ADE7953

功能描述	Single Phase, Multifunction Metering IC with Neutral Current Measurement

PDF	68 Pages

Scroll/Zoom	100%

制造商	AD [Analog Devices]

网页	http://www.analog.com

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36 / 68 page

ADE7953

Data Sheet

Rev. A | Page 36 of 68

PERIOD MEASUREMENT

The ADE7953 provides a period measurement of the voltage

channel. This measurement is provided in the 16-bit, unsigned

period register (Address 0x10E). The period register is updated

once every line period and has a settling time of 30 ms to 40 ms

associated with it before the period measurement is stable.

The period measurement has a resolution of 4.48 μs/LSB

(223 kHz clock), which represents 0.0224% when the line

frequency is 50 Hz and 0.0268% when the line frequency

is 60 Hz.

The value of the period register for a 50 Hz network is approxi-

mately 4460 in decimal (223 kHz/50 Hz) and 3716 in decimal

(223 kHz/60 Hz) for a 60 Hz network. The period register is

stable at ±1 LSB when the line is established and the measure-

ment does not change.

The following equation can be used to compute the line period

and frequency using the period register:

sec

kHz

223

]

PERIOD[

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ADE7953 数据表(PDF) 36 Page - Analog Devices