ADE7878 datasheet(3/92 Pages) AD

3 / 92 page

ADE7878

Rev. 0 | Page 3 of 92

Apparent Power Calculation Using VNOM........................53

Apparent Energy Calculation................................................53

Integration Time Under Steady Load...................................54

Energy Accumulation Mode..................................................54

Line Cycle Apparent Energy Accumulation Mode.............54

Waveform Sampling Mode ........................................................55

Energy-to-Frequency Conversion ............................................55

Synchronizing Energy Registers with CFx Outputs...........57

CF Outputs for Various Accumulation Modes ...................57

Sign of Sum-of-Phase Powers in the CFx Datapath...........59

No Load Condition.....................................................................59

No Load Detection Based On Total Active, Reactive Powers

...................................................................................................59

No Load Detection Based on Fundamental Active and

Reactive Powers.......................................................................60

No Load Detection Based on Apparent Power ...................60

Checksum Register .....................................................................60

Interrupts .....................................................................................62

Using the Interrupts with an MCU ......................................62

Serial Interfaces ...........................................................................63

Serial Interface Choice ...........................................................63

I2C-Compatible Interface.......................................................63

SPI-Compatible Interface ......................................................65

HSDC Interface.......................................................................65

ADE7878 Evaluation Board ......................................................69

Die Version ..................................................................................69

Registers List ....................................................................................70

Outline Dimensions........................................................................90

Ordering Guide ...........................................................................90

REVISION HISTORY

2/10—Revision 0: Initial Version

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