ADE7880ACPZ-RL(RevA) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADE7880ACPZ-RL
(Rev.:RevA)

Polyphase Multifunction Energy Metering IC with Harmonic Monitoring

Analog Devices 

ADE7880

Bits[8:6] (REVAPC, REVAPB, and REVAPA, respectively) in the

STATUS0 register are set when a sign change occurs in the

power selected by Bit 6 (REVAPSEL) in the ACCMODE

register.

Bits[2:0] (CWSIGN, BWSIGN, and AWSIGN, respectively) in

the PHSIGN register are set simultaneously with the REVAPC,

REVAPB, and REVAPA bits. They indicate the sign of the

power. When they are 0, the corresponding power is positive.

When they are 1, the corresponding power is negative.

Bit REVAPx of STATUS0 and Bit xWSIGN in the PHSIGN

register refer to the total active power of Phase x, the power type

being selected by Bit 6 (REVAPSEL) in the ACCMODE register.

Interrupts attached to Bits[8:6] (REVAPC, REVAPB, and

REVAPA, respectively) in the STATUS0 register can be enabled

by setting Bits[8:6] in the MASK0 register. If enabled, the IRQ0

pin is set low, and the status bit is set to 1 whenever a change of

sign occurs. To find the phase that triggered the interrupt, the

Data Sheet

PHSIGN register is read immediately after reading the STATUS0

register. Next, the status bit is cleared and the IRQ0 pin is returned

to high by writing to the STATUS0 register with the corresponding

bit set to 1.

Active Energy Calculation

As previously stated, power is defined as the rate of energy flow.

This relationship can be expressed mathematically as

Power = dEnergy

(24)

dt

Conversely, energy is given as the integral of power, as follows:

Energy = ∫ p (t )dt

(25)

Total and fundamental active energy accumulations are always

signed operations. Negative energy is subtracted from the active

energy contents.

HPFEN BIT

AIGAIN CONFIG3[0]

INTEN BIT

CONFIG[0]

IA

APHCAL

HPF

HPFEN BIT

AVGAIN CONFIG3[0]

VA

HPF

APGAIN AWATTOS

LPF

:

DIGITAL SIGNAL PROCESSOR

24

AWATT

INTERNAL

ACCUMULATOR

THRESHOLD

34

27 26

0

WTHR

0

Figure 74. Total Active Energy Accumulation

REVAPA BIT IN

STATUS0[31:0]

AWATTHR[31:0]

32-BIT REGISTER

Rev. A | Page 46 of 104

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