Data Sheet
FUNCTIONAL BLOCK DIAGRAM
ADE7880
RESET
4
REF IN/OUT
17
VDD
26
AGND
25
AVDD
24
DVDD
5
DGND
6
AIRMSOS
POR
LDO
LDO
2 7
ADE7880
CLKIN 27
X 2
LPF
AIRMS
APGAIN
2
PM0
CLKOUT 28
1.2V
REF
3
PM1
AIGAIN
HPFEN OF
CONFIG3
DIGITAL
INTEGRATOR
X 2
LPF
AVRMS
IAP 7
2 7
CF1DEN
IAN 8
PGA1
ADC
APHCAL
AVGAIN
HPF
HPFEN OF
CONFIG3
AVRMSOS
APGAIN
AWATTOS
DFC
:
CF2DEN
33 CF1
VAP 23
IBP 9
IBN 12
VBP 22
PGA1
PGA3
PGA3
ADC
ADC
ADC
HPF
TOTAL/FUNDAMENTAL ACTIVE ENERGIES
FUNDAMENTAL REACTIVE ENERGY
APPARENT ENERGY
VOLTAGE CURRENT RMS
HARMONIC INFORMATION CALCULATION
FOR PHASE B
(SEE PHASE A FOR DETAILED DATA PATH)
LPF
COMPUTATIONAL
BLOCK FOR
FUNDAMENTAL
ACTIVE AND
REACTIVE POWER
APGAIN
APGAIN
AFWATTOS
AFVAROS
PHASE A,
PHASE B,
AND
PHASE C
DATA
DFC
DFC
:
CF3DEN
:
34 CF2/HREADY
35 CF3/HSCLK
ICP 13
ICN 14
VCP 19
VN 18
PGA1
PGA3
ADC
ADC
TOTAL/FUNDAMENTAL ACTIVE ENERGIES
FUNDAMENTAL REACTIVE ENERGY
APPARENT ENERGY
VOLTAGE/CURRENT RMS
HARMONIC INFORMATION CALCULATION
FOR PHASE C
(SEE PHASE A FOR DETAILED DATA PATH)
COMPUTATIONAL BLOCK FOR HARMONIC
INFORMATION ON NEUTRAL CURRENT
HPFEN OF
DIGITAL
CONFIG3
INTEGRATOR
NIGAIN
COMPUTATIONAL
BLOCK FOR
HARMONIC
INFORMATION ON
PHASE A CURRENT
AND VOLTAGE
NIRMSOS
SPI/I 2 C
I 2 C
HSDC
29 IRQ0
32 IRQ1
36 SCLK/SCL
38 MOSI/SDA
37 MISO/HSD
39 SS/HSA
INP 15
INN 16
PGA2
ADC
HPF
X 2
LPF
NIRMS
DIGITAL SIGNAL
PROCESSOR
Figure 1. ADE7880 Functional Block Diagram
Rev. A | Page 3 of 104
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