Datasheet

Data Sheet ADE7880
Rev. A | Page 3 of 104
FUNCTIONAL BLOCK DIAGRAM
PGA1
PGA1
PGA1
PGA3
PGA3
PGA3
AVGAINAPHCAL
HPF
NIGAIN
HPFEN OF
CONFIG3
DIGITAL
INTEGRATOR
HPF
AIGAIN
HPF
POR LDO LDO
X
2
AIRMS
LPF
X
2
X
2
AVRMS
LPF
LPF
APGAIN
LPF
NIRMS
NIRMSOS
APGAIN AFVAROS
APGAIN AFWATTOS
APGAIN AWATTOS
AVRMSOS
2
7
AIRMSOS
2
7
DFC
CF1DEN
:
DFC
CF2DEN
:
DFC
CF3DEN
:
52426 25174
7
8
9
22
12
13
14
19
18
39
37
38
36
32
29
35
34
33
3
2
27
28
23
6
RESET
REF
IN/OUT
VDD AGND AVDD DVDD DGND
CLKIN
CLKOUT
IAP
IAN
VAP
IBP
IBN
VBP
ICP
ICN
VCP
VN
PM0
PM1
CF1
CF2/HREADY
CF3/HSCLK
IRQ0
IRQ1
SCLK/SCL
MOSI/SDA
MISO/HSD
SS/HSA
HSDC
I
2
C
SPI/I
2
C
ADE7880
ADC
ADC
ADC
ADC
ADC
ADC
PGA2
15
16
INP
INN
ADC
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)
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
DIGITAL SIGNAL
PROCESSOR
COMPUTATIONAL
BLOCK FOR
HARMONIC
INFORMATION ON
PHASE A CURRENT
AND VOLTAGE
COMPUTATIONAL
BLOCK FOR
FUNDAMENTAL
ACTIVE AND
REACTIVE POWER
PHASE A,
PHASE B,
AND
PHASE C
DATA
HPFEN OF
CONFIG3
HPFEN OF
CONFIG3
DIGITAL
INTEGRATOR
1.2V
REF
10193-001
Figure 1. ADE7880 Functional Block Diagram