Datasheet

ADE7854/ADE7858/ADE7868/ADE7878 Data Sheet
Rev. G | Page 8 of 100
PGA1
PGA1 PGA1
PGA3 PGA3 PGA3
1.2V
REF
TOTAL/FUNDAMENTAL ACTIVE/
REACTIVE ENERGIES, APPARENT
ENERGY AND VOLTAGE/CURRENT
RMS CALCULATION FOR PHASE B
(SEE PHASE A FOR DETAILED
DATA PATH)
TOTAL/FUNDAMENTAL ACTIVE/
REACTIVE ENERGIES, APPARENT
ENERGY AND VOLTAGE/CURRENT
RMS CALCULATION FOR PHASE C
(SEE PHASE A FOR DETAILED
DATA PATH)
DIGITAL SIGNAL
PROCESSOR
COMPUTATIONAL
BLOCK FOR
TOTAL
REACTIVE POWER
APHCAL
HPFDIS
[23:0]
HPF
HPFDIS
[23:0]
HPF
HPFDIS
[23:0]
DIGITAL
INTEGRATOR
HPF
DIGITAL
INTEGRATOR
POR LDO LDO
X
2
AIRMS
LPF
AIRMSOS
X
2
X
2
AVRMS
LPF
LPF
AVRMSOS
AVAGAIN
LPF
COMPUTATIONAL
BLOCK FOR
FUNDAMENTAL
ACTIVE AND
REACTIVE POWER
AWGAIN
NIRMS
NIRMSOS
AWATTOS
AVARGAIN AVAROS
AFWGAIN AFWATTOS
AFVARGAIN
AFVAROS
PHASE A, PHASE B,
AND
PHASE C
DATA
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 CF3/HSCLK IRQ0 IRQ1 SCLK/SCL MOSI/SDA MISO/HSD SS/HSA
ADE7878
ADC ADC ADC ADC ADC ADC
PGA2
15 16
INP
INN
ADC
08510-201
SPI
OR
I
2
C/HSDC
AVGAIN NIGAIN
AIGAIN
Figure 4. ADE7878 Functional Block Diagram