Datasheet

ADE7854/ADE7858/ADE7868/ADE7878 Data Sheet
Rev. G | Page 6 of 100
PGA1 PGA1 PGA1
PGA3 PGA3 PGA3
1.2V
REF
DIGITAL SIGNAL
PROCESSOR
COMPUTATIONAL
BLOCK FOR
TOTAL
REACTIVE POWER
APHCAL
POR LDO LDO
X
2
AIRMS
LPF
AIRMSOS
X
2
AVRMS
LPF
LPF
AVRMSOS
AVAGAIN
AVARGAIN AVAROS
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/HS
A
ADE7858
ADC ADC ADC ADC ADC
ADC
08510-203
TOTAL ACTIVE/REACTIVE/
APPARENT ENERGIES AND
VOLTAGE/CURRENT
RMS CALCULATION FOR PHASE B
(SEE PHASE A FOR DETAILED
DATA PATH)
TOTAL ACTIVE/REACTIVE/
APPARENT ENERGIES AND
VOLTAGE/CURRENT
RMS CALCULATION FOR PHASE C
(SEE PHASE A FOR DETAILED
DATA PATH)
PHASE A,
PHASE B,
AND
PHASE C
DATA
AWGAIN AWATTOS
HPF
HPFDIS
[23:0]
HPFDIS
[23:0]
DIGITAL
INTEGRATOR
HPF
SPI
OR
I
2
C/HSDC
AVGAIN
AIGAIN
Figure 2. ADE7858 Functional Block Diagram