MAX71020_13 Datasheet, PDF (33/35 Pages) Maxim Integrated Products – Single-Chip Electricity Meter AFE

MAX71020
Single-Chip Electricity Meter AFE
MULTIPLEXER
I0
V0
I1
V_REF
DC
MOD
DECIMATOR
DEMULTIPLEXER
I0_RAW
V0_RAW
I1_RAW
fCLK = 2.458MHz
f_S = 2520Hz
(ON EACH CHANNEL)
Figure 10. CE Data Flow (Multiplexer and ADC)
I0_RAW
OFFSET
NULL
F0
V0_RAW
OFFSET
NULL
F0
I1_RAW
OFFSET
NULL
F0
F0
GENERATOR
CAL_I0
CAL_V0
CAL_I1 GAIN_ADJ
PHASE
COMP
PHADJ_0
90°
PHASE
COMP
PHADJ_1
Figure 11. CE Data Flow (Scaling, Gain Control, Intermediate Variables)
I0
LPF
W0
LPF
VAR0
V0
LPF
VAR1
LPF
W1
I1
F0
Maxim Integrated
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