MAXQ3181 Maxim, MAXQ3181 Datasheet - Page 45

• Manufacturer Part Number: MAXQ3181
• Description: The MAXQ3181 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, active power and energy, and many other metering parameters of a polyphase load
• Manufacturer: Maxim

This register contains the value by which the raw accumulated energy value in each phase is multiplied before being
presented to the virtual energy registers. The table below lists the raw energy accumulators and the corresponding
virtual registers.
To avoid significant conversion loss, ENR_LSB should be chosen such that ENR_CC is > 1000. Calculate the value
of ENR_CC according to the following formula:
* These registers represent the algebraic sum of the positive and reverse energy in the two “raw” registers noted. Thus, the energy
returned in these virtual registers represents the net energy.
Real energy, phase A, positive direction
Real energy, phase A, reverse direction
Real energy, phase B, positive direction
Real energy, phase B, reverse direction
Real energy, phase C, positive direction
Real energy, phase C, reverse direction
Real energy, total
Apparent energy, phase A
Apparent energy, phase B
Apparent energy, phase C
Apparent energy, total
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Low-Power, Active Energy, Polyphase AFE
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15
7
DESCRIPTION
14
6
ENR CC
13
Energy Units Conversion Coefficient High Byte
5
Energy Units Conversion Coefficient Low Byte
Energy Units Conversion Coefficient (ENR_CC) (0x01A)
_
=
2
I
12
FS
16
4
×
×
V
ENR LSB
0x00
0x01
FS
×
_
t
FR
11
3
A.EANEG
B.EANEG
C.EANEG
A.EAPOS
B.EAPOS
C.EAPOS
RAW
10
A.ES
B.ES
C.ES
2
—
—
9
1
VIRTUAL
ENRP.A*
ENRP.B*
ENRP.C*
ENRS.A
ENRS.B
ENRS.C
ENRP.T
ENRS.T
8
0
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