MAXQ3183 Maxim, MAXQ3183 Datasheet - Page 47
MAXQ3183
Manufacturer Part Number
MAXQ3183
Description
The MAXQ3183 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, power, energy, and many other metering and power-quality parameters of a polyphase load
Manufacturer
Maxim
Datasheet
1.MAXQ3183.pdf
(102 pages)
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This register contains the value by which the raw voltage value in each phase (A.VRMS, B.VRMS, and C.VRMS) is
multiplied before being presented to the virtual RMS voltage registers (V.A, V.B, and V.C).
To determine the value of VOLT_CC, a voltage value for the least significant bit (VOLT_LSB) of the V.X registers must
be selected. Typical values might range from 1mV to 1nV. To avoid significant conversion loss, VOLT_LSB should be
chosen such that VOLT_CC is >1000. Once VOLT_LSB is determined, calculate VOLT_CC from the following equa-
tion:
This register contains the value by which the raw current value in each phase (A.IRMS, B.IRMS, C.IRMS, and
N.IRMS) is multiplied before being presented to the virtual RMS current registers (I.A, I.B, I.C, and I.N). To determine
the value of AMP_CC, a current value for the least significant bit (AMP_LSB) of the I.X registers must be selected.
Typical values might range from 1nA to 10μA. To avoid significant conversion loss, AMP_LSB should be chosen
such that AMP_CC is >1000. Once determined, calculate AMP_CC from the following equation:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset
Low-Power, Multifunction, Polyphase AFE
______________________________________________________________________________________
15
15
7
7
with Harmonics and Tamper Detect
14
14
6
6
VOLT CC
Voltage Units Conversion Coefficient (VOLT_CC) (0x014)
AMP CC
13
Voltage Units Conversion Coefficient High Byte
13
Current Units Conversion Coefficient High Byte
Voltage Units Conversion Coefficient Low Byte
Current Units Conversion Coefficient Low Byte
5
Current Units Conversion Coefficient (AMP_CC) (0x016)
5
_
_
Virtual Register Conversion Coefficients
=
=
2
2
12
12
24
24
4
4
×
×
VOLT LSB
AMP LSB
0x00
0x01
0x00
0x01
I
V
FS
FS
_
_
11
11
3
3
10
10
2
2
9
1
9
1
8
0
8
0
47
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