MAXQ3180 Maxim, MAXQ3180 Datasheet - Page 53

• Manufacturer Part Number: MAXQ3180
• Description: The MAXQ3180 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

This register contains the RMS voltage on phase A/B/C. The units are defined by the VOLT_CC setting such that V.X
= X.VRMS x VOLT_CC. In this equation, VOLT_CC is the conversion coefficient. See the VOLT_CC register for more
information.
This register contains the RMS current on phase A/B/C or the neutral channel. The units are defined by the AMP_CC
setting such that I.X = X.IRMS x AMP_CC. In this equation, AMP_CC is the conversion coefficient. See the AMP_CC
register for more information.
This signed register contains the power factor of the total power. The power factor is calculated as:
It is expressed in units of 0.00001; thus, unity power factor is expressed as decimal 100,000
(0x00000000000186A0). This register is presented as a two’s complement value, so that a load delivering real power
to the line (that is, reverse power) is seen as having a power factor of -1 (0x0000FFFFFFFE7960).
Low-Power, Multifunction, Polyphase AFE
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Byte 7 (MSByte unused)
Byte 7 (MSByte unused)
Byte 7 (MSByte unused)
RMS Amps, Phase X = A/B/C/N (I.X) (A: 0x841, B: 0x842, C: 0x844, N: 0x840)
Byte 5
Byte 3
Byte 1
Byte 5
Byte 3
Byte 1
Byte 5
Byte 3
Byte 1
RMS Volts, Phase X = A/B/C (V.X) (A: 0x831, B: 0x832, C: 0x834)
PF T
.
=
A ACT B ACT C ACT
A APP B APP C APP
.
.
+
+
.
.
+
+
.
.
Power Factor (PF.T) (0x867)
Byte 6 (unused)
Byte 6 (unused)
Byte 6 (unused)
Byte 0 (LSByte)
Byte 0 (LSByte)
Byte 0 (LSByte)
Byte 4
Byte 2
Byte 4
Byte 2
Byte 4
Byte 2
Voltage and Current
Power Factor
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