MAXQ3181 Maxim, MAXQ3181 Datasheet - Page 40

• 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

Low-Power, Active Energy, Polyphase AFE
Line frequency, LSB = 0.001Hz.
Power factor of phase A/B/C, LSB = 1/2
indicates a reversed power flow direction.
This register provides the raw RMS voltage over the most recent DSP cycle, LSB = V
40
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Bit:
Name:
Bit:
Name:
Bit:
Name:
______________________________________________________________________________________
15
15
31
23
15
7
7
7
RMS Voltage, Phase X = A/B/C (X.VRMS) (A: 0x1C8, B: 0x2B4, C: 0x3A0)
Power Factor, Phase X = A/B/C (X.PF) (A: 0x1C6, B: 0x2B2, C: 0x39E)
14
14
30
22
14
6
6
6
14
. Note that the power factors are signed integers, and a negative value
13
13
29
21
13
5
5
5
Line Frequency High Byte
Line Frequency Low Byte
Power Factor High Byte
Power Factor Low Byte
RMS Voltage Byte 3
RMS Voltage Byte 2
RMS Voltage Byte 1
RMS Voltage Byte 0
12
12
28
20
12
4
4
4
0x00
0x00
11
11
27
19
11
3
3
3
Line Frequency (LINEFR) (0x062)
10
10
26
18
10
2
2
2
FS
/2
24
.
Measurements
25
17
9
1
9
1
9
1
24
16
8
0
8
0
8
0