MAXQ3181 Maxim, MAXQ3181 Datasheet - Page 34

• 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
This register designates the threshold of the CFP pulse. This value is used to set the meter constant for the CFP
pulse output. When the CFP pulse accumulator exceeds the value set in this register, the CFP pulse output is acti-
vated and the CFP pulse accumulator is reduced by the amount in this register.
This register contains gain coefficient for phase X current channel. The raw values are taken from the selected mea-
surement quantity and scaled by the factor:
Note: Bit 15 of this register must be set to zero for correct operation.
34
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
______________________________________________________________________________________
Current Gain, Phase X = A/B/C/N (X.I_GAIN) (A: 0x130, B: 0x21C, C: 0x308, N: 0x12E)
31
23
15
15
7
7
30
22
14
14
6
6
29
21
13
13
5
5
Current Gain Coefficient High Byte
Current Gain Coefficient Low Byte
X I GAIN
. _
2
28
20
12
12
4
4
14
THR1 Byte 3
THR1 Byte 2
THR1 Byte 1
THR1 Byte 0
0x00
0x10
0x00
0x00
0x40
0x00
CFP Pulse Threshold (THR1) (0x022)
27
19
11
11
3
3
Calibration Registers
26
18
10
10
2
2
25
17
9
1
9
1
24
16
8
0
8
0