MAXQ3180 Maxim, MAXQ3180 Datasheet - Page 88

• 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

Low-Power, Multifunction, Polyphase AFE
This signed register contains the linearity offset for phase X current channel when the programmable gain amplifier
is set to gain of 32 (that is, the measured current is below the low current threshold). The signed value represented
by this register is added to the current value. The total linearity compensation is applied as follows:
This register contains the result of the RMS calculation on the AUX channel. Usually, this is the neutral current chan-
nel, but can be defined to be the RMS average of any harmonic of the quantities defined in the AUX_MUX field of the
AUX_CFG register.
88
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Linearity Offset, Low Range, Phase X = A/B/C (X.OFFS_LO) (A: 0x13C, B: 0x228, C: 0x314)
______________________________________________________________________________________
15
31
23
15
7
7
if LINFRM = 0: X.GAIN_LO/2
if LINFRM = 1: X.GAIN_LO/2
14
30
22
14
6
6
13
29
21
13
5
5
Linearity Offset High Byte
Linearity Offset Low Byte
14
RMS Result, Byte 3
RMS Result, Byte 2
RMS Result, Byte 1
RMS Result, Byte 0
x
12
28
20
12
4
4
14
X IRMS
x (X.IRMS + X.OFFS_LO)
.
0x00
0x00
On-Demand RMS Result (N.IRMS) (0x11C)
Measurements—RAM Registers
2
+
11
27
19
11
3
3
X OFFS LO
.
_
10
26
18
10
2
2
×
2
16
25
17
9
1
9
1
24
16
8
0
8
0