MAXQ3183-RAN+ datasheet(30/102 Pages) MAXIM

30 / 102 page

Low-Power, Multifunction, Polyphase AFE

with Harmonics and Tamper Detect

______________________________________________________________________________________

Operating Mode Register 2 (OPMODE2) (0x003)

BIT

NAME

FUNCTION

7, 3

—

Reserved.

DHARA

When set, disables automatic determination of the filter parameters for the harmonic filter coefficient. If

set by the host software, the host must set a value in the A1HARM filter coefficient register to

establish the operating frequency of this filter if harmonic-mode calculations are used. When cleared,

the MAXQ3183 automatically determines the value of the harmonic filter coefficient based on the

measured line frequency and the harmonic-order requested (AUX_CFG.ORDH).

DFUNA

When set, disables automatic determination of the filter parameters for the fundamental-mode filter. If

set by the host software, the host must set a value in the A1FUND filter coefficient register to establish

the operating frequency of this filter if fundamental-mode calculations are used. When clear, the

MAXQ3183 automatically determines the value of the fundamental-mode filter coefficient based on the

measured line frequency.

DFUN

When set, fundamental-mode calculations are disabled. Fundamental-mode calculations provide

information about power and energy that are consumed only at the fundamental line frequency apart

from any harmonics that could be present. Setting this bit disables all fundamental frequency registers

but allows the MAXQ3183 to calculate other parameters at a higher rate. Set this bit when (1)

fundamental mode values do not need to be read, and (2) R_ADCRATE needs to be reduced below its

default value.

These bits select the coefficient used in calculating apparent power.

00 = 1-phase, 3-wire (1P3W), or 3-phase, 4-wire (3P4W) (C = 1)

01 = 3-phase, 3-wire (3P3W) (C = 3/2)

10 = three voltages, three currents (3V3A) (C = 3/3)

2:1

WIRSYS

3P3W Wiring (01)

Bit:

Name:

—

DHARA

DFUNA

DFUN

—

WIRSYS

APPSEL

Reset:

VAB

VCB

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