Datasheet

71M6513/71M6513H

3-Phase Energy Meter IC

DATA SHEET

AUGUST 2011

A Maxim Integrated Products Brand

Address

Name

Description

FREQU_SEL = 0 FREQU_SEL = 1 FREQU_SEL = 2

0x52

PH_AtoB_X

Phase lag from VA to VB.

Phase lag from VB to VC.

Phase lag from VC to VA.

Angle in degrees PH_AtoB_X*360/NACC+2.4 PH_AtoB_X*360/NACC+2.4 PH_AtoB_X*360/NACC-4.8

0x53

PH_AtoC_X

Phase lag from VA to VC.

Phase lag from VB to VA.

Phase lag from VC to VB.

Angle in degrees PH_AtoC_X*360/NACC+4.8 PH_AtoC_X *360/NACC-2.4 PH_AtoC_X *360/NACC-2.4

0x55 MAINEDGE_X

The number of zero

crossings of VA in the pre-

vious accumulation interval.

The number of zero

crossings of VB in the pre-

vious accumulation interval.

The number of zero

crossings of VC in the pre-

vious accumulation interval.

Edge crossings are either direction and are debounced.

Temperature Measurement and Temperature Compensation

Input variables: TEMP_NOM is the reference value for temperature measurement, i.e. when this value is set with

TEMP_RAW_X at known temperature. The 71M6513/6513H measures temperature with reference to this value.

DEGSCALE is the slope or rate of temperature increase or decrease from the TEMP_NOM for TEMP_X measurement.

PPMC and PPMC2 are temperature compensation coefficients. Their values should reflect the characteristics of the band gap

voltage reference of the chip. PPMC and PPMC2 follow the square law characteristics to compensate for nonlinear temperature

behaviors, when the 71M6513/6513H is in internal temperature compensation mode.

EXT_TEMP allows the MPU to select between direct control of GAIN_ADJ or management of GAIN_ADJ by the CE, based on

TEMP_X and the temperature correction coefficients PPMC and PPMC2.