MAXQ3183-RAN+ datasheet(50/102 Pages) MAXIM

50 / 102 page

Low-Power, Multifunction, Polyphase AFE

with Harmonics and Tamper Detect

______________________________________________________________________________________

Energy Units Conversion Coefficient (ENR_CC) (0x01A) (continued)

DESCRIPTION

RAW

VIRTUAL

Reactive energy, phase C, positive direction, fundamental only

C.ERFPOS

Reactive energy, phase C, reverse direction, fundamental only

C.ERFNEG

ENRQF.C*

Reactive energy, total, fundamental only

—

ENRQF.T

Apparent energy, phase A, fundamental only

A.ESF

ENRSF.A

Apparent energy, phase B, fundamental only

B.ESF

ENRSF.B

Apparent energy, phase C, fundamental only

C.ESF

ENRSF.C

Apparent energy, total, fundamental only

—

ENRSF.T

To avoid significant conversion loss, ENR_LSB should be chosen such that ENR_CC is > 1000. Calculate the value

of ENR_CC according to the following formula:

Temperature Conversion Coefficient (TEMP_CC) (0x060)

This register contains the temperature conversion coefficient that is applied to convert the temperature sensor bina-

ry output into degrees Celsius, per the following equation, where RAW_TEMP is the raw temperature sensor output.

T_C = RAW_TEMP x TEMP_CC/216 - 273.15

Note that TEMP_CC should be obtained by calibrating the temperature sensor at the desired operation condition.

Typical approximate value is TEMP_CC = 0x0426. To read temperature, use the special register command 0xC01.

ENR CC

ENR LSB

××

216

These registers represent the algebraic sum of the positive and reverse energy in the two “raw” registers noted. Thus, the energy

accumulated in these virtual registers represents the net energy.

Bit:

Name:

Temperature Conversion Coefficient High Byte

Reset:

0x00

Bit:

Name:

Temperature Conversion Coefficient Low Byte

Reset:

0x00

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