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ADE7816 ICGAIN

Question asked by Terumasa on Sep 21, 2017
Latest reply on Oct 18, 2017 by Terumasa

Hello

 

Our customer is using ADE7816 evaluation board (EVAL-ADE7816EBZ ).

Then ,  IRMS value at ICGAIN 0xC00000 is different from expected value (0.5*Irms0).

IRMS at ICGAIN 0x400000 is the same as expected value (1.5*Irms0).

Please let me know your advice if our settings or expected value  is correct ?

 

His register settings is attached.

Attachment describes  the register settings of ICGAIN = 0xC00000,0x400000 and 0.

 

Input (Irms0)

22627LSB ( ICRMS value at attache ICGAIN=0 setting)

 

ICRMS:

0x5863 (22627) at ICGAIN=0x00000 

0x848F (33935LSB) at ICGAIN=0x400000

0xDD15(56597LSB)  at ICGAIN=0xC00000

 

Expected value estimation at ICGAIN=0xC00000

Irms =Irms0 *(1+ ICGAIN/2^23) .

ICGAIN is 2's complement and Irms=22627*(1+ (-2^22/2^23)   =11313.

 

Regards,

Terumasa

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