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On ADE7756 Chip

Question asked by mostafaq on Sep 28, 2014
Latest reply on Sep 30, 2014 by dlath

My Questions:

 

1.     Wave Form Sampling

        Data sheet says: 20-bit with upper 4-bit as sign extension.

        Does the ADC produce 20-bit value as Sign-Magnitude from; where lower 20-bit are always positive and upper 4-bit indicates sign.

        The lower 20-bit is negative if the upper 4-bits are all 1s; else lower 20-bit is positive.

        or the ADC produces 2's compliment code with upper 4-bit carries negative value of -2x2^20 and lower 20-bit carries positive vlaues

 

2.     What is the full scale of the ADC?

 

Regards,

 

Golam Mostafa

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