ADE7753 WAVEFORM reading high with 0V input

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firmwaregirl

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Using the ADE7753 Eval board:

I am reading the WAVEFORM reg on the WSMP interrupt.

I have CH1N/CH1P and CH2N/CH2P tied to AGND, verified with a voltmeter to both be 0V inputs into the ADC.

On interrupt, with the CH1 setting I read ~0xff2928 (-55000) and with CH2 setting I read a more reasonable ~0xffff9c (-100).

Both of these readings are too big to offset with the CH1OS/CH2OS of +/-31, and the CH1 reading seems completely out of whack.

Any ideas?
 

Hi

Check whether the Clock is OK (3.58MHz)

Check whether the REF voltage is set to internal and it is stable

All the best

BObi

The microcontroller specialist
 

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