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ADS1675: DRDY signal misbehaving

Deepak Sharma
Prodigy 225 points
Part Number: ADS1675

How can we configure this part to measure the -3.3 volt to 0. I am getting multiple spikes in the DRDY signal however datasheet shows only a spike in the start mode. I am not getting anything for CS.

Kindly help.

Thanks 

Deepak

  • 0
    TI__Mastermind 37570 points

    Hello Deepak,

    Can you send a copy or picture of your schematic so I can understand how you are connecting to the input of the ADC?

    Is your input a differential input, or single ended?  Please note that you cannot directly input -3.3V single relative to ground.  This will need to be level shifted with a differential amplifier, similar to Figure 55 in the datasheet.

    Regards,
    Keith Nicholas
    Precision ADC Applications