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ADS7052: Supply current

Part Number: ADS7052

Hi Team,

I have two questions about supply current of ADS7052.

Supply current is shown on datasheet as below.

Do you have IDVDD for DVDD=3.0V?

Does the line marked in yellow mean that CS and SCLK have a significant impact on the consumption current on intermittent operation? Also, is it possible to intermittently drive with CS and SCLK high to reduce the current consumption of the digital part?

 


Best Regards,
Tom

  • Hi Liu,

    Please review the datasheet - section 10.2.1 Estimating Digital Power Consumption

  • Hi Tom,

    I am a bit confused about your answer to the second question.

    Also, for the first question, do you have IDVDD for DVDD=3.0V?

  • Hi Liu,

    The answer to both questions is in section 10.2.1 of the datasheet.  IDVDD is the digital current which is equal to Cload_sdo × V × F.  Use the noted 20 pF of the load capacitance on SDO X 3.0 X SCLK speed.  I do not know what your SCLK speed is, so I can't answer your IDVDD question directly.  In the highlighted portion of the table, the word 'static' means the part is idle (i,e, not converting), which is the same thing as being operated 'intermittently'. So yes, there is a direct relationship to IVDD when the device is idle versus in a converting state.  There is also a relationship to IDVDD depending on the conversion result - which is also noted in section 10.2.1.