ADE1202 A/D capabilities and parameters

I'd like to use ADE1202 As an isolated A/D but I have some questions:

1. I'm trying to estimate the A/D Error and I'm missing few key parameters:

  • VRef (Internal 1.25V) Accuracy and Ripple
  • Gain & Offset Drift vs Temperature

Is there an additional application note that specifies them? or do I need to contact Analog FE?

2. Am i able to leave GATE and LOAD1/2 Pins NC as I don't use them? 

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  • +1
    •  Analog Employees 
    on Jan 27, 2021 3:16 PM

    Hello:

    1. The GATE pin can be floated and you can connect the LOAD pin to ground through a small cap. 

    2. The specs you ask about are not included in the datasheet except for a typical plot for gain error over temp (Figure 19. ADC Gain Error vs. Temperature). Also Table 2 gives more information on gain and offset.

    Let me know if you need further assistance.

    Regards,

    Derek

  • Dear Derek, thanks for the detailed answer !

    I have more questions regarding calculating the TUE in specifiec ADC:

    1. Are the Maximum & Minimum values delcared in the datasheet (of Offset & Gain) are statistical and reffered as 4σ (Gausian)? or other n-σ ?

    2. If Yes, is it more convenient and accurate to use RSS Error method than sum of all maxium values (much pessimistic)  to achieve TUE?

    I assume that achieving the worst case error (summing all maximum errors) is pretty much rare and depends on the errors polarity (all errors probability to become worst at the same time)

Reply
  • Dear Derek, thanks for the detailed answer !

    I have more questions regarding calculating the TUE in specifiec ADC:

    1. Are the Maximum & Minimum values delcared in the datasheet (of Offset & Gain) are statistical and reffered as 4σ (Gausian)? or other n-σ ?

    2. If Yes, is it more convenient and accurate to use RSS Error method than sum of all maxium values (much pessimistic)  to achieve TUE?

    I assume that achieving the worst case error (summing all maximum errors) is pretty much rare and depends on the errors polarity (all errors probability to become worst at the same time)

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