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Sigma-Delta ADC with equivalent specs to the AD7680 SAR ADC...

Question asked by mwfortner on Jun 17, 2013
Latest reply on Jun 18, 2013 by mwfortner

Hello,

 

I have a medical customer here in town that has been looking at the AD7680 SAR ADC for about a week now (meets most of their requirements).

 

However, they just recently came to me and asked if a Sigma-Delta architecture is a better fit for their sensor application.

 

Essentially, with the AD7680 the minimum operating voltage is 2.5V and they would prefer an ADC that operates lower than 2.5V.

 

I wanted to check with you to see if there is a Sigma-Delta ADC equivalent to the AD7680 with lower power and equavalent or better accuracy

 

Here’s a list of their criteria:

  • >= 100KSPS
  • 1-2 Channels
  • Serial Interface
  • Sigma-Delta Architecture
  • Sub-2.5V operating voltage


I checked Compass and the ADI parametric tool on the website, but could not find anything.

 

I'm hoping there is something I overlooked.

 

Thanks in advance for your help.

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