Maximum voltage of external Vref on Delta Sigma ADC

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Anonymous
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        What is the maximum voltage of external Vref I can put on 12-bit Delta Sigma ADC?. On datasheet the spec is written for 20-bit (which is 1.3V). Is it also for other bit number?.   
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Anonymous
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 The maximum voltage for the external reference input can be 1.3V. It is same across different resolutions.

   

Regards,

   

Senthilnathan

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Anonymous
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        Thanks Senthilnathan, One more thing. What is the temperature coefficient of SAR ADC?. For Delta Sigma it is written 0.55 uV/degreeC, but for SAR ADC I couldn't find it on datasheet.   
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