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Why AD4841 is not rail-to-rail?

Question asked by richiechen on Jan 3, 2013
Latest reply on Mar 15, 2017 by FernandoAlcaide

Hi everyone

 

I am using AD7682 as an ADC and using its external voltage reference mode.

The external voltage reference is buffered by AD4841-2 dual OpAmp.

 

I power the AD4841 with +- 5.040V power supply. The voltage reference is +5.006V.

However, after buffered by AD4841, the +5.006V reference only becomes +4.386V.

 

It seems that AD4841 is not rail-to-rail,

 

Could anyone help on this?

Really appreciate.

 

 

Regards

Richie CHEN

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