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Using 4.5 V supply opamps in conjunction with 3.6V ADC

Question asked by PeterTrollens on Mar 26, 2018
Latest reply on Mar 27, 2018 by PeterTrollens

Hello,

 

I am asking for advice on the following matter:

 

I would like to use the ADA4530-1 and ADA4528-1 opamps in conjunction with an AD7124-4 ADC.

The minimum supply voltage for the opamps is 4.5 V whereas the maximum supply for the ADC is 3.6V.

 

The arising problem is that the maximum output level of the opamps can exceed the max input voltage to the ADC.

What is the best way to deal with this issue. What I have considered so far are the use of a funnel amplifier or an active clipping circuit. But for the sake of noise and simplicity I am hoping that there is a
better way to address this.

 

Any help is highly appreciated!

 

Best regards
Peter

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