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Cascading a AD8250 and a AD8253

Question asked by PatrickLafont on May 22, 2015
Latest reply on May 22, 2015 by harryh

I want to build a high variable gain amplifier and have cascaded a AD8250 and an AD8253 in order to have the gain to vary in the 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, 5000, 10,000.

However, I have experienced a strange distorsion for low amplitude signals. Maybe cascading these 2 amplifiers is a wrong idea ?

Thank you for your help.

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