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ADA4896 oscillates at ~90MHz

Question asked by antonf on Jun 21, 2017
Latest reply on Jun 22, 2017 by JinoL

We use ADA4896 as unity gain buffer, single power supply (0V, +5V). Schematics is attached to the message. We connect input to the laboratory voltage source. We observe oscillations at ~90MHz. The amplitude of the oscillations varies between 0.3V and 3V depending on input voltage changes. We checked also input voltage-it is clean. Datasheet and openloop gain/phase plots say ADA4896 is unity gain stable with large phase margin. Please advise!

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