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Loading between channels on AD8672?

Question asked by cadornaa on Jun 22, 2017
Latest reply on Jul 3, 2017 by cadornaa

Im using the AD8672 on the dual op amp evaluation board to provide 2 output channels.

Both amplifier A and B are given the same 30us input signal. Amplifier A is behaves normally as long as Amplifier B is not connected to a scope (50ohm termination). Can anyone explain to me why this happening?

 

Ive attached the schematic as well as 2 scope captures.

Ch1 is the input signal.

Ch2 is the output of Amplifier A.

Ch3 is the output of Amplifier B.

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