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Cascading OPA847 and VCA821

Other Parts Discussed in Thread: VCA821, OPA847

I cascaded the OPA847 and VCA821

my input signal was around 20mV (sine wave)

the OPA847 was set at a gain of 20.

the VCA821 was set at a gain of 2.

However, the output at the VCA821 looked like a square wave. What seems to be the problem here? How can I make the final output to be a sine wave?