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AD790 propagation delay with sin wave input

Question asked by ttse007 on Feb 3, 2018
Latest reply on Feb 27, 2018 by ttse007

Hello,

 

I understand that there is a propagation associated with input voltage overdrive. Is there any way I can relate this number to sin wave of different frequency and amplitude? Say 1kHz, 1V amplitude sin wave referenced at 0V.

 

I tried used a step function formula:

Vo == Ao*(1-exp(-t/Tc))*Vi

 

Vo = ~2 ((VOH-VOL/)2)

Vi = overdrive amplitude

Ao = DC gain

Tc = 1/wc, first pole frequency

 

This gave me sensible result if I had Vi a constant voltage but if I had Vi*sin(2*pi*f*t), it gives me unreasonably long result. I am guessing the hysteresis feedback comes into play?

 

Thanks.

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