AnsweredAssumed Answered

AD8314, V_UP - FILT, how to be choice of CF and series resistor ?

Question asked by sss on Jun 12, 2018
Latest reply on Jun 12, 2018 by jdobler

Hi all,

 

In the datasheet page 13, following is comment.

The video bandwidth is related to CF by

Video Bandwidth = 1 / 2 π × 13 kΩ × ( 3.5 pF + CF )

 

In the datasheet page 14, following is additional comment.

In practice, an improvement in loop dynamics can often be achieved by adding a response zero, formed by a resistor in
series with CF.

 

How to decide RC filter (Rs : series resistor) value ?

Video Bandwidth = 1 / 2 π × ( 13 kΩ + Rs ) × ( 3.5 pF + CF ) ?

Is it correct ? 

 

Best regards,

sss

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