FAQ: What is the AGC loop settling time of the AD8347 for a pulsed RF input?

Document created by Qui Employee on Sep 20, 2011Last modified by AndyR on Jan 31, 2013
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Q.

What is the AGC loop settling time of the AD8347 for a pulsed RF input?

 

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A.

A step input was applied to the RF ports and the amount of time it took the VGA to settle to its final value was recorded.  The response time is dependent on the capacitor value on the VAGC pin.

CAP VALUE

RESPONSE TIME

1uF

50 usec

0.1uF

15 usec

0.01 uF

2 usec

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