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 |