Please let me know about the input filter of LT6106.The customer considers LT6106 by the following circuitry.However, the output of LT6106 oscillates it by this constitution.
LT6106 behaves normally when I insert resistance between LT6106 and capacitors as follows.
Can the input terminal of LT6106 not connect a direct capacitor?If so, please let me know the reason why LT6106 cannot connect the capacitor to.
If you have any question, please let me know.
A capacitor value of 0.1uF would mean fc=159kHz which is near to the BW of LT6106 which is around 200kHz.
Try increasing the value of capacitor to at least 1uF.
You cannot put the cap directly across the input terminals for the same reason you can't put a
cap across an op amp input terminals. See:
Thank you for an answer.
I will use your opinion as a reference.
I understood that the capacitor of the input terminal was not recommended.
I will advise the customer about the deletion of the capacitor.
Is there the problem when they need an input filter if it is the following composition?
It connects a capacitor to an input terminal through 50ohm.
To add, this article is a good reference for putting input filter for current sensing.
Hope it helps.