Electronics > Projects, Designs, and Technical Stuff
Low-Noise Front End Protection
<< < (4/4)
splin:

--- Quote from: Evan.Cornell on February 14, 2020, 08:03:20 pm ---I understand that, and the energy profile of piezo pulse is undefined, so I want to operate on the safer side. I am thinking series R = 10ohm or thereabouts with BAV199 to each rail, and another series R ~10ohm before AD8655 input.

--- End quote ---

https://www.analog.com/media/en/reference-design-documentation/reference-designs/CN0350.pdf

It shows a 1K series input resistor for protection. It's only a reference design and not guaranteed to be a robust, production ready design of course. 1K has approx 4nV/sqrt(Hz) which is similar to the opamp's noise, but noise and bandwidth limitations allowing, somewhat higher resistance could be used.

[EDIT] Of course the circuit note author may save assumed a securely mounted sensor not susceptible to hard knocks.
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod