Electronics > Open Source Hardware

Active probe?

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Noy:
Pretty awesome new device for a DIY active probe:

Ti BUF802

https://www.ti.com/lit/ds/symlink/buf802.pdf?ts=1643347428244&ref_url=https%253A%252F%252Fwww.google.com%252F

JohnG:
Good luck getting any TI parts these days. They made some great parts, but it doesn't matter if they are unobtainium.

John

David Hess:
The Texas Instruments BUF802 looks ideal for a simple as possible design.  It can be improved by adding a divider to the input to lower its relatively high input capacitance which will otherwise limit performance.  Typically a x5 input divider would be used so that with the x2 attenuation of a double terminated output, x10 attenuation would result.  Many x10 active probes do exactly this.

KE5FX:
No shortage of BUF802s at DigiKey or TI's direct-sales outlet. 

However, you really want a differential probe. :)  Buy one from nctnico. 

JohnG:

--- Quote from: KE5FX on February 01, 2022, 02:56:23 am ---No shortage of BUF802s at DigiKey or TI's direct-sales outlet.

--- End quote ---

You are correct, sir! To be fair, a number of TI parts are hard to get these days, but apparently not this one.


--- Quote ---However, you really want a differential probe. :)  Buy one from nctnico.

--- End quote ---

I am a happy customer.

John

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