Pintek DP-60HS differential probe (low-voltage, high-sensitivity, 60 MHz BW)

[Zlotnik]

I was researching getting an affordable low voltage differential probe and stumbled over this thread. Interesting option! FWIW eleshop.eu carries the DP60-HS, but states "Please ask for lead time"...

If it proves hard to actually get one, I found Testec have a similar probe: TT-SI-7005

Only 15MHz @1x instead of 30MHz@1x as the DP60-HS, but otherwise almost identical specs. TT-SI-7005 noise is spec'ed at 2mVrms instead of the 1mVrms mentioned in this thread, but I did not actually see the 1mVrms in the DP60-HS specs, and some doubted it's realistic, so I'd call this a tie unless someone posts test results.
The Testec capacitance is a bit lower than the Pintek one (2.5pF vs 10pF differential, 6pF vs 20pF to ground) which starts to play a role towards the upper end of the bandwidth but may not be a huge advantage depending on the application. The DC impedance is spec'ed identical as 1M differential / 0.5M to ground. Input range / output swing is identical.

The TT-SI-7005 is easily available here in Europe, eg  Batronix, Reichelt or Conrad seem to have it in stock. Price is about comparable to the eleshop.eu price of the DP60-HS.

[leowood]

I just post a noise floor comparison between micsig DP10007 and this Pintech DP-60HS
I am very satisfy the noise performance of Pintech,
However the price of Pintech is crazy, 4 times higher than DP10007
here is link


also I attached the screenshot here

DP10007 1:10   VS  DP-60HS 1:10

also

DP10007 1:10 VS DP=60HS 1:1

[leowood]

below I set the input impedance from 1M to 50ohm

the noise looks like

1:10 Pintech DP-60HS VS 1:10 Micsig 10007

1:1 Pintech DP-60HS VS 1:10 Miscig 10007

[David Hess]

The Micsig has a lot more noise because it is a high voltage differential probe with more input attenuation and the Pintek is an allegedly low voltage differential probe with less input attenuation.  In order to meet their common mode input voltage specifications, they first attenuate and then apply differential gain to achieve the required differential sensitivity.  The more they attenuate the input signal, the more differential gain is required and the higher their noise is.

I do not really consider the Pintek to be a low voltage differential probe because it has input attenuation.  It still has a lot more noise than a true low voltage differential probe, which would have noise in the 50 to 200 microvolt range.