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Analog Discovery - Bandwidth of input and input capacitance

Question asked by Deiv on Jun 6, 2013
Latest reply on Jun 7, 2013 by dmercer

The analog discovery's inputs are specified at 24 pF input capacitance parallel with 1 Mohm.

I assume this is specified with the probing wires.

Without this probing wires, it could be about 5pF... or am I wrong?

 

If the input signal is kept within +/- 1.8V, can the bandwidth of the input be improved to about 50MHz?

Or is there a low pass filter that attenuates higher frequencies?

I see from the link below that there is 99% magnitude at 5MHz and 97.5% magnitude at 10MHz.

http://www.jensign.com/Discovery/About/index.html

 

Do you think a FET op amp external to the input could improve the bandwidth by reducing the capacitance further?

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