Hello All,
We use a PXIe6556-HSDIO. We are trying to measure the leakage current of a device at particular pin by applying 3.3V and measuring the current drawn by the pin.
Our observation is that the current measurement accuracy was worse than 10%.
On replacing the DUT pin with a known resistor value (with other end connected to a different channel configured to sink the current), we observe that only if the sinking channel is forcing a 1V instead of 0V. Measured values are in the table attached.
We also came upon the graph of Quadrant behaviour ## in the 6556 specification sheet (attached). Could someone please explain this graph? We believe that the sinking channel voltage variation improving accuracy is due to this quadrant behaviour, please help.
Thanks.