Current Probe with Aceinna Current Sensors for Scopes

[B0B45]

Hey everyone,

I'm planning to rebuild my old current probes, based on an LEM hall-sensor, with new Sensor ICs from Aceinna (https://www.aceinna.com/current-sensors/5V%20Current%20Sensors). The main reason for a change is a bad design of the powersupply. This time I would like to use a switching regulator for the dual-power-supply.
The origin of the idea is the design from https://www.elektormagazine.de/labs/potential-free-current-measurement-for-oscilloscopes-150170

The new design is a first concept for the current probe. Feel free to comment, every advice is welcome at this point
Later on I can take some picture of the old probes and scope plots of the sensors.

-B0B

[B0B45]

Here is a screenshot comparing the output of the MCA1101-5-5 (blue) vs LEM LTS 25-NP (yellow).

[trobbins]

Hi Bob, you show two scope plots - can you elaborate on the circuit configurations used for each plot, and the test conditions?  If that is the noise floor of each configuration, it may be more meaningful to show performance as a frequency spectrum plot (maybe your scope has that capability or you have a soundcard and software set up to do it).

Is it the noise floor that is the concern, or did you think the Aceinna sensor would achieve a wider bandwidth, or better insulation, or DC accuracy ...?

Ciao, Tim