Hi all!
I'm working on a device that produces an AC current with an RMS value between 50uA and 1mA and a frequency between 50kHz and 150kHz on an unknown load.
I'm looking for some kind of safety device to place after the V / I converter, that enable / disable the flow of current under certain conditions or redirect the current on a known load... I have some doubt about what kind of device could be good for my application.
Since the signals are weak (and sure noisy), I need a device with low noisy and also with a low Ron (I'm thinking about mosfets...) , but the device must work with an AC current, then I need a device that will works bidirectional...
I was looking an analog switch like this ADG419 but this device have an high Ron and this could be a problem for me ....
I also need to measure continously the value of this microcurrent:
- first on the known load;
- after on the unknown load.
If, for some reason, the current if more than a certain value, I stop the flow of the current on the unknown load and redirect the current on the known load.
Do you have any suggestion, idea or advice to give me?
Thank you in advance for your help or even for a brainstorming!
Cheers,
Mik
I'm working on a device that produces an AC current with an RMS value between 50uA and 1mA and a frequency between 50kHz and 150kHz on an unknown load.
I'm looking for some kind of safety device to place after the V / I converter, that enable / disable the flow of current under certain conditions or redirect the current on a known load... I have some doubt about what kind of device could be good for my application.
Since the signals are weak (and sure noisy), I need a device with low noisy and also with a low Ron (I'm thinking about mosfets...) , but the device must work with an AC current, then I need a device that will works bidirectional...
I was looking an analog switch like this ADG419 but this device have an high Ron and this could be a problem for me ....
I also need to measure continously the value of this microcurrent:
- first on the known load;
- after on the unknown load.
If, for some reason, the current if more than a certain value, I stop the flow of the current on the unknown load and redirect the current on the known load.
Do you have any suggestion, idea or advice to give me?
Thank you in advance for your help or even for a brainstorming!
Cheers,
Mik