NI 9234 driving a microphone

[tetego]

Hi Everybody,

I would like to use NI 9234 and get samples from a microphone which ideally requires a phantom power supply (something like 48V). It seems that these microphones work with 12-48V phantom power supply. NI 9234 can supply a constant current on the order of 2mA. I am wondering if I can use 9234 to sample such microphone signals. Do I damage 9234 if I connect it to such microphones? Vice versa. Has anyone tried this before?

Thanks in advance

Engin

[Henrik_Volkers]

You can build a driving circuit* to drive a phantom powered mic with a IEPE input, but why not use a IEPE mic?

*) usualy done with a p-FET, an preamplifier and a clean! powerconverter since the IEPE settle at about 10 to 12V.

B&K , PCB, microtech Gefell,  ....   migth have some converters ....  PCB has IEPE mics ...