+5V output of DAQ6229

[Ivan.Chen]

Hi,

I need a 3.3V voltage to source 70 analog switchs and don't want to use a dedicated Power supply. I find a +5V voltage output on the 6229's connector. Can this voltage output be programed to 3.3V? How much current can it source?

BR,

Ivan Chen

[Hillman]

Hi Ivan,

Thanks for the post and I hope your well.

The PCI 6229 has:

Output current drive		±5 mA
Overdrive protection		±25 V
Overdrive current		10 mA

Details from ni.com - link. If this wasnt enough you could then just create some output circuit to boost the current in the signal. 

As for the 3.3 voltage that should be fine, as you card can output upto +/- 10V. I would suggest looking at the DAQ API (if your using LabVIEW / LabWindows) if your not sure how to use the product. Both platforms ship with great examples - example finder. 

Did you have any other questions?

Kind Regards,

James.  

[AnalogKid2DigitalMan]

Hillman:

I think Ivan is refereeing to the 5V output terminal. In this case, it is fixed at 5V, 1A maximum. You may be able to find an off-the-shelf 5V to 3.3V Low Drop Out converter that could supply 3.3V out with a 5V input.

-AK2DM

[Ivan.Chen]

Hi Hillman & AK2DM,

I got it! I don't hope to use the digital or analog output to source the analog switch.

So I would consider to add a extenal regulartor to convert down the +5V voltage as AK2DM said.

Thank you very much!

BR,

Ivan Chen