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MPX2202DP operating voltage minimum?

Question asked by Mark Forbes on Jun 23, 2016
Latest reply on Jun 27, 2016 by David Diaz Marin

I have a design using three MPX2202DP pressure sensors. They're currently operating from a 10.0V reference source, the nominal value in the datasheet. I find that I need to reduce the amplified output voltage of my circuit (gain-of-80 instrumentation amp) to accommodate my A-to-D converter. I was going to pad down the output with a resistor, but then I got to thinking....

 

Since the MPX2202DP is ratiometric, can I reduce the drive voltage from 10.0V to some lower value, thereby reducing the full-scale differential output and thus my final amplified output voltage? If yes, is there active circuitry inside the part which will stop working at some minimum supply voltage? And if that is true, what IS that minimum?

 

The datasheet shows a nominal 10V supply and a maximum of 16V. The minimum is shown as "--", which might imply zero, or might imply that it doesn't work, or that nobody bothered to try it and write it down. Which one is it?

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