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Help with sensor signal scaling for output

Posted by Tom in NOVA on July 15, 2011 at 4:00pm

Would like to ask for assistance with a 0-25mV pressure sensor that is made of a piezo bridge. The excitation voltage is 10V. How could I increase the 0-25mV to 0-5V or 0-10V without introducing a lot of error when the inherent accuracy is+/- 2%? If I use an Op Amp it think it would have too much noise. I do not have a precision power supply. Use oversampling? Use reference voltage?

Actually, the reading I am looking to amplify and read is only between the 8-20mV range.

Thank you for any input.

Tom

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0-25mv, adc, oversampling, pressure, sensor

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Tom in NOVA July 15, 2011 at 9:17pm

I will use a INA125 Instrumentation Amp w precision voltage ref. Not exxpensive and easy to interface.

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