pressure sensor

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is there way or arranjement using analogic reference(internal) pressure sensor? vss= 5,0v  vout+  = 2,40v  , vout-= 2,38v when interested reading difference (2,40v - 2,38v = 20mv )between vout+ , v0ut-. have tried putting resistors bringing voltage (2,4v , 2,38v) down 1.1v or less, it  seems not have worked because analog read remains showing max 1023. there way better resolution in pressure sensors (mpx family) without problems?

use op-amp convert differential signal single-ended output.

a starting point: http://www.allaboutcircuits.com/vol_3/chpt_8/9.html

you'll need tweak circuit bit provide "fake" ground of 2.5v (simple resistor divider).


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