carrotts
Member level 1
brige opamp
Can anyone help me. I am trying to interface a bridge sensor measuring gas pressure to a PIc. The output of the bridge is 0-40mV differential, offset around 2.52V. i.e. at 0 psi both bridge output pins are at 2.52 V, at around 50 psi the + pin is at 2.54 and the - pin is at 2.50. I can not get the accuracy required using only the PICs A/D so I need to amplify the output. What is the least number of op-amps I can use to do this. I only need an accuracy of about 1 PSI, so accuracy is not too important.
Thanks
carrotts
Can anyone help me. I am trying to interface a bridge sensor measuring gas pressure to a PIc. The output of the bridge is 0-40mV differential, offset around 2.52V. i.e. at 0 psi both bridge output pins are at 2.52 V, at around 50 psi the + pin is at 2.54 and the - pin is at 2.50. I can not get the accuracy required using only the PICs A/D so I need to amplify the output. What is the least number of op-amps I can use to do this. I only need an accuracy of about 1 PSI, so accuracy is not too important.
Thanks
carrotts
