Hi, I have been designing a pH meter.
I have the circuit for the meter part (a 10-step bargraph) LM3914
http://www.national.com/pf/LM/LM3914.html
But the electrodes output 0-300mV based on the pH.
The IC above has a 1.2V minimum full scale voltage.
Can someone please recommend an OP-Amp that runs on a 3V or 12V battery, not requiring any negative voltages, that can
input=0 - 300mV
output=0 - >1.2V (I'm not sure about the max. voltage from
http://www.national.com/pf/LM/LM3914.html)
Thanks
I have the circuit for the meter part (a 10-step bargraph) LM3914
http://www.national.com/pf/LM/LM3914.html
But the electrodes output 0-300mV based on the pH.
The IC above has a 1.2V minimum full scale voltage.
Can someone please recommend an OP-Amp that runs on a 3V or 12V battery, not requiring any negative voltages, that can
input=0 - 300mV
output=0 - >1.2V (I'm not sure about the max. voltage from
http://www.national.com/pf/LM/LM3914.html)
Thanks