Extending the question: Scaling Voltage for Arduino Analog In, Beyond Voltage Dividers
Making a simple digital thermometer. Ideally, my circuit will only need a 3.3v supply. The sampling will be by a PIC 8 bit ADC. I'm hoping to achieve full scale accuracy by scaling up the output voltage from the thermistor potential divider, using an easily obtainable, cheap op-amps or alternative.
Perhaps someone could recommend low voltage single rail op-amps, (not op-amp circuits) or any really clever transistor circuits or similar that only use one or two cheap components to get better accuracy measuring a thermistor in certain ranges than just a potential divider fed straight to the ADC.
Edit: Thanks for the response on the LT1677, however I'm having real trouble finding a retailer for one-offs! It's a little bit on the pricey side as well, so I'm still looking for alternatives.
I'm thinking of adding a 5v rail to my scaling circuit, so I can use LM2904N instead and get approx full accuracy, it's a cheap dual with full swing on the lower rail and just 1.5v less than full swing on the upper rail. Not ideal tho.