I have a pressure transducer outputting 0-5V which is sampled by an ADC with a 0.5V minimum input voltage. I need to offset the sensor output voltage by a fixed voltage of 0.5V. I've looked at an op amp circuit for doing this. But I struggle with finding a practical way of generating a reference offset voltage that is temperature stable (I'm not sure about using a resistor divider down from Vdd).
Any ideas would be appreciated.
Incidentally, the upper limit of the ADC is irrelevant, as we will never get an output signal in that range. Therefore, I want unity gain.