I'm very new to the topic but I read that some reference pins of some ICs should not be fed by voltage dividers because of impedance issues.
I need an adjustable +-4V output from an opamp or any suitable IC. The +-4V range adjustment should be done by a single pot. This adjustable voltage will be a reference voltage for the AD8226.
I have +-5V dual power supply to power all the circuit.
Basically I don't want to use heat-sink. I don't know if a voltage reference, voltage regulator or a opamp as a buffer is suitable for such circuit which will not drive much current(such as for a IC ref pin).
The thing is I need to be able to adjust between +4V to -4V just by using a single potentiometer.
To follow one of the suggestion safely I need an IC which can output both +5V and -5V as below(what is the generic name of such ICs if exists?):
I found this one: http://www.linear.com/product/LT3032 Would it be precise enough for this case? (Oh noo this requires an already dual supply:(()