Seems I have two options to generate a +- 10 volts from the AD5781B 18 bit DAC.
a) Feed +- 10 v ref into the ref inputs, and us the adc unity gain, preferably with the input bias current compensation
as per data sheet fig 52.
b) feed VrefP with +10v, VrefN with 0v, and us the times two option. , as per CN-0177 fig 1.
In terms of components, they seem similar,
Any thoughts on which would give the least output noise and most accuracy / lowest temperature drift ?
My 'guess' is option (b) ,