what can be the Maximum value of this Load Resistance which will not affect
Linearity, stability of the AD590?
Regarding AD590, the part should work correctly as long as the voltage is
maintained within specifications i.e. must ensure a minimum voltage of 4V
across V+ and V-.
The part is specified with a 1k resistor. If you use a 10k resistor, for
instance, then the voltage across the resistor is 298.2uA x 10k =2.98V.
Therefore V+ needs to set to 6.98V to ensure correct linearity. Stability
should not be an issue with a resistive load.