May I know the output current of AD8597.
The datasheet says only the Short circuit current.
If you can tell me how to calculate the opamp output current for different loads it is well and Good.
Looking at the spec table for ex. on table 3, Iout(high) = Vout(high)/RL =13.4/600 = ~22mA and 13.7/2k = ~7mA. Apply the same with Iout(low) with Vout(low) specs at RL condition given.
You can check as well Figure 23 and Fig. 26 for different values of Iload.