DAC81408: Regarding the headroom of output characteristics

Hi Kyohei-san,

Please check my response below - 

>> Regarding the output voltage headroom with the specifications below, is it correct to understand that if the current is around ±10mA, the output voltage range will narrow by at least 1V? 
 [TI] - In a way  - yes, that's correct. For ±10mA load current, output voltage Vo will be ~ (VCC - 1V). But we measure this spec is by setting the VCC/VSS power supplies equal to |Vo(range)| ± 1V and measure the device specs i.e. - INL/DNL, EPE, etc.

>> If you want to use the full set output voltage range, is it correct to understand that you need to input a Vcc with sufficient margin for the output voltage range?
[TI] - Correct. For example - for ± 10V range, VCC/VSS should be ± 11V.

>> Also, the output voltage range narrowed by the headroom only affects the upper voltage and does not impact the resolution, correct?
[TI] - Correct

Thanks,
Sanjay