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CC2652RB: DAC, Prog. Current source usecase/s

Part Number: CC2652RB

Tool/software:

Hi,
I am considering CC2652RB for a new design - a key question/ requirement that I need to answer it's in regard to 8-bit DAC,
programmable current source capability. 
As far as I can tell - this DAC, Prog. current source is not (and, can't be?) extended
(directly) to any external pin, rather used in 
conjunction with on-chip comparator/s.
For my design/ application, I need a programmable current source, for the purpose of creating an external sensor excitation.

Any recommendation, app note/ ref design you can point me to that'll help me with my design goal? Please advise.