CC2652RB: DAC, Prog. Current source usecase/s

SmartEnrg

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.

over 2 years ago

0 Bun Kuch over 2 years ago

TI__Expert 7180 points

Hi,

You would have to disable the comparator to be able to route the current source to an analog I/O pin. See section 19.5.6.2.1 Programmable Current of the TRM (https://www.ti.com/lit/ug/swcu185g/swcu185g.pdf).

Also see, https://software-dl.ti.com/lprf/sensor_controller_studio/docs/cc13x2_cc26x2_help/html/isrc__1.html

Please note that the ISRC (AUX current source) does not have any accessible APIs or drivers outside of Sensor Controller Studio (SCS) meaning it can't be use directly from the Cortex M4.

Best regards,

Bun

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CC2652RB: DAC, Prog. Current source usecase/s