CC2650: Sensor Controller COMPA Settling Time

Hello,

I'm using the CC2650 chip with the Sensor Controller to measure COMPA cross over against a custom voltage reference and am trying to debug some odd behavior.

In the sensor control example code for COMPA the code cites an unknown settling time:

// Enable COMPA
compaEnable();

// Select COMPA reference and input
compaSelectGpioRef(AUXIO_A_REFERENCE);
compaSelectGpioInput(AUXIO_A_SIGNAL);

... Do other tasks while the COMPA output stabilizes

// Check the COMPA output
compaGetOutput(output.value);

// Disable COMPA
compaDisable(); 

The CC2650 datasheet does not elaborate on the compa stabilization time, can someone advise how long the settling time would be if using a external voltage reference? Where is this covered in a datasheet?