PSoC 4 BLE idac

[Dirk_6716]

Hello, I want to use the iDAC as a current source and my load resistance varies. I understand that I am not able to output more than ~2V due to the compliance voltage. However, is there a way to know when I have reached that ceiling? Do I need to check the iDAC's output voltage with an ADC, or is there a better way to know?

Thanks!

[Vasanth · Accepted solution]

Hi,

From your description I am guessing that your VDDA around 2.8~3V, as the minimum compliance voltage is around 0.8V. Now it is bet to choose the DAC range and current driven according to the load. Unfortunately there is no way to detect this using a register read. ADC is the is best option to know this dynamically. If you have voltages to compare in the system, comparator is another option.

Best Regards,
Vasanth