DAC0's output drop down after plugin
Posted 29 August 2012 - 12:32 PM
Posted 29 August 2012 - 01:01 PM
Ok, thanks a lot! The fact is I'm testing a circuit (which is an optocoupler in fact), so a buffer should be fine, but... now I'm looking to the specs once again and I see that the maximum voltage output a DAC can deliver is 4.775 V at 2.5 mA so... Am I right? Is the power 12 mW?
The source impedance of the DAC outputs is about 50 ohms. That is the main cause of voltage drop under load:
Posted 29 August 2012 - 01:52 PM
Posted 29 August 2012 - 01:57 PM
Posted 29 August 2012 - 02:12 PM
Perfect! Thanks again for the answers and the fast response!
I just did a test with my U3. I put a 47 ohm resistor from DAC0 to GND, set DAC0 to 5V, and got 1.7 volts across the resistor. That's about 60 mW.
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