Hi Mario, I have a similar dilemma in a dsPIC33 device. I put in the recommended 10 ohm resistor, but there is approximately 150mV drop across it, which means that my Vref (which, just like in your case, is AVdd) is not quite 3.3V as I had designed. I wonder what people typically do in such a situation? Is it abnormal that the AVdd pin is drawing 15mA? It is difficult to determine from the datasheet because, while it tells you how much current the ADC draws, it doesn't say whether that is all drawn through the AVdd pin or if some of it is just an increased in the current drawn through the normal Vdd pins. Sean On Wed, Nov 23, 2011 at 6:03 AM, Electron wrote: > > Hello, > on the PIC32MX1XX data sheet they tell me to give current to AVdd and its= bypass > cap through a 10 ohm resistor (connected to Vdd). It's a LP RC filter of = course. > > Now, as the power supply noise will be high, and I need the best possible= precision > from the analog part of the MPU, I decided to put a ferrite bead, too. > > My question is: since I put a ferrite bead, is the 10 ohm resistor still = needed, > or does it become ~totally redundant? > > Thanks (and it's not to save 0.07 EUR on a resistor x board, believe me, = it's to > learn something and make the circuit without redundant components, that t= he space > is of primary importance and is already a problem (may become too big and= force > me to leave something out, it's not the case yet, though)). > > Cheers, > Mario > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .