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Hello, I'm trying to use an external reference voltage (1.25V) in my design. The problem is that I've got a ripple (+-50mV) which depends on the conversion rate / ADC-clock. I've selectet 'Externel Vref on P0', do I have to do more? It seems that this GPIO is not very high impedance or so..? If I switch the reference to internal, my external reference looks nice, so I excluded problems with my external design.