cores/arduino/wiring_analog.c

@@ -73,6 +73,7 @@ uint32_t analogRead(uint32_t PinNumber)
       // extra least significant bits read from the ADC are discarded
       value = (value >> (MCU_ADC_RESOLUTION - currentResolution));
     }
+    additionalPinsDeinit(PinNumber);
   }
   else
     ErrorMsgHandler("analogRead(): invalid analog pin number");