FAQ

What needs to be considered in the VREF pin when using an ADC? Issue Date：2015-04-23

For all NuMicro™ series, the V_REF pin must be connected with an external capacitor, and its capacitance value needs to limit power supply ripple to be less than one LSB of ADC to avoid power noise to interfere with ADC accuracy. For example, if the 12-bit ADC and V_REFvoltage is 3.3V, the size of the ripple should be less than 3.3/(2^12) = 0.8mV.

Products:	Microcontrollers ,Arm Cortex-M0 MCUs ,M051 Base Series ,M0518 Series ,Mini51 Base Series ,Nano100/102 Base Series ,Nano110/112 LCD Series ,Nano120 USB Series ,Nano130 Advanced Series ,NUC029 Series ,NUC100/200 Advanced Series ,NUC120/122/123/220 USB Series ,NUC130/230 CAN Series ,NUC131/NUC1311 CAN Series ,NUC140/240 Connectivity Series ,Arm Cortex-M4 MCUs ,M451 Base Series ,M451M Series ,M452 USB Series ,M453 CAN Series ,NUC442/472 Series ,NUC505 Series
Applications:
Function:	Peripherals,Analog,ADC,Vref

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What needs to be considered in the VREF pin when using an ADC? Issue Date：2015-04-23

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