The absolute accuracy formula is: N - log2 (EA), wherein EA refers to the absolute error; N refers to converter bits. The linearity formula is: N - log2 (INL), wherein INL refers to the Integral nonlinearity error; N refers to converter bits.

Refer to the ADC electrical characteristics chapter in the relevant Datasheet. The M051DN/DE series is used as example in the following table for illustration.

In the specification, the maximum absolute error is 4 LSB, and the maximum Integral nonlinearity error is 4 LSB.
Thus, the absolute accuracy is 12 bit - log2 (4) = 10 bit.

The linearity is 12 bit - log2 (4) = 10 bit.

For other series, please refer to the relevant Datasheet.

Products:	Microcontrollers ,Arm Cortex-M0 MCUs ,M051 Base Series ,M0518 Series ,M0519 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

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How many bits are required to present the accuracy and linearity of conversions when an analog-to-digital converter (ADC) in the NuMicro® series operates at the highest speed? Issue Date：2015-05-27

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