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| ATMEGA1284P_1 Datasheet, PDF (252/380 Pages) ATMEL Corporation – 8-bit Microcontroller with 128K Bytes In-System Programmable Flash | |||
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Figure 21-12. Integral Non-linearity (INL)
Output Code
ATmega1284P
Ideal ADC
Actual ADC
VREF Input Voltage
⢠Differential Non-linearity (DNL): The maximum deviation of the actual code width (the interval
between two adjacent transitions) from the ideal code width (1 LSB). Ideal value: 0 LSB.
Figure 21-13. Differential Non-linearity (DNL)
Output Code
0x3FF
1 LSB
0x000
0
DNL
VREF Input Voltage
⢠Quantization Error: Due to the quantization of the input voltage into a finite number of codes, a
range of input voltages (1 LSB wide) will code to the same value. Always ±0.5 LSB.
⢠Absolute Accuracy: The maximum deviation of an actual (unadjusted) transition compared to
an ideal transition for any code. This is the compound effect of Offset, Gain Error, Differential
Error, Non-linearity, and Quantization Error. Ideal value: ±0.5 LSB.
8059DâAVRâ11/09
252
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