•
•
Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 15.8).
Nonlinearity error
The error with respect to the ideal A/D conversion characteristic between the zero voltage and
the full-scale voltage. Does not include the offset error, full-scale error, or quantization error.
•
Absolute precision
The deviation between the digital value and the analog input value. Includes the offset error,
full-scale error, quantization error, and nonlinearity error.
Digital output
Ideal A/D conversion
characteristic
H'3FF
H'3FE
H'3FD
H'004
H'003
H'002
H'001
H'000
Quantization error
1
2
1022 1023 FS
1024 1024
1024 1024
Analog
input voltage
Figure 15.8 A/D Conversion Precision Definitions (1)
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