A/D Conversion Accuracy Definitions - Renesas H8/38024 Hardware Manual

Figure 12.5 Flow Chart of Procedure for Using A/D Converter (Interrupts Used)
12.6

A/D Conversion Accuracy Definitions

This LSI's A/D conversion accuracy definitions are given below.
• Resolution
The number of A/D converter digital output codes
• Quantization error
The deviation inherent in the A/D converter, given by 1/2 LSB (see figure 12.6).
• Offset error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic
when the digital output changes from the minimum voltage value 0000000000 to 0000000001
(see figure 12.7).
• Full-scale error
The deviation of the analog input voltage value from the ideal A/D conversion characteristic
when the digital output changes from 1111111110 to 1111111111 (see figure 12.7).
Rev. 6.00, 08/04, page 398 of 628
Start
Set A/D conversion speed
and input channel
Enable A/D conversion
end interrupt
Start A/D conversion
A/D conversion
end interrupt?
No
Read ADRRH/ADRRL data
Yes
Yes
Clear bit IRRAD to
0 in IRR2
Perform A/D
conversion?
No
End