Intel 8253 - Page 223

0…111
0…101
0…100
0…011
0…010
0…001
0…000
0…110
10 2 3 4 5 6 7
Total Error
At Step 0…101
(-1 1/4 LSB)
Total Error
At Step 0…001
(1/2 LSB)
Digital
Output
Error
Analog Input Value (LSB)
(a) ADC
Total Error
At Step 0…011
(1 1/4 LSB)
0…000
0…001
0…010
0…011
0…100
0…101
0…110
0…111
Digital Input Code
(b) DAC
0
0…101
0…101
1
2
3
4
5
6
7
Analog Output
Value (LSB)
Absolute Accuracy (Total) Error
The absolute accuracy or total error of an ADC as shown in Figure is the maximum value of the difference between an analog value
and the ideal midstep value. It includes offset, gain, and integral linearity errors and also the quantization error in the case of an
ADC.
Analog and Mixed Signal Center, TAMU (ESS)