W79E201 Datasheet, PDF (67/87 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E201
21. THE PERFORMANCE CHARACTERISTIC OF ADC
OFFSET ERROR
The offset error is the deviation between ideal transfer value and actual transfer value.
GAIN ERROR
The gain error is the difference between the slope of ideal transfer curve and the slope of actual
transfer curve.
DIFFERENTIAL NONLINEARITY (DNL)
The differential non-linearity is the difference between the actual step width and ideal step width. The
ideal step width is 1 LSB. The characteristic of DNL is as below figure.
INTEGRAL NONLINEARITY (INL)
The integral non-linearity is the deviation of a code from actual straight line. The deviation of each
code is measured from middle of this code. The characteristic of INL is as below figure.
21.1 The Differential Nonlinearity VS Output code
VDD − VSS = 5V ±10%, AVDD − VSS =5V, Vref=5V, TA = 25°C, Fosc = 16 MHz
Differential Nonlinearity vs Output Code
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
1 27 53 79 105 131 157 183 209 235 261 287 313 339 365 391 417 443 469 495 521 547 573 599 625 651 677 703 729 755 781 807 833 859 885 911 937 963 989 1015
Output Code
- 67 -
Publication Release Date: December 16, 2004
Revision A2