30
4173ES–USB–09/07
AT89C5132
6.3.7 Analog to Digital Converter6.3.7.1 Definition of SymbolsTable 18. Analog to Digital Converter Timing Symbol Definitions6.3.7.2 CharacteristicsTable 18. Analog to Digital Converter AC CharacteristicsVDD = 2.7 to 3.3 V, TA = -40 to +85°C
Notes: 1. AVDD= AVREFP= 3.0 V, AVSS= AVREFN= 0 V. ADC is monotonic with no missing code.
2. The differential non-linearity is the difference between the actual step width and the ideal step
width (see Figure 6-20).
3. The integral non-linearity is the peak difference between the center of the actual step and the
ideal transfer curve after appropriate adjustment of gain and offset errors (see Figure 6-20).
4. The offset error is the absolute difference between the straight line which fits the actual trans-
fer curve (after removing of gain error), and the straight line which fits the ideal transfer curve
(see Figure 6-20).
5. The gain error is the relative difference in percent between the straight l ine whic h fit s the actua l
transfer curve (after removing of offset error), and the straight line which fits the ideal transfer
curve (see Figure 6-20).
Signals Conditions
C Clock H High
E Enable (ADEN bit) L Low
SStart Conversion
(ADSST bit)
Symbol Parameter Min Max Unit
TCLCL Clock Period 4 μs
TEHSH Start-up Time 4 μs
TSHSL Conversion Time 11·TCLCL μs
DLe Differential non-
linearity error(1)(2) 1LSB
ILe Integral non-linearity
errorss(1)(3) 2LSB
OSe Offset error(1)(4) 4LSB
Ge Gain error(1)(5) 4LSB