XC2220U Datasheet, PDF (71/105 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller with 32-Bit Performance

XC2220U
XC2000 Family / Compact Line
Electrical Parameters
Table 22 ADC Parameters for Lower Voltage Range (cont’d)
Parameter
Symbol
Values
Unit Note /
Min. Typ. Max.
Test Condition
Wakeup time from analog t_WAF CC −
−
8.5 μs
powerdown, fast mode
Wakeup time from analog t_WAS CC −
−
15.0 μs
powerdown, slow mode
1) These parameter values cover the complete operating range. Under relaxed operating conditions
(temperature, supply voltage) typical values can be used for calculation.
2) The sum of DNL/INL/GAIN/OFF errors does not exceed the related TUE total unadjusted error.
3) If a reduced analog reference voltage between 1V and V_DDPB / 2 is used, then there are additional decrease
in the ADC speed and accuracy.
4) If the analog reference voltage range is below V_DDPB but still in the defined range of V_DDPB / 2 and V_DDPB is
used, then the ADC converter errors increase. If the reference voltage is reduced by the factor k (k<1), TUE,
DNL, INL, Gain and Offset errors increase also by the factor 1/k.
5) If the analog reference voltage is > V_DDPB, then the ADC converter errors increase.
6) TUE is based on 12-bit conversion.
7) TUE is tested at V_AREF = V_DDPB = 3.3 V, V_AGND = 0 V. It is verified by design for all other voltages within the
defined voltage range. The specified TUE is valid only if the absolute sum of input overload currents on analog
port pins (see I_OV specification) does not exceed 10 mA, and if V_AREF and V_AGND remain stable during the
measurement time.
V _AIN
R_Source
C _Ext
R_{AIN, On}
A/D Converter
C _AINT - C _AINS
C_AINS
MCS05570
Figure 14 Equivalent Circuitry for Analog Inputs
Sample time and conversion time of the XC2220U’s A/D converters are programmable.
The timing above can be calculated using Table 23.
The limit values for f_ADCI must not be exceeded when selecting the prescaler value.
Data Sheet
67
V1.2, 2012-07