XC2269I Datasheet, PDF (91/134 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller

XC2269I
XC2000 Family Derivatives / Premium 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
μs
powerdown, slow mode
1) These parameter values cover the complete operating range. Under relaxed operating conditions (room
temperature, nominal supply voltage) the 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 1 V and V_DDPA / 2 is used, there is an additional decrease of
the ADC speed and accuracy.
4) If the analog reference voltage is below V_DDPA but still in the range of V_DDPA / 2 and V_DDPA, the ADC errors
increase. Reducing the reference voltage by a factor k (k < 1) increases TUE, DNL, INL, Gain and Offset errors
by a factor 1/k.
5) If the analog reference voltage is above V_DDPA, the ADC errors increase.
6) TUE is based on 12-bit conversions.
TUE is tested at V_AREF = V_DDPA = 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
Figure 13 Equivalent Circuitry for Analog Inputs
MCS05570
Data Sheet
91
V1.3, 2014-07