XC161CJ_02 Datasheet, PDF (61/78 Pages) Infineon Technologies AG – 16-Bi t Single-Chip Microcontroller Preliminary

Preliminary
XC161
Derivatives
Electrical Parameters
2) _{VAIN may exceed VAGND or VAREF up to the absolute maximum ratings. However, the conversion result in}
these cases will be X000_H or X3FF_H, respectively.
3) _{The limit values for fBC must not be exceeded when selecting the peripheral frequency and the ADCTC setting.}
4) _{This parameter includes the sample time tS, the time for determining the digital result and the time to load the}
result register with the conversion result.
Values for the basic clock t_BC depend on programming and can be taken from Table 14.
5) _{The actual duration of the reset calibration depends on the noise on the reference signal. Conversions}
executed during the reset calibration increase the calibration time. The TUE for those conversions may be
increased.
6) _{Not 100% tested, guaranteed by design and characterization.}
The given parameter values cover the complete operating range. Under relaxed operating conditions
(temperature, supply voltage) reduced values can be used for calculations. At room temperature and nominal
supply voltage the following typical values can be used:
C_AINTtyp = 12 pF, C_AINStyp = 7 pF, R_AINtyp = 1.5 kΩ, C_AREFTtyp = 15 pF, C_AREFStyp = 13 pF, R_AREFtyp = 0.7 kΩ.
R_Source
V_AIN =
C_Ext
R_{AIN, On}
C_AINT - C_AINS
A/D Converter
C_AINS
Figure 12 Equivalent Circuitry for Analog Inputs
mcs04879_p.vsd
Data Sheet
57
V1.0, 2002-03