XC164CS Datasheet, PDF (58/71 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller

XC164
Derivatives
Electrical Parameters
1) _{TUE is tested at VAREF = VDDP + 0.1 V, VAGND = 0 V. It is guaranteed by design for all other voltages within}
the defined voltage range.
If the analog reference supply voltage drops below 4.5 V (i.e. V_AREF ≥ 4.0 V) or exceeds the power supply
voltage by up to 0.2 V (i.e. V_AREF = V_DDP + 0.2 V) the maximum TUE is increased to ±3 LSB. This range is not
100% tested.
The specified TUE is guaranteed only, if the absolute sum of input overload currents on Port 5 pins (see I_OV
specification) does not exceed 10 mA, and if V_AREF and V_AGND remain stable during the respective period of
time. During the reset calibration sequence the maximum TUE may be ±4 LSB.
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 (t_SYS = 1 / f_SYS).
Values for the basic clock t_BC depend on programming and can be taken from Table 14.
When the post-calibration is switched off, the conversion time is reduced by 12 x t_BC
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 , O n}
C _AINT - C _AINS
A/D Converter
C _AINS
Figure 14 Equivalent Circuitry for Analog Inputs
m cs 04879_p.vsd
Data Sheet
54
V2.1, 2003-06