XC164CS datasheet(58/71 Pages) INFINEON

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XC164

Derivatives

Electrical Parameters

Data Sheet

V2.1, 2003-06

Figure 14

Equivalent Circuitry for Analog Inputs

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.

VAREF ≥ 4.0 V) or exceeds the power supply

voltage by up to 0.2 V (i.e.

VAREF = VDDP + 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

IOV

specification) does not exceed 10 mA, and if

VAREF and VAGND remain stable during the respective period of

time. During the reset calibration sequence the maximum TUE may be

±4 LSB.

VAIN may exceed VAGND or VAREF up to the absolute maximum ratings. However, the conversion result in

these cases will be X000H or X3FFH, respectively.

The limit values for

fBC must not be exceeded when selecting the peripheral frequency and the ADCTC setting.

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 (

tSYS = 1 / fSYS).

Values for the basic clock

tBC 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

tBC

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.

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:

CAINTtyp = 12 pF, CAINStyp = 7 pF, RAINtyp = 1.5 kΩ, CAREFTtyp = 15 pF, CAREFStyp = 13 pF, RAREFtyp = 0.7 kΩ.

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