XC2230L datasheet(78/112 Pages) INFINEON

78 / 112 page

XC2230L, XC2234L

XC2000 Family / Econo Line

Electrical Parameters

Data Sheet

V1.3, 2015-02

Figure 15

Equivalent Circuitry for Analog Inputs

Sample time and conversion time of the XC223[04]L’s A/D converters are

programmable. The timing above can be calculated using Table 23.

The limit values for

ADCI must not be exceeded when selecting the prescaler value.

Wakeup time from analog

powerdown, fast mode

WAF CC

−−

8.5

μs

Wakeup time from analog

powerdown, slow mode

WAS CC

−−

15.0

μs

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

DDPB / 2 is used, then there are additional decrease

in the ADC speed and accuracy.

4) If the analog reference voltage range is below

DDPB but still in the defined range of VDDPB / 2 and VDDPB 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 >

DDPB, then the ADC converter errors increase.

6) TUE is based on 12-bit conversion.

7) TUE is tested at

AREF = VDDPB = 3.3 V, VAGND = 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

OV specification) does not exceed 10 mA, and if VAREF and VAGND remain stable during the

measurement time.

Table 22

ADC Parameters for Lower Voltage Range (cont’d)

Parameter

Symbol

Values

Unit

Note /

Test Condition

Min.

Typ.

Max.

A/D Converter

MCS05570

Source

AIN

Ext

AINT

AINS

AIN, On

AINS

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