TC290 Datasheet, PDF (355/476 Pages) Infineon Technologies AG – 32-Bit Single-Chip Micocontroller

TC290 / TC297 / TC298 / TC299 BB-Step
Electrical SpecificationVADC Parameters
Table 3-27 VADC (cont’d)
Parameter
Symbol
Values
Unit Note / Test Condition
Min.
Typ.
Max.
Resistance of the pull-down R_PDD CC -
-
0.3
kOhm
test device ¹⁰⁾
CSD voltage accuracy ^{11) 12)} dVCSD CC -
-
10
%
1) 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. V_AREF must be decoupled with an external capacitor.
2) For QCONV = X pC and a conversion time of 1 µs a rms value of X µA results for I_AREFx.
3) For the details of the mapping for a VADC group to pin V_AREFx please see the User's Manual.
4) The broken wire detection delay against V_AGND is measured in numbers of consecutive precharge cycles at a conversion
rate higher than 1 conversion per 500 ms.
5) The broken wire detection delay against V_AREF is measured in numbers of consecutive precharge cycles at a conversion
rate higher than 1 conversion per 10 ms. This function is influenced by leakage current, in particular at high temperature.
6) Resulting worst case combined error is arithmetic combination of TUE and EN_RMS.
7) This parameter is valid for soldered devices and requires careful analog board design.
8) Value is defined for one sigma Gauss distribution.
9) In order to avoid an additional error due to incomplete sampling, the sampling time shall be set greater than 5 * R_CSD * C_AINS.
10) The pull-down resistor R_PDD is connected between the input pad and the analog multiplexer. The input pad
itself adds another 200-Ohm series resistance, when measuring through the pin.
11) CSD: Converter Self Diagnostics, for details please consult the User's Manual.
12) Note, that in case CSD voltage is chosen to nom. 1/3 or 2/3 of V_AREF voltage, the reference voltage is loaded with a current
of max. V_AREF / 45 kOhm.
The following VADC parameter are valid for V_DDM = 2.97 V to 4.5 V.
This table also covers the parameters for Class D pads.
Table 3-28 VADC_33V
Parameter
Analog reference voltage ¹⁾
Analog reference ground
Analog input voltage range
Converter reference clock
Charge consumption per
conversion ^{2) 3)}
Conversion time for 12-bit
result
Symbol
V_AREF SR
V_AGND SR
V_AIN SR
f_ADCI SR
Q_CONV CC
Min.
V_AGND +
1.0
V_SSM -
0.05
V_AGND
2
-
Values
Typ.
-
-
-
-
35
Max.
V_DDM +
0.05
V_SSM +
0.05
V_AREF
20
50
-
8
17
t_C12 CC
-
(16 +
-
STC) x
t_ADCI + 2 x
t_VADC
Unit Note / Test Condition
V
V
V
MHz
pC
pC
V_AIN = 3.3 V, charge
consumed from
reference pin,
precharging disabled
V_AIN = 3.3 V, charge
consumed from
reference pin,
precharging enabled
Includes sample time
and post calibration
Data Sheet
3-349
V 1.1 2015-05
TC290/TC297/TC298/TC299 BB-Step Data Sheet downloaded by saravanakumar maniyam (larsen and Toubro limited) at 08 Sep 2015 08:06