TC1798 Datasheet, PDF (135/200 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

TC1798
Electrical ParametersDC Parameters
Table 23 ADC Parameters (cont’d)
Parameter
Symbol
Values
Unit Note /
Min. Typ. Max.
Test Condition
Resistance of the
reference voltage input
path
R_AREF
−
CC
500 1000 Ohm
Sample time
t_S CC 2
−
Calibration time after bit t_CAL CC −
−
ADC_GLOBCFG.SUCAL
is set
Total Unadjusted
Error^6)5)13)
TUE CC -4
−
-4
−
-14 −
Analog reference ground²⁾ V_AGNDx V_SSM - −
SR
0.05
257
4352
T_ADCI
cycle
s
4¹⁴⁾
4¹⁴⁾
14¹⁴⁾
V_AREFx
-1
LSB
LSB
LSB
V
ADC
resolution= 12-
bit
ADC = 0,1,2
ADC
resolution= 12-
bit ^{8) 9)}
ADC3 and
V_AIN ≤ V_AREFx -
0.15 V
ADC
resolution= 12-
bit ^{8) 9)}
ADC3 and
V_AREFx -
0.15 V ≤ V_AIN <
V_AREFx
Analog input voltage
V_AIN SR V_AGNDx −
Analog reference voltage²⁾ V_AREFx V_AGNDx −
SR
+1
V_AREFx V
V_DDM + V
0.05¹⁵⁾
16)
Analog reference voltage
range⁶⁾⁵⁾²⁾
V_AREFx -
V_AGNDx
SR
V_DDM/2 −
V_DDM + V
0.05
1) The sampling capacity of the conversion C-network is pre-charged to V_AREFx/2 before the sampling moment.
Because of the parasitic elements the voltage measured at AINx can deviate from V_AREFx/2.
2) Applies to AINx, when used as auxiliary reference input.
Data Sheet
128
V 1.1, 2014-05