XC835 Datasheet, PDF (34/56 Pages) Infineon Technologies AG – 8-Bit Single-Chip Microcontroller

XC835/836
Electrical Parameters
3.2.3 ADC Characteristics
The values in Table 10 are given for an analog power supply of 5.0 V. The ADC can be
used with an analog power supply down to 3 V. But in this case, analog parameters may
show a reduced performance. In the reduced voltage mode (2.5 V < V_DDP < 3 V), the
ADC is not recommended to be used.
Table 10
Parameter
ADC Characteristics (Operating Conditions apply; V_DDP = 5 V;
f_ADCI <= 12 MHz)
Symbol
Limit Values Unit Test
Min. Typ. Max.
Conditions /
Remarks
Analog reference
voltage
V_AREF
–
V_DDP –
V
Analog reference
ground
V_AGND
–
V_SSP –
V
Alternate analog
reference ground
V_AGNDALT SR V_SSP - –
0.1
2.5¹⁾ V
Internal voltage
reference
V_INTREF SR 1.19 1.23 1.28 V
Connect
internally to V_DDP
Connect
internally to V_SSP
Connect to AN0
in differential
mode, See
Figure 9.
4)
Analog input voltage V_AIN
SR V_AGND –
V_AREF V
–
range
ADC clock
f_ADCI
8
– 16
MHz internal analog
clock
Sample time
t_S
CC (2 + INPCR0.STC) × µs
–
t_ADCI
Conversion time
t_C
CC See Section 3.2.3.1 µs
–
Set-up time between t_SETUP
conversions using
SR –
35 –
µs
2)
internal voltage
reference
Data Sheet
29
V1.2, 2011-03