saf-xc822t-1fri Infineon Technologies Corporation, saf-xc822t-1fri Datasheet - Page 31

• Manufacturer Part Number: saf-xc822t-1fri
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Infineon Technologies Corporation

Preliminary
Table 10
Parameter
Switched
capacitance at an
analog input
Total capacitance
at an analog input
Input resistance of
an analog input
1) 1.2 V at
2) TUE is tested at
3) Not subject to production test, verified by design/characterization
4) If a reduced positive reference voltage is used, TUE will increase. If the positive reference is reduced by a
5) The sampling capacity of the conversion C-Network is pre-charged to
Figure 9
Data Sheet
factor of K, the TUE will increased by 1/K. Example:K = 0.8, 1/K = 1.25; 1.25 X TUE = 2.5 LSB10
the C-Network. Because of the parasitic elements, the voltage measured at ANx is lower than
V
V
1 .2VREF
1.2VGND
V
DDP
= 3.0 V.
ADC Characteristics (Operating Conditions apply;
Differential like measurement with internal 1.2V voltage reference,
and CH0 gnd.
va_altgnd
V
va_altref
DDP
= 5.0 V.
Symbol
C
C
R
AIN
AINSW
AINT
generation
handling
Interrupt
request
control
result
CC –
CC –
CC –
Min.
Limit Values
ADC kernel
26
Typ.
2
–
1.5
conversion
converter
control
AD
Max.
3
12
2
V
AREF
Unit Test Conditions /
pF
pF
kΩ
/2 before connecting the input to
Electrical Parameters
Remarks
3)5)
3)5)
3)
V
DDP
AIN CH3/7
AIN CH1
AIN CH0
= 5 V)
XC822/824
V0.1, 2010-02
V
AREF
/2.