saa-xc886clm Infineon Technologies Corporation, saa-xc886clm Datasheet - Page 117

• Manufacturer Part Number: saa-xc886clm
• Description: 8-bit Single Chip Microcontroller
• Manufacturer: Infineon Technologies Corporation

Table 40
Parameter
Switched
capacitance at the
reference voltage
input
Switched
capacitance at the
analog voltage
inputs
Input resistance of
the reference input
Input resistance of
the selected analog
channel
1) Not subjected to production test, verified by design/characterization
2) TUE is tested at
3) An overload current (
4) This represents an equivalent switched capacitance. This capacitance is not switched to the reference voltage
5) The sampling capacity of the conversion C-Network is pre-charged to
Data Sheet
current adds to the respective pin’s leakage current (
current and is defined by the overload coupling factor
compared to the polarity of the overload current that produces it. The total current through a pin is |
+ (|
at once. Instead of this, smaller capacitances are successively switched to the reference voltage.
the C-Network. Because of the parasitic elements, the voltage measured at ANx is lower than
I
OV
| ×
K
OV
). The additional error current may distort the input voltage on analog inputs.
ADC Characteristics (Operating Conditions apply;
V
AREF
I
OV
= 5.0 V,
Symbol
C
C
R
R
) through a pin injects a certain error current (
AREF
AIN
AREFSW
AINSW
V
AGND
CC –
CC –
CC –
CC –
= 0 V,
min.
V
DDP
Limit Values
= 5.0 V.
110
I
typ .
10
5
1
1
OZ
K
). The amount of error current depends on the overload
OV
. The polarity of the injected error current is inverse
max.
20
7
2
1.5
V
I
Unit Test Conditions/
pF
pF
kΩ
kΩ
INJ
AREF
) into the adjacent pins. This error
/2 before connecting the input to
Electrical Parameters
Remarks
1)4)
1)5)
1)
1)
SAA-XC886CLM
V
DDP
= 5V Range)
V1.0, 2009-09
V
AREF
I
TOT
/2.
| = |
I
OZ1
|