參數(shù)資料
型號(hào)： SAK-TC1765T-L40EB
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 32-BIT, MROM, 40 MHz, MICROCONTROLLER, PBGA260
封裝： PLASTIC, LBGA-260
文件頁(yè)數(shù)： 69/88頁(yè)
文件大?。?/td> 1274K
代理商： SAK-TC1765T-L40EB
TC1765
Data Sheet
67
V1.2, 2002-12
Preliminary
Figure 22
Equivalent Circuitry of Analog Input
Note: This equivalent circuitry for an analog input is also valid for the reference inputs
VAREF and VAGND.
9) The overload coupling factor (k
A) defines the worst case relation of an overload condition (IOV) at one pin to
the resulting leakage current (
Ileak) into an adjacent pin: |Ileak| = kA × |IOV|.
Thus under overload conditions an additional error leakage voltage (
VAEL) will be induced onto an adjacent
analog input pin due to the resistance of the analog input source (
RAIN). That means VAEL = RAIN × |Ileak|.
See also section 7.1.6 “Error Through Overload Conditions” in the TC1765 Peripheral Units User’s Manual for
further explanations.
10) This represents an equivalent switched capacitance. This capacitance is not switched to the reference voltage
at once. Instead of this smaller capacitances are successively switched to the reference voltage. Alternatively,
the redistributed charge could be specified.
11) The switched capacitance at the analog voltage input must be charged within the sampling time. Alternatively,
the redistributed charge could be specified.
M C S 04879
R
AIN , So u rce
=
V
AIN
C
AIN , Blo ck
R
AIN , O n
C
AIN T O T - C AIN S W
C
AIN S W
A /D C o nv erte r
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