参数资料
型号: SPC560B50L5C5E0R
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 64 MHz, MICROCONTROLLER, PQFP144
封装: 20 X 20 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-144
文件页数: 55/74页
文件大小: 971K
代理商: SPC560B50L5C5E0R
Electrical characteristics
SPC560Bx, SPC560Cx
Doc ID 14619 Rev 4
Figure 27. Input equivalent circuit (precise channels)
Figure 28. Input equivalent circuit (extended channels)
A second aspect involving the capacitance network shall be considered. Assuming the three
capacitances CF, CP1 and CP2 are initially charged at the source voltage VA (refer to the
equivalent circuit in Figure 27): A charge sharing phenomenon is installed when the
sampling phase is started (A/D switch close).
RF
CF
RS
RL
RSW1
CP2
CS
VDD
Sampling
Source
Filter
Current Limiter
EXTERNAL CIRCUIT
INTERNAL CIRCUIT SCHEME
RS
Source Impedance
RF
Filter Resistance
CF
Filter Capacitance
RL
Current Limiter Resistance
RSW1 Channel Selection Switch Impedance
RAD Sampling Switch Impedance
CP
Pin Capacitance (two contributions, CP1 and CP2)
CS
Sampling Capacitance
CP1
RAD
Channel
Selection
VA
RF
CF
RS
RL
RSW1
CP3
CS
VDD
Sampling
Source
Filter
Current Limiter
EXTERNAL CIRCUIT
INTERNAL CIRCUIT SCHEME
RS
Source Impedance
RF
Filter Resistance
CF
Filter Capacitance
RL
Current Limiter Resistance
RSW Channel Selection Switch Impedance (two contributions RSW1 and RSW2)
RAD Sampling Switch Impedance
CP
Pin Capacitance (three contributions, CP1, CP2 and CP3)
CS
Sampling Capacitance
CP1
RAD
Channel
Selection
VA
CP2
Extended
RSW2
Switch
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