参数资料
型号: MPC5607BF0AMLU6
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 64 MHz, MICROCONTROLLER, PQFP176
封装: 24 X 24 MM, ROHS COMPLIANT, LQFP-176
文件页数: 85/110页
文件大小: 907K
代理商: MPC5607BF0AMLU6
MPC5607B Microcontroller Data Sheet, Rev. 6
Electrical characteristics
Freescale Semiconductor
76
Figure 18. 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 reported in Figure 17): A charge sharing phenomenon
is installed when the sampling phase is started (A/D switch close).
Figure 19. Transient behavior during sampling phase
In particular two different transient periods can be distinguished:
1. A first and quick charge transfer from the internal capacitance CP1 and CP2 to the sampling capacitance CS occurs (CS
is supposed initially completely discharged): considering a worst case (since the time constant in reality would be
faster) in which CP2 is reported in parallel to CP1 (call CP = CP1 + CP2), the two capacitances CP and CS are in series,
and the time constant is
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
VA
VA1
VA2
t
TS
VCS
Voltage Transient on CS
V <0.5 LSB
1
2
1 < (RSW + RAD) CS << tS
2 = RL (CS + CP1 + CP2)
相关PDF资料
PDF描述
MPC5607BF0VMG6 32-BIT, FLASH, 64 MHz, MICROCONTROLLER, PBGA208
MPC5646CCF0MLU1 32-BIT, FLASH, 120 MHz, MICROCONTROLLER, PQFP176
MPC5646CF0CMJ8R 32-BIT, FLASH, 80 MHz, MICROCONTROLLER, PBGA256
MC56F8255MLD 16-BIT, FLASH, 60 MHz, MICROCONTROLLER, PQFP44
MC9S12XEP100CAAR 32-BIT, FLASH, 50 MHz, RISC MICROCONTROLLER, PQFP80
相关代理商/技术参数
参数描述
MPC5607CECLLR 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Microcontroller
MPC5607CECLQR 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Microcontroller
MPC5607CECLUR 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Microcontroller
MPC5607CEMLLR 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Microcontroller
MPC5607CEMLQR 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Microcontroller