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| 型號： | TRK-MPC5604P |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 71/104頁 |
| 文件大小： | 0K |
| 描述： | 5604P TTK BD |
| 設(shè)計資源： | TRK-MPC5604P Component List TRK-MPC5604P Schematic |
| 標準包裝： | 1 |
| 系列： | MPC56xx |
| 類型： | MCU |
| 適用于相關(guān)產(chǎn)品： | MPC5604P |
| 所含物品： | 板，線纜，CD，DVD |
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MPC5604P Microcontroller Data Sheet, Rev. 8
Freescale
69
In fact a current sink contributor is represented by the charge sharing effects with the sampling capacitance: CS and CP2 being
substantially two switched capacitances, with a frequency equal to the ADC conversion rate, it can be seen as a resistive path
to ground. For instance, assuming a conversion rate of 1 MHz, with CS+CP2 equal to 3 pF, a resistance of 330 k is obtained
(REQ = 1 / (fc × (CS+CP2)), where fc represents the conversion rate at the considered channel). To minimize the error induced
by the voltage partitioning between this resistance (sampled voltage on CS+CP2) and the sum of RS + RF, the external circuit
must be designed to respect the Equation 4:
Eqn. 4
Equation 4 generates a constraint for external network design, in particular on resistive path.
Figure 15. Input equivalent circuit
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 15): A charge sharing phenomenon
is installed when the sampling phase is started (A/D switch closed).
VA
RS RF
+
REQ
---------------------
1
2
---LSB
RF
CF
RS
RL
RSW1
CP2
CS
VDD
Sampling
Source
Filter
Current Limiter
EXTERNAL CIRCUIT
INTERNAL CIRCUIT SCHEME
CP1
RAD
Channel
Selection
VA
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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| TRK-MPC5606B | 制造商:Freescale Semiconductor 功能描述:MPC5606B 144PIN REV 2.1 - Boxed Product (Development Kits) 制造商:Freescale Semiconductor 功能描述:STARTERTRAK DEV BOARD MPC5606B 制造商:Freescale Semiconductor 功能描述:MPC560 QORIVVA STARTER TRAK 制造商:Freescale Semiconductor 功能描述:PRIMARY PLATFORM ((NW)) 制造商:Freescale Semiconductor 功能描述:MPC560, QORIVVA, STARTER TRAK, DEV KIT 制造商:Freescale Semiconductor 功能描述:MPC5606B 144pin 制造商:Freescale Semiconductor 功能描述:EVAL KIT, MPC560B STARTERTRAK AUTO BODY ELECT; Silicon Manufacturer:Freescale; Core Architecture:Power Architecture; Core Sub-Architecture:Power Architecture; Silicon Core Number:MPC5xxx; Silicon Family Name:Qorivva |
| TRK-MPC5606B | 制造商:Freescale Semiconductor 功能描述:PRIMARY PLATFORM ((NW)) |
| TRK-MPC5634M | 功能描述:開發(fā)板和工具包 - 其他處理器 TRAK 5634M 144pn R2.1 RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| TRK-USB-MPC5602P | 功能描述:開發(fā)板和工具包 - 其他處理器 STRAKMiniUSB RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| TRK-USB-MPC5604B | 功能描述:開發(fā)板和工具包 - 其他處理器 MiniUSB MPC5604B RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
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