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参数资料
| 型号： | SPC560B50L3C5E0R |
| 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, PQFP100 |
| 封装： | 14 X 14 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, LQFP-100 |
| 文件页数： | 58/74页 |
| 文件大小： | 971K |
| 代理商： | SPC560B50L3C5E0R |
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Electrical characteristics
SPC560Bx, SPC560Cx
Doc ID 14619 Rev 4
Equation 9
Of course, RL shall be sized also according to the current limitation constraints, in
combination with RS (source impedance) and RF (filter resistance). Being CF
definitively bigger than CP1, CP2 and CS, then the final voltage VA2 (at the end of the
(charge balance assuming now CS already charged at VA1):
Equation 10
The two transients above are not influenced by the voltage source that, due to the presence
of the RFCF filter, is not able to provide the extra charge to compensate the voltage drop on
CS with respect to the ideal source VA; the time constant RFCF of the filter is very high with
respect to the sampling time (TS). The filter is typically designed to act as anti-aliasing.
Figure 30. Spectral representation of input signal
Calling f0 the bandwidth of the source signal (and as a consequence the cut-off frequency of
the anti-aliasing filter, fF), according to the Nyquist theorem the conversion rate fC must be at
least 2f0; it means that the constant time of the filter is greater than or at least equal to twice
the conversion period (TC). Again the conversion period TC is longer than the sampling time
TS, which is just a portion of it, even when fixed channel continuous conversion mode is
selected (fastest conversion rate at a specific channel): in conclusion it is evident that the
time constant of the filter RFCF is definitively much higher than the sampling time TS, so the
charge level on CS cannot be modified by the analog signal source during the time in which
the sampling switch is closed.
The considerations above lead to impose new constraints on the external circuit, to reduce
the accuracy error due to the voltage drop on CS; from the two charge balance equations
10
τ
2
10 R
L
C
S
C
P1
C
P2
++
()
=T
S
<
V
A2
C
S
C
P1
C
P2
C
F
++
+
()
V
A
C
F
V
A1
+C
P1
C
P2
+C
S
+
()
=
f0
f
Analog source bandwidth (VA)
f0
f
Sampled signal spectrum (fC = conversion rate)
fC
f
Anti-aliasing filter (fF = RC filter pole)
fF
2 f0 < fC (Nyquist)
fF = f0 (anti-aliasing filtering condition)
TC < 2 RFCF (conversion rate vs. filter pole)
Noise
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| SPC560B50L3C5E0Y | 32-BIT, FLASH, 64 MHz, MICROCONTROLLER, PQFP100 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPC560B50L3C6E0X | 功能描述:32位微控制器 - MCU 32-BIT Embedded MCU 64 MHz 512kB Body RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| SPC560B50L3C6E0Y | 功能描述:32位微控制器 - MCU 32-BIT Embedded MCU 64 MHz 512kB Body RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| SPC560B50L5C6E0X | 功能描述:32位微控制器 - MCU 32-BIT Embedded MCU 64 MHz 512kB Body RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| SPC560B50L5C6E0Y | 功能描述:32位微控制器 - MCU 32-BIT Embedded MCU 64 MHz 512kB Body RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| SPC560B50SK | 功能描述:开发板和工具包 - ARM Raisonance Kit 512K Starter Rflasher 64 RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
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