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参数资料
| 型号： | MC56F8247VLH |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, FLASH, 60 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 10 X 10 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, PLASTIC, MS-026BCD, LQFP-64 |
| 文件页数： | 66/88页 |
| 文件大小： | 4050K |
| 代理商： | MC56F8247VLH |
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Specifications
MC56F825x/MC56F824x Digital Signal Controller, Rev. 3
Freescale Semiconductor
69
7.25.1
Equivalent Circuit for ADC Inputs
Figure 31 illustrates the ADC input circuit during sample and hold. S1 and S2 are always opened/closed at non-overlapping
phases and operate at the ADC clock frequency. Equivalent input impedance, when the input is selected, is as follows:
(2 x k / ADCClockRate x Cgain ) + 100 ohms + 125 ohms
Eqn. 1
where k =
1 for first sample
6 for subsequent samples
and Cgain is as described in note 4 below.
1. Parasitic capacitance due to package, pin-to-pin, and pin-to-package base coupling: 1.8 pF
Input impedance
XIN
—See Figure 31
—Ohms
Signal-to-noise ratio
SNR
—
59
dB
Total Harmonic Distortion
THD
—
64
dB
Spurious Free Dynamic Range
SFDR
—
65
dB
Signal-to-noise plus distortion
SINAD
—
59
dB
Effective Number Of Bits
ENOB
—
9.5
Bits
1 All measurements were made at VDD = 3.3V, VREFH = 3.3V, and VREFL = ground
2 Includes power-up of ADC and VREF
3 ADC clock cycles
4 Speed register setting must be 00 for ADC clock ≤ 5 MHz, 01 for 5 MHz < ADC clock ≤ 12 MHz, and 10 for ADC clock > 12 MHz
5 INL and DNL measured from VIN = VREFL to VIN = VREFH
6 LSB = Least Significant Bit = 0.806 mV at x1 gain
7 Pin groups are detailed following Table 17.
8 The current that can be injected or sourced from an unselected ADC signal input without affecting the performance of the ADC
9 ADC PGA gain is x1
Table 41. ADC Parameters1 (continued)
Parameter
Symbol
Min
Typ
Max
Unit
1
2
3
Analog input
S1
S2
C1
S/H
C1: Single Ended Mode
2XC1: Differential Mode
(VREFHx - VREFLx ) / 2
125-ohm ESD
resisto
r
S2
S1
Channel Mux
equivalent resistance
100 ohms
C1: Single Ended Mode
2XC1: Differential Mode
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相关代理商/技术参数 |
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|---|---|
| MC56F8247VLHR | 制造商:Freescale Semiconductor 功能描述:MICRO CONTROLLER |
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| MC56F8255VLD | 功能描述:数字信号处理器和控制器 - DSP, DSC DSC 44 LQFP 64K FL RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT |
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