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参数资料
| 型号： | MC33493MOD434 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 18/22页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR MC33493 TX |
| 标准包装： | 1 |
| 类型： | 发射器 |
| 适用于相关产品： | MC33493 434MHz 射频模块 |
| 所含物品： | 模块和其他硬件 |
Recommendations for FSK Modulation
Figure 15. Application PCB Layout for FSK Modulation, Serial Configuration, 434 MHz Frequency Band
Table 9 gives the measured FSK deviations respective to C3 and C4 capacitor values for three deviations. Crystal reference is
NDK NX8045GB/CSJ S1-40125-8050-12.
Table 9. Crystal Pulling Capacitor Values vs Carrier Frequency Total Deviation -1-
Carrier frequency
(MHz)
434
868
Carrier frequency total
deviation (kHz)
45
70
100
90
140
200
C3 capacitor (pF)
4.7
2.2
1
4.7
2.2
1
C4 capacitor (pF)
6.8
10
15
6.8
10
15
Recommended
R_off value (k Ω )
10
—
22
10
—
22
Another crystal reference, NDK NX1255GA (see Table 7 ), is enabled to reach higher deviation as mentioned on Table 10 .
These results are due to the higher crystal motional capacitor.
Table 10. Crystal Pulling Capacitor Values vs Carrier Frequency Total Deviation -2-
Carrier frequency
(MHz)
434
868
Carrier frequency total
deviation (kHz)
150
300
C3 capacitor value
(pF)
1
1
C4 capacitor value
(pF)
27
27
Recommended
R_off value (k Ω )
—
—
14
Recommendations for FSK Modulation
FSK deviation is function of total load capacitance presented to the crystal. This load capacitance is constituted by various
contributors:
?
?
?
?
the crystal characteristic, especially its static capacitance
the external load capacitors (C3, C4 as defined in Figure 14 and Table 9 )
the device internal capacitance of pins XTAL0, XTAL1, CFSK
the PCB track capacitance
The schematic given in Figure 16 shows a typical FSK application using serial capacitor configuration, where device pads and
PCB track capacitances are mentioned.
PLL Tuned UHF Transmitter for Data Transfer Applications, Rev. 1.7
18
Freescale Semiconductor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33493MOD434EV | 功能描述:开发板和工具包 - 无线 MC33493 (TANGO3) RF EVAL RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| MC33493MOD868EV | 功能描述:开发板和工具包 - 无线 MC33493 (TANGO3) RF EVAL RoHS:否 制造商:Arduino 产品:Evaluation Boards 工具用于评估:AT32UC3L 核心:AVR32 频率: 接口类型:USB 工作电源电压:5 V |
| MC3350-041-91 | 制造商:SPC Multicomp 功能描述:ROCKER SWITCH DPDT CTR OFF 制造商:SPC Multicomp 功能描述:ROCKER SWITCH, DPDT, CTR OFF 制造商:SPC Multicomp 功能描述:SWITCH, ROCKER, DPDT, 15A, 250V, BLACK; Contact Configuration:DPDT; Switch Operation:On-Off-On; Contact Current Max:10A; Contact Voltage AC Nom:250V; Contact Voltage DC Nom:250V; Switch Mounting:Panel; Actuator / Cap Color:Black ;RoHS Compliant: Yes |
| MC3350-041-91 | 制造商:SPC Multicomp 功能描述:SWITCH ROCKER DPDT CTR OFF |
| MC33501SNT1 | 功能描述:运算放大器 - 运放 1-7V Single Rail to RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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