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参数资料
| 型号： | MICRF505BML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 27/42页 |
| 文件大小： | 0K |
| 描述： | TXRX ISM 868-915MHZ 32-MLF |
| 标准包装： | 1,000 |
| 频率： | 850MHz ~ 950MHz |
| 数据传输率 - 最大： | 200kbps |
| 调制或协议： | FSK |
| 应用： | 遥测，无线控制器 |
| 功率 - 输出： | 10dBm |
| 灵敏度： | -111dBm |
| 电源电压： | 2.3 V ~ 5.5 V |
| 电流 - 接收： | 13.5mA |
| 电流 - 传输： | 28mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-VFQFN 裸露焊盘，32-MLF? |
| 包装： | 带卷 (TR) |
| 其它名称： | MICRF505BMLTR MICRF505BMLTR-ND |
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Micrel
Mod_la
MICRF505BML/YML
Mod_lb
Mod_filter off
Mod_filter on
Mod_la > Mod_lb
Figure 23. Modulator Waveform with and without
Figure 21. Two Different Modulator Current Settings
Modulator Attenuator
A third way to set the deviation is by programming
the modulator attenuator, Mod_A2..Mod_A0, the last
being LSB. The purpose of the attenuator is to allow
small deviations when the bit rate is small and/or the
BT is small (these settings will give a relatively slow
modulator clock, and therefore long rise- and fall
times, which in turn results in large frequency
Filtering
Mod_F=0 disables the modulator filter and Mod_F=7
gives most filtering. Figure 23 shows a waveform
with and without the filter.
Calculation of the Frequency Deviation
The parameters influencing the frequency deviation
can be summarized in the following equations:
deviations). In addition, the attenuator will improve
the resolution of the modulator.
Mod_Aa
f MOD_CLK =
f XCO
Refclk_K ? 2 (7-Mod_clkS)
Mod_Ab
f DEV =
Mod_I
f MOD_CLK
?
1
1 + Mod_A
? ( C 1 + C 2 ? f RF )
Mod_Ab > Mod_Ab
Where:
f DEV :
Single sided frequency deviation
[Hz].
Figure 22. Two Different Modulator Attenuator
Settings
The effect of the attenuator is given by:
f XCO :
f RF :
Refclk_K:
Crystal oscillator frequency [Hz].
Center frequency [Hz].
6 bit divider, values between 1
and 63.
f DEVIATION
∝
1
1 + Mod_A
Mod_clkS:
f MOD_CLK :
Modulator clock setting, values
between 0 and 7.
Modulator clock frequency,
derived from the crystal
Figure 22 shows two waveforms with different
attenuator setting: Mod _ Aa < Mod _ Ab . If Mod_A is
increased, the frequency deviation is lowered and
vice versa.
Modulator Filter
To reduce the high-frequency components in the
generated waveform, a filter with programmable cut-
off frequency can be enabled. This is done using
Mod_F2..Mod_F0, the least one being LSB. The
Mod_F should be set according to the formula:
150 × 10 3
MOD _ F =
BitRate
October 2006
27
Mod_I:
Mod_A:
C1:
C2:
frequency, Refclk_K and
Mod_clkS.
Modulator current setting,
values between 0 and 31.
Modulator attenuator setting,
values between 0 and 15.
? 4.42 × 10 10
72
M9999-103106
+1 408-944-0800
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MICRF505DEV1 | 功能描述:射频开发工具 MICRF505 Evaluation Kit - For experimental use only RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| MICRF505DEV1 | 制造商:Micrel Inc 功能描述:KIT MICRF505 EVALUATION |
| MICRF505L | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:850MHz and 950MHz ISM Band Transceiver |
| MICRF505LYML | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MICRF505LYML TR | 功能描述:射频收发器 850MHz to 950MHz, 2.25V to 5.5V FSK Transceiver with +10dBm Power Amplifier RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray |
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