收藏本站
Micrel
Mod_la
MICRF506BML/YML
Mod_lb
Mod_filter off
Mod_filter on
Mod_la > Mod_lb
Figure 23. Modulator Waveform with and without
f MOD_CLK =
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
deviations). In addition, the attenuator will improve
the resolution in the modulator.
Filtering
Mod_F=0 disables the modulator filter and Mod_F=7
gives most filtering. Figure 22 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:
f XCO
Refclk_K × 2 (7 ? Mod_clkS )
Mod_Aa
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 :
f XCO :
Single sided frequency deviation
[Hz]
Crystal oscillator frequency [Hz]
Figure 22. Two Different Modulator Attenuator
Settings
The effect of the attenuator is given by:
f RF :
Refclk_K:
Mod_clkS:
Center frequency [Hz]
6 bit divider, values between 1
and 63
Modulator clock setting, values
f DEVIATION ×
1
1 + Mod_A
f MOD_CLK :
between 0 and 7
Modulator clock
derived from
frequency,
the crystal
frequency,
Refclk_K
and
d _ d _ A M M
Figure 22 shows two A waveforms b with different
attenuator setting: < . If Mod_A
Mod_I:
Mod_clkS
Modulator
current
setting,
is increased, the frequency deviation is lowered and
values between 0 and 31
vice versa.
Mod_A:
Modulator
attenuator
setting,
values between 0 and 15
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:
July 2006
27
C1:
C2:
-2.17 ? 10 10
82
M9999-092904
+1 408-944-0800
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MICRF507YML TR TXRX FSK LOW PWR W/AMP 32MLF
MICRF600DEV1 KIT DEV RADIOWIRE 902-928MHZ
MK01-C SENSOR REED SPST-NO SMD
MK01-H SENSOR REED SPDT-CHANGE SMD
MK02/0-1A66-500W SENSOR REED SPST-NO
MK02/6-0 SENSOR REED PCB 24MM T/H
MK03-1C90C-500W SENSOR REED SPDT CYLINDER
MK05-1A66C-500W SENSOR REED SPST-NO SCREW MOUNT
相关代理商/技术参数
MICRF506DEV1 制造商:Micrel Inc 功能描述:KIT MICRF506 EVALUATION
MICRF506YML 制造商:Micrel Inc 功能描述:410/450MHZ ITRANSCEIVER SMD MLF32 制造商:Micrel Inc 功能描述:410/450MHZ ITRANSCEIVER, SMD, MLF32 制造商:Micrel Inc 功能描述:MICRF506 Series 410-450 MHz ISM Band FSK Transceiver - MLF-32 制造商:Micrel Inc 功能描述:410/450MHZ ITRANSCEIVER, SMD, MLF32; Frequency Min:410MHz; Frequency Max:450MHz; Modulation Type:FSK; Sensitivity dBm:-113dBm; Data Rate:200Kbps; Supply Voltage Min:2V; Supply Voltage Max:2.5V; RF IC Case Style:MLF; No. of Pins:32; ;RoHS Compliant: Yes
MICRF506YML TR 功能描述:射频收发器 410MHz to 470MHz, 2.0V to 2.5V, Low-Power 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
MICRF506YMLTR 制造商:Micrel 功能描述:433MHz ISM Band Transceiver
MICRF506YML-TR 功能描述:IC RF TxRx Only General ISM < 1GHz 410MHz ~ 450MHz 32-VFQFN Exposed Pad, 32-MLF? 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 类型:仅限 TxRx 射频系列/标准:通用 ISM < 1GHz 协议:- 调制:FSK 频率:410MHz ~ 450MHz 数据速率（最大值）:200kbps 功率 - 输出:11dBm 灵敏度:-113dBm 存储容量:- 串行接口:SPI GPIO:- 电压 - 电源:2 V ~ 2.5 V 电流 - 接收:8mA ~ 12mA 电流 - 传输:8mA ~ 21.5mA 工作温度:-40°C ~ 85°C 封装/外壳:32-VFQFN 裸露焊盘，32-MLF? 标准包装:1
MICRF507 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:470MHz to 510MHz Low-Power FSK Transceiver with 10dBm Power Amplifier
MICRF507YML TR 功能描述:射频收发器 470MHz to 510MHz, 2.0V to 2.5V, Low-Power 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
MICRF507YMLTR 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:470MHz to 510MHz Low-Power FSK Transceiver with +10dBm Power Amplifier