收藏本站
MICRF102
Micrel
MICRF102
8
December 2006
resonant at 5pF, the nominal mid-range value of the MICRF102
output stage varactor.
Using the equation:
 
L
f C
=
1
4
2 2
??/DIV>
If the inductance of the antenna cannot be set at the nominal
value determined by the above equation, a capacitor can
be added in parallel or series with the antenna. In this case,
the varactor internal to the MICRF102 acts to trim the total
capacitance value.
L
ANTENNA
C
VARACTOR
C
P
C
S
Figure 5.
Supply Bypassing
Correct supply bypassing is essential. A 4.7礔 capacitor in
parallel with a 100pF capacitor is recommended.
The MICRF102 is susceptible to supply-line ripple, if supply
regulation is poor or bypassing is inadequate, spurs will be
evident in the transmit spectrum.
PC
VDD
VSS
REFOSC
ASK
MICRF102
L
ASK DATA INPUT
Transformer Output to 50?/DIV>
Impedance Transformation
Network
OFF
ON
RP2
(6.8k)
RP1
(100k)
+5V
Crystal
Z1
Z3
Z2
ANTP
ANTM
STBY
To 50?/DIV>
Termination of
Spectrum Analyzer
Figure 6. Application Test Circuit For Speci cation Veri cation
Transmit Power
The transmit power speci ed in this datasheet is normalized
to a load of 50Ohm. The antenna ef ciency will determine
the actual radiated power. Good antenna design will yield
transmit power in the range of 67dB礦/m to 80dB礦/m at
3 meters.
The PC pin on the MICRF102 is used to set the transmit
power. The differential voltage on the output of the PA (power
ampli er) is proportional to the voltage at the PC pin.
With more than 0.35V on the PC pin the output ampli er
becomes current limited. At this point, further increase in
the PC pin voltage will not increase the RF output power in
the antenna pins. Low power consumption is achieved by
decreasing the voltage in the PC pin, also reducing the RF
output power and maximum range.
Output Blanking
When the device is  rst powered up, or after a momentary
loss of power, the output is automatically blanked (disabled).
This feature ensures RF transmission only occurs under con-
trolled conditions when the synthesizer is fully operational,
plus preventing unintentional transmission at an undesired
frequency. Output blanking is key to guaranteeing compliance
with UHF regulations by ensuring transmission only occurs
in the intended frequency band.
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
MICRF112YMM TR IC XMITTER UHF ASK/FSK 10-MSOP
MICRF405YML TR TRANSMITTER ASK/FSK 24-MLF
MTX-102-433DR-B MODULE TRANSMITTER 433MHZ 18DIP
MTX-103-915DR-B MODULE TRANSMITTER 915MHZ 18DIP
MTX-405-433DR-B MODULE TRANSMITTER 433MHZ 24DIP
N50P105 IC MODULE MINI JOYSTICK SMD
OCB350L187Z BOARD CALIBR CIRCUIT OPB350L187
OMB.242.08F21 OMNI OUTDOOR ANTENNA
相关代理商/技术参数
MICRF103 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:QwikRadio UHF ASK Transmitter
MICRF103BM 功能描述:IC ASK TRANSMITTER UHF 8SOIC RoHS:否 类别:RF/IF 和 RFID >> RF 发射器 系列:- 标准包装:4,000 系列:- 频率:310MHz ~ 440MHz 应用:- 调制或协议:UHF，ASK 数据传输率 - 最大:20 kBaud 功率 - 输出:1dBm ~ 5dBm 电流 - 传输:10mA 数据接口:PCB，表面贴装 天线连接器:PCB，表面贴装 存储容量:- 特点:- 电源电压:2.2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:16-LSSOP（0.154"，3.90mm 宽） 包装:带卷 (TR)
MICRF103BM TR 功能描述:IC TRANSMITTER ASK UHF 8-SOIC RoHS:否 类别:RF/IF 和 RFID >> RF 发射器 系列:- 标准包装:4,000 系列:- 频率:310MHz ~ 440MHz 应用:- 调制或协议:UHF，ASK 数据传输率 - 最大:20 kBaud 功率 - 输出:1dBm ~ 5dBm 电流 - 传输:10mA 数据接口:PCB，表面贴装 天线连接器:PCB，表面贴装 存储容量:- 特点:- 电源电压:2.2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:16-LSSOP（0.154"，3.90mm 宽） 包装:带卷 (TR)
MICRF103YM 功能描述:IC ASK TRANSMITTER UHF 8SOIC RoHS:是 类别:RF/IF 和 RFID >> RF 发射器 系列:- 标准包装:4,000 系列:- 频率:310MHz ~ 440MHz 应用:- 调制或协议:UHF，ASK 数据传输率 - 最大:20 kBaud 功率 - 输出:1dBm ~ 5dBm 电流 - 传输:10mA 数据接口:PCB，表面贴装 天线连接器:PCB，表面贴装 存储容量:- 特点:- 电源电压:2.2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:16-LSSOP（0.154"，3.90mm 宽） 包装:带卷 (TR)
MICRF103YM TR 功能描述:IC TRANSMITTER ASK UHF 8-SOIC RoHS:是 类别:RF/IF 和 RFID >> RF 发射器 系列:- 标准包装:4,000 系列:- 频率:310MHz ~ 440MHz 应用:- 调制或协议:UHF，ASK 数据传输率 - 最大:20 kBaud 功率 - 输出:1dBm ~ 5dBm 电流 - 传输:10mA 数据接口:PCB，表面贴装 天线连接器:PCB，表面贴装 存储容量:- 特点:- 电源电压:2.2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:16-LSSOP（0.154"，3.90mm 宽） 包装:带卷 (TR)
MICRF104 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.8V, QwikRadio⑩ UHF ASK Transmitter
MICRF104BM 功能描述:IC ASK TRANSMITTER UHF 14SOIC RoHS:否 类别:RF/IF 和 RFID >> RF 发射器 系列:- 标准包装:4,000 系列:- 频率:310MHz ~ 440MHz 应用:- 调制或协议:UHF，ASK 数据传输率 - 最大:20 kBaud 功率 - 输出:1dBm ~ 5dBm 电流 - 传输:10mA 数据接口:PCB，表面贴装 天线连接器:PCB，表面贴装 存储容量:- 特点:- 电源电压:2.2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:16-LSSOP（0.154"，3.90mm 宽） 包装:带卷 (TR)
MICRF104BM TR 功能描述:IC ASK TRANSMITTER UHF 14SOIC RoHS:否 类别:RF/IF 和 RFID >> RF 发射器 系列:- 标准包装:4,000 系列:- 频率:310MHz ~ 440MHz 应用:- 调制或协议:UHF，ASK 数据传输率 - 最大:20 kBaud 功率 - 输出:1dBm ~ 5dBm 电流 - 传输:10mA 数据接口:PCB，表面贴装 天线连接器:PCB，表面贴装 存储容量:- 特点:- 电源电压:2.2 V ~ 4 V 工作温度:-40°C ~ 85°C 封装/外壳:16-LSSOP（0.154"，3.90mm 宽） 包装:带卷 (TR)