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參數(shù)資料
| 型號： | MICRF102BM |
| 廠商： | MICREL INC |
| 元件分類： | 消費家電 |
| 英文描述： | QwikRadio UHF ASK Transmitter |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO8 |
| 封裝： | SOIC-8 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 61K |
| 代理商： | MICRF102BM |
MICRF102
Micrel
MICRF102
8
September 2002
In the simplest implementation, the inductance of the loop
antenna should be chosen such that the nominal value is
resonant at 5pF, the nominal mid-range value of the MICRF102
output stage varactor.
Using the equation:
L
=
1
2 2
4
π
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 4.
Supply Bypassing
Correct supply bypassing is essential. A 4.7uF 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
‰
ImpedanNetwork
OFF
ON
RP2
RP1
+5V
Crystal
Z1
Z3
Z2
ANTP
ANTM
STBY
‰
STerTo 50
Figure 5. Application Test Circuit For Specification Verification
Transmit Power
The transmit power specified in this datasheet is normalized
to a 50Ohm load. The antenna efficiency will determine the
actual radiated power. Good antenna design will yield trans-
mit power in the range of 67dB
μ
V/m to 80dB
μ
V/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
amplifier) is proportional to the voltage at the PC pin.
With more than 0.35V on the PC pin the output amplifier
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 de-
creasing the voltage in the PC pin, also reducing the RF
output power and maximum range.
Output Blanking
When the device is first 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,
preventing unintentional transmission at an undesired fre-
quency. Output blanking is key to guaranteeing compliance
with UHF regulations by ensuring transmission only occurs in
the intended frequency band.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MICRF102BM TR | 功能描述:IC TRANSMITTER ASK UHF 8-SOIC RoHS:否 類別:RF/IF 和 RFID >> RF 發(fā)射器 系列:- 標準包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應用:- 調制或協(xié)議:UHF，ASK 數(shù)據(jù)傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲容量:- 特點:- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
| MICRF102YM | 功能描述:射頻發(fā)射器 300-460MHz, 5V Transmitter( Lead Free) RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
| MICRF102YM TR | 功能描述:射頻發(fā)射器 300-460MHz, 5V Transmitter( Lead Free) RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
| MICRF103 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:QwikRadio UHF ASK Transmitter |
| MICRF103BM | 功能描述:IC ASK TRANSMITTER UHF 8SOIC RoHS:否 類別:RF/IF 和 RFID >> RF 發(fā)射器 系列:- 標準包裝:4,000 系列:- 頻率:310MHz ~ 440MHz 應用:- 調制或協(xié)議:UHF，ASK 數(shù)據(jù)傳輸率 - 最大:20 kBaud 功率 - 輸出:1dBm ~ 5dBm 電流 - 傳輸:10mA 數(shù)據(jù)接口:PCB，表面貼裝 天線連接器:PCB，表面貼裝 存儲容量:- 特點:- 電源電壓:2.2 V ~ 4 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-LSSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
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