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參數資料
| 型號： | MICRF500 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 700MHz to 1.1GHz RadioWire RF Transceiver |
| 中文描述： | 700MHz至1.1GHz的射頻收發器RadioWire |
| 文件頁數： | 1/18頁 |
| 文件大小： | 143K |
| 代理商： | MICRF500 |
March 2003
1
MICRF500
MICRF500
Micrel
MICRF500
700MHz to 1.1GHz RadioWire RF Transceiver
Final
General Description
The MICRF500 is a single chip UHF transceiver designed for
spread spectrum communication (FHSS) intended for ISM
(Industrial, Scientific and Medical) and SRD (Short Range
Device) frequency bands from 700MHz to 1100MHz with
FSK data rates up to 128k baud.
The transmitter consists of a PLL frequency synthesizer and
a power amplifier. The frequency synthesizer consists of a
voltage-controlled oscillator (VCO), a crystal oscillator, dual-
modulus prescaler, programmable frequency dividers and a
phase-detector. The loop filter is external for flexibility and
can be a simple passive circuit. The VCO is a Colpitts
oscillator which requires an external resonator and varactor.
FSK modulation can be applied externally to the VCO. The
synthesizer has two different N, M and A frequency dividers.
FSK modulation can also be implemented by switching
between these dividers (max. 2400bps). The lengths of the N
and M and A registers are 12, 10 and 6 bits respectively. For
all types of FSK modulation, data is entered at the DATAIXO
pin (see application circuit). The output power of the power
amplifier can be programmed to eight levels. A lock detect
circuit detects when the PLL is in lock.
In receive mode the PLL synthesizer generates the local
oscillator (LO) signal. The N, M and A values that give the LO
frequency are stored in the N0, M0 and A0 registers. The
receiver is a zero intermediate frequency (IF) type in order to
make channel filtering possible with low-power integrated
low-pass filters. The receiver consists of a low-noise amplifier
(LNA) that drives a quadrature mixer pair. The mixer outputs
feed two identical signal channels in phase quadrature. Each
channel includes a preamplifier, a third order Sallen-Key RC
low pass filter that protects the following gyrator filter from
strong adjacent channel signals and finally, a limiter. The
main channel filter is a gyrator capacitor implementation of a
seven-pole elliptic low pass filter. The elliptic filter minimizes
the total capacitance required for a given selectivity and
dynamic range. The cut-off frequency of the Sallen-Key RC
filter can be programmed to four different frequencies: 10kHz,
30kHz, 60kHz and 200kHz. An external resistor adjusts the
cut-off frequency of the gyrator filter. The demodulator de-
modulates the I and Q channel outputs and produces a digital
data output. It detects the relative phase of the I and the Q
channel signal. If the I channel signal lags the Q channel, the
FSK tone frequency lies above the LO frequency (data ‘1’). If
the I channel leads the Q channel, the FSK tone lies below the
LO frequency (data ‘0’). The output of the receiver is available
on the DATAIXO pin. A RSSI (Receive Signal Strength
Indicator) circuit indicates the received signal level.
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
A two pin serial interface is used to program the circuit.
External components are necessary for RF input and output
impedance matching and decoupling of power. Other exter-
nal components are the VCO resonator circuit with varactor,
crystal, feedback capacitors and components for FSK modu-
lation with the VCO, loop filter, bias resistors for the power
amplifier and gyrator filters. A T/R switch can be implemented
with 2-pin diodes. This gives maximum input sensitivity and
transmit output power.
Features
Frequency range: 700MHz to 1100MHz
Modulation: FSK
RF output power: 10dBm
Sensitivity (19.2k bauds, BER=10
-3
): –104dBm
Maximum data rate: 128k bauds
Applications
Telemetry
Remote metering
Wireless controller
Wireless data repeaters
Remote control systems
Wireless modem
Wireless security system
Ordering Information
Part Number
MICRF500BLQ
Ambient Temp. Range
–40
°
C to +85
°
C
Package
44-Lead LQFP
RadioWire is a trademark of Micrel, Inc.
RadioWire
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MICRF500BLQ | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:700MHz to 1.1GHz RadioWire RF Transceiver |
| MICRF500BLQ TR | 功能描述:射頻接收器 700-1000MHz, 3.0V, FSK, FH Transceiver RoHS:否 制造商:Skyworks Solutions, Inc. 類型:GPS Receiver 封裝 / 箱體:QFN-24 工作頻率:4.092 MHz 工作電源電壓:3.3 V 封裝:Reel |
| MICRF500BLQTR | 功能描述:TXRX UHF 700-1100MHZ 44-LQFP RoHS:否 類別:RF/IF 和 RFID >> RF 收發器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:30 系列:- 頻率:4.9GHz ~ 5.9GHz 數據傳輸率 - 最大:54Mbps 調制或協議:* 應用:* 功率 - 輸出:-3dBm 靈敏度:- 電源電壓:2.7 V ~ 3.6 V 電流 - 接收:* 電流 - 傳輸:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 工作溫度:-25°C ~ 85°C 封裝/外殼:68-TQFN 裸露焊盤 包裝:管件 |
| MICRF500EVAL1 | 功能描述:射頻開發工具 MICRF500 Evaluation Kit - For experimental use only RoHS:否 制造商:Taiyo Yuden 產品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
| MICRF501 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:300MHz to 600MHz RadioWire⑩ RF Transceiver |
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