收藏本站
MICRF501
Micrel
MICRF501
300MHz to 600MHz RadioWire? RF Transceiver
Final
General Description
The MICRF501 is a single chip tranceiver intended for ISM
(Industrial, Scientific and Medical) and SRD (Short Range
Device) frequency bands from 300MHz to 600MHz 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 or the
crystal oscillator. The synthesizer has two different N, M and
A frequency dividers. FSK modulation can also be imple-
mented 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
RadioWire?
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
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 range: 300MHz to 600MHz
Modulation: FSK
RF output power: 12dBm
Sensitivity (19.2k bauds, BER=10 -3 ): –105dBm
Maximum data rate: 128k bauds
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
Applications
? Telemetry
? Remote metering
? Wireless controller
? Wireless data repeaters
? Remote control systems
? Wireless modem
? Wireless security system
Ordering Information
dynamic range. The cut-off frequency of the Sallen-Key RC
filter can be programmed to four different frequencies: 10kHz,
Part Number
MICRF501BLQ
Ambient Temp. Range
–40°C to +85°C
Package
44-Lead LQFP
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.
RadioWire is a trademark of Micrel, Inc.
Micrel, Inc. ? 1849 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 944-0970 ? http://www.micrel.com
March 2003
1
MICRF501
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
MICRF505DEV1 KIT DEV RADIOWIRE 850-950MHZ
MICRF506DEV1 EVAL BOARD EXPERIMENTAL MICRF506
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
相关代理商/技术参数
MICRF501EVAL1 功能描述:EVAL BOARD EXPERIMENTAL MICRF501 RoHS:否 类别:RF/IF 和 RFID >> RF 评估和开发套件，板 系列:RadioWire® 标准包装:1 系列:- 类型:GPS 接收器 频率:1575MHz 适用于相关产品:- 已供物品:模块 其它名称:SER3796
MICRF505 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:868MHz and 915MHz ISM Band Transceiver
MICRF505_07 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:850MHz and 950MHz ISM Band Transceiver
MICRF505BML 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述:
MICRF505BML TR 功能描述:TXRX ISM 868-915MHZ 32-MLF RoHS:否 类别:RF/IF 和 RFID >> RF 收发器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:30 系列:- 频率:4.9GHz ~ 5.9GHz 数据传输率 - 最大:54Mbps 调制或协议:* 应用:* 功率 - 输出:-3dBm 灵敏度:- 电源电压:2.7 V ~ 3.6 V 电流 - 接收:* 电流 - 传输:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 工作温度:-25°C ~ 85°C 封装/外壳:68-TQFN 裸露焊盘 包装:管件
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