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| 型号： | MICRF008YM |
| 厂商： | Micrel Inc |
| 文件页数： | 6/13页 |
| 文件大小： | 0K |
| 描述： | IC RECEIVER 300-440MHZ 8-SOIC |
| 标准包装： | 95 |
| 系列： | QwikRadio® |
| 频率： | 300MHz ~ 440MHz |
| 灵敏度： | -95dBm |
| 数据传输率 - 最大： | 4.8 kbps |
| 调制或协议： | OOK |
| 应用： | 车库门开启器 |
| 电流 - 接收： | 7mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 特点： | 自动调谐 |
| 电源电压： | 4.75 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 571 (CN2011-ZH PDF) |
| 其它名称： | 576-1961-5 MICRF008YM-ND |
Micrel, Inc.
Functional Diagram
UHF Downconverter
AGC
Control
MICRF008
CAGC
ANT
RF
Amp
t RF
t LO
t IF
mboer
IF
Amp
1MHz
IF
Amp
Peak
Detector
VCC
VSS
SEL0
Synthesizer
Control
Logic
Switched-Cap
Resistor
R BC
Programmable
Low-Pass
Filter
DO
REFOSC
Ceramic
Resonator
Reference
Oscillator
Reference and Control
OOK Demodulator
CTH
Figure 1. MICRF008 Block Diagram
Functional Description
The entire block diagram illustrates the basic structure of
the MICRF008YM. It is made of three sub-blocks, which
are the UHF Downconverter, the OOK Demodulator, and
the Reference and Control. Also shown in the figure are
two capacitors (CTH, and CAGC) and the reference
frequency device, usually a ceramic resonator. With the
exception of a supply decoupling capacitor and the
matching network on the antenna pin, these are all the
external components needed with the MICRF008YM to
make a complete UHF receiver. There is one control
input, the SEL0 pin. The purpose is to set the
demodulator filter bandwidth of either 2.4kHz or 4.8kHz,
and is set high or low according to the minimum pulse
width in the demodulated signal. The input is CMOS
compatible, and is pulled-up internally in the IC.
Receiver Operation
The MICRF008YM is a superheterodyne receiver
working in sweep mode. It is capable of data rates up to
9.6kbaud NRZ or 4.8kbaud Manchester encoded. The
MICRF008YM RF center frequency is controlled by a
completely integrated PLL/VCO frequency synthesizer
with frequency set by a ceramic resonator. The actual
swept bandwidth is approximately 3% of the RF carrier
frequency. It makes an ideal part to work with LC-based
transmitters or other types of transmitters that are not
precise in nature and vary their frequency with time. In
sweep mode the LO frequency (local oscillator) is varied
in a rate much higher than the data signal, which results
in down-conversion of approximately 3% of the carrier
frequency present at the antenna pin. The low level RF
signal is amplified by the RF amp section and
downconverted by the mixer to the IF frequency which is
amplified and filtered internally in the device and further
amplified for the peak detector. The peak detector will
detect the IF and further filtering is accomplished in the
programmable low-pass filter. The detected/filtered
signal is compared with the DC value of the
demodulated signal in the data-slicer and a digital output
is provided from the DO pin
Data Slicing Level
Extraction of the DC value of the demodulated signal for
purposes of logic-level data slicing is accomplished by
an external capacitor CTH and the on-chip switched-
capacitor resistor RSC, indicated in the block diagram.
The effective resistance of RSC scales inversely
August 2008
6
M9999-080108
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相关代理商/技术参数 |
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| MICRF008YM TR | 功能描述:射频接收器 300-440MHz Low-Cost Receiver, Sweep-Mode( Lead Free) RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel |
| MICRF009 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:QwikRadio Low-Power UHF Receiver |
| MICRF009BM | 功能描述:IC RECEIVER UHF LOW POWER 16SOIC RoHS:否 类别:RF/IF 和 RFID >> RF 接收器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 09/Jan/2012 标准包装:50 系列:* 频率:850MHz ~ 2.175GHz 灵敏度:- 数据传输率 - 最大:- 调制或协议:- 应用:* 电流 - 接收:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 特点:- 电源电压:4.75 V ~ 5.25 V 工作温度:0°C ~ 85°C 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| MICRF009BM TR | 功能描述:IC RCVR UHF 300-440MHZ 16-SOIC RoHS:否 类别:RF/IF 和 RFID >> RF 接收器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 09/Jan/2012 标准包装:50 系列:* 频率:850MHz ~ 2.175GHz 灵敏度:- 数据传输率 - 最大:- 调制或协议:- 应用:* 电流 - 接收:* 数据接口:PCB，表面贴装 存储容量:- 天线连接器:PCB，表面贴装 特点:- 电源电压:4.75 V ~ 5.25 V 工作温度:0°C ~ 85°C 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（6x6） 包装:托盘 |
| MICRF009YM | 功能描述:射频接收器 300-440MHz High Sensitivity Receiver( Lead Free) RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel |
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