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| 型号： | MICRF007YM |
| 厂商： | Micrel Inc |
| 文件页数： | 6/13页 |
| 文件大小： | 0K |
| 描述： | IC RECEIVER UHF LOW POWER 8SOIC |
| 标准包装： | 95 |
| 系列： | QwikRadio® |
| 频率： | 300MHz ~ 440MHz |
| 灵敏度： | -96dBm |
| 数据传输率 - 最大： | 2.1 kbps |
| 调制或协议： | ASK，OOK |
| 应用： | RKE |
| 电流 - 接收： | 3mA |
| 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： | 576-1334 |
MICRF007
Functional Diagram
CAGC
Micrel
C AGC
ANT
RF
Amp
f RX
f LO
f IF
IF
Amp
5th Order
Band-Pass Filter
430kHz
IF
Amp
AGC
Control
Peak
Detector
2nd Order
Programmable
Low-Pass Filter
Switched-
Capacitor
Resistor
R SC
Compa-
rator
DO
VDD
VSS
Synthesizer
UHF Downconverter
OOK Demodulator
CTH
C TH
SHUT
Control
Logic
REFOSC
Cystal
or
Ceramic
Resonator
f T
MICRF007
Reference
Oscillator
Reference and Control
MICRF007 Block Diagram
Applications Information and Functional
Description
Refer to the functional diagram. Three sections of the IC are
identi?ed: UHF Down-converter, OOK Demodulator and Ref-
erence and Control. Also shown are two capacitors (CTH,
CAGC) and one timing component (Y1), usually a crystal.
With the exception of a supply decoupling capacitor, these
are the only external components needed by the MICRF007
to assemble a complete UHF receiver.
For optimal performance, MICRF007 input impedance must
be matched to the antenna impedance. The matching network
will add an additional two or three components.
There is one control input, SHUT pin. The SHUT function is
used to enable the receiver. This input is CMOS compatible,
and is pulled-up on the IC.
Roll-off response of the IF Band-Pass Filter is 5th order, while
the demodulator data ?lter exhibits a 2nd order response.
The MICRF007 is a standard super-heterodyne receiver with
a narrow IF ?lter bandwidth of 700kHz. It is less susceptible to
interfering RF signals. The MICRF007 RF center frequency is
controlled by an integrated PLL/VCO frequency synthesizer,
which is locked to the reference oscillator frequency, typically
set by a crystal. A tight tolerance transmitter such as SAW or
crystal-based transmitters must be used for the system.
The MICRF007 has a fully integrated base-band demodulator
?lter. The ?lter has a ?xed 2.5kHz bandwidth and exhibits a
2nd order response. This ?lter limits the receiver raw data
rate to 3.2Kbps NRZ.
Design Steps
The following steps are the basic design steps for using
the MICRF007 receiver:
1. Select the reference oscillator
2. Select the C TH capacitor
3. Select the C AGC capacitor
Step 1: Selecting Reference Oscillator
All timing and tuning operations on the MICRF007 are de-
rived from the internal Colpitts reference oscillator. Timing
and tuning is controlled through the REFOSC pin in one of
two ways:
1. Connect a crystal.
2. Drive this pin with an external timing signal.
The speci?c reference frequency required is related to the
system transmit frequency.
Crystal Selection
Care should be taken to ensure low ESR crystals are se-
lected. “Application Hint 35” provides additional information
and recommended sources for crystals.
When a crystal is used, the minimum voltage is 300mV PP . If
using an externally applied signal, it should be AC-coupled
and limited to the operating range of 0.1V PP to 1.5V PP .
Selecting Reference Oscillator Frequency f T
As with any super-heterodyne receiver, the difference between
the internal local oscillator (LO) frequency f LO and
the incoming transmit frequency f TX should equal the IF
center frequency. Equation 1 may be used to compute the
M9999-021705
6
February 17, 2005
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| MICRF007YM TR | 功能描述:射频接收器 300-440MHz Receiver, 1.2kbps, 1.7mA With Shutdown( 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 |
| MICRF008 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:QwikRadio Sweep-Mode Receiver |
| MICRF008_11 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:QwikRadio Sweep-Mode Receiver |
| MICRF008BM | 功能描述:IC RECEIVER 300-440MHZ 8-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 |
| MICRF008BM TR | 功能描述:IC RECEIVER 300-440MHZ 8-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 |
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