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参数资料
| 型号： | MICRF022YM-FS48 |
| 厂商： | Micrel Inc |
| 文件页数： | 7/17页 |
| 文件大小： | 0K |
| 描述： | IC RECEIVER ASK 300-440MHZ 8SOIC |
| 标准包装： | 95 |
| 频率： | 300MHz ~ 440MHz |
| 灵敏度： | -97dBm |
| 数据传输率 - 最大： | 10 kbps |
| 调制或协议： | ASK，OOK |
| 应用： | RKE |
| 电流 - 接收： | 2.2mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 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： | 576-2421 MICRF022YM-FS48-ND |
Micrel, Inc.
Functional Diagram
CAGC
MICRF002/RF022
C AGC
5th Order
Band-Pass Filter
AGC
Control
2nd Order
Programmable
Low-Pass Filter
Switched-
Capacitor
Resistor
ANT
RF
Amp
f RX
f LO
f IF
IF
Amp
430kHz
IF
Amp
Peak
Detector
R SC
Compa-
rator
DO
VDD
CTH
VSS
Synthesizer
UHF Downconverter
OOK Demodulator
C TH
SEL0
SEL1
SWEN
Control
Logic
Resettable
Counter
WAKEB
SHUT
REFOSC
Cystal
or
Ceramic
Resonator
f T
MICRF002
Reference
Oscillator
Reference and Control
Wakeup
Figure 1. MICRF002 Block Diagram
Application Information and Functional
Description
Refer to Figure 1 “MICRF002 Block Diagram”. Identified in
the block diagram are the four sections of the IC: UHF
Downconverter, OOK Demodulator, Reference and
Control, and Wakeup. Also shown in the figure are two
capacitors (CTH, CAGC) and one timing component,
usually a crystal or ceramic resonator. With the exception
of a supply decoupling capacitor, and antenna impedance
matching network, these are the only external components
needed by the MICRF002 to assemble a complete UHF
receiver.
For optimal performance is highly recommended that the
MICRF002 is impedance matched to the antenna, the
matching network will add an additional two or three
components.
Four control inputs are shown in the block diagram: SEL0,
SEL1, SWEN, and SHUT. Using these logic inputs, the
user can control the operating mode and selectable
features of the IC. These inputs are CMOS compatible, and
are internally pulled-up. IF Bandpass Filter Roll-off
response of the IF Filter is 5th order, while the demodulator
data filter exhibits a 2 nd order response.
Design Steps
The following steps are the basic design steps for using the
MICRF002 receiver:
1. Select the operating mode (sweep or fixed)
2. Select the reference oscillator
3. Select the C TH capacitor
4. Select the C AGC capacitor
5. Select the demodulator filter bandwidth
Step 1: Selecting the Operating Mode
Fixed-Mode Operation
For applications where the transmit frequency is accurately
set (that is, applications where a SAW or crystal-based
transmitter is used) the MICRF002 may be configured as a
standard superheterodyne receiver (fixed mode). In fixed-
mode operation the RF bandwidth is narrower making the
receiver less susceptible to interfering signals. Fixed mode
is selected by connecting SWEN to ground.
Sweep-Mode Operation
When used in conjunction with low-cost L-C transmitters
the MICRF002 should be configured in sweep-mode. In
sweep-mode, while the topology is still superheterodyne,
the LO (local oscillator) is swept over a range of
frequencies at rates greater than the data rate. This
technique effectively increases the RF bandwidth of the
July 2008
7
M9999-070808
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相关代理商/技术参数 |
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| MICRF022YM-FS48 TR | 功能描述:射频接收器 300-440MHz RF Receiver 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 |
| MICRF022YM-SW48 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:300-440MHz QwikRadio? ASK Receiver |
| MICRF033BM | 制造商:Micrel Inc 功能描述:RF Receiver 5V 8-Pin SOIC 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MICRF102 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:QwikRadio UHF ASK Transmitter |
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