原标题：Linear LTP5901-IPM高精度无线温度传感器解决方案

　　Linear公司的LTP5901-IPM/LTP5902-IPM是具片式天线的SmartMesh PCB微尘模块,是IEEE 802.15.4e PCB模块解决方案Eterna系列产品的IP微尘产品,具有高度集成低功耗以及ARM Cortex-M3 32位处理器的特性,在大多数RF环境中网络可靠消息大于99.999%,RF模块符合USA, 加拿大,欧盟,日本,台湾,韩国,印度,澳大利亚和新西兰等国标准,路由器电流小于50uA,主要用在Dust网络如楼宇自动化,数据中心能耗管理,可再生能源,远程监视,交通系统和物流操作等.本文介绍了SmartMesh IP™网络特性,LTP5901-IPM/LTP5902-IPM主要特性和Eterna系列框图与应用框图,以及带太阳能电池寿命扩展器的高精度无线温度传感器DC2126A主要特性,电路图,材料清单和PCB设计文件.

　　SmartMesh IP Node 2.4GHz802.15.4e Wireless Mote ModuleSmartMesh IP™ wireless sensor networks are self managing,low power Internet Protocol (IP) networks builtfrom wireless nodes called motes. The LTP5901-IPM/LTP5902-IPM is the IP mote product in the Eterna®* familyof IEEE 802.15.4e printed circuit board assembly solutions,featuring a highly-integrated, low power radio design byDust Networks® as well as an ARM Cortex-M3 32-bitmicroprocessor running Dust’s embedded SmartMesh IPnetworking software. Both the LTP5901-IPM (with chipantenna), at 24mm × 42mm, and the LTP5902-IPM (withMMCX connector), at 24mm × 37mm, are designed forsurface mount assembly.

　　With Dust’s time-synchronized SmartMesh IP networks,all motes in the network may route, source or terminatedata, while providing many years of battery poweredoperation. The SmartMesh IP software provided with theLTP5901-IPM/LTP5902-IPM is fully tested and validated,and is readily configured via a software Application ProgrammingInterface.SmartMesh IP motes deliver a highly flexible networkwith proven reliability and low power performance in aneasy-to-integrate platform.

　　SmartMesh IP wireless sensor networks are self managing, low power Internet Protocol (IP) networks built from wireless nodes called motes. The LTP™5901-IPM is the IP mote product in the Eterna® family of IEEE 802.15.4e printed circuit board assembly solutions, featuring a highly-integrated, low power radio design by Dust Networks® as well as an ARM Cortex-M3 32-bit microprocessor running Dust’s embedded SmartMesh IP networking software.The LTP5901-IPM includes an onboard chip antenna and comes with modular RF certifications. Also available are the LTC5800-IPM Mote-on-Chip and the LTP5902-IPM module which includes an MMCX antenna connector.

　　With Dust’s time-synchronized SmartMesh IP networks, all motes in the network may route, source or terminate data, while providing many years of battery powered operation. The SmartMesh IP software provided with the LTP5901-IPM is fully tested and validated, and is readily configured via a software Application Programming Interface.

　　SmartMesh IP motes deliver a highly flexible network with proven reliability and low power performance in an easy-to-integrate platform.

　　SmartMesh IP™网络特性:

　　Complete Radio Transceiver, Embedded Processor,and Networking Software for Forming a Self-HealingMesh Network

　　SmartMesh® Networks Incorporate:

　　Time Synchronized Network-Wide Scheduling

　　Per Transmission Frequency Hopping

　　Redundant Spatially Diverse Topologies

　　Network-Wide Reliability and Power Optimization

　　NIST Certified Security

　　SmartMesh Networks Deliver:

　　>99.999% Network Reliability Achieved in theMost Challenging RF Environments

　　Sub 50μA Routing Nodes

　　Compliant to 6LoWPAN Internet Protocol (IP) andIEEE 802.15.4e Standards

　　LTP5901-IPM/LTP5902-IPM主要特性:

　　Industry-Leading Low Power Radio Technology With:

　　4.5mA to Receive a Packet

　　5.4mA to Transmit at 0dBm

　　9.7mA to Transmit at 8dBm

　　RF Modular Certification Include USA, Canada, EU,Japan, Taiwan, Korea, India, Australia and New Zealand

　　PCB Assembly with Chip Antenna (LTP5901-IPM) orwith MMCX Antenna Connector (LTP5902-IPM). QFNVersion (LTC®5800-IPM) Available

　　图1.Eterna系列框图

　　图2.LTP5901-IPM典型应用框图

　　带太阳能电池寿命扩展器的高精度无线温度传感器DC2126A

　　The DC2126A is a high-accuracy wireless temperaturesensor that can be powered from ambient light. It is builtusing various integrated circuits from Linear Technology.A 24-bit delta-sigma ADC reads a thermistor biased froma precision voltage reference. A SmartMesh IPWirelessradio module provides the wireless mesh connectivity andcommunicates the temperature to a central access point(manager). A switching power supply harvests energyfrom the built-in solar panel, and automatically switchesover to the internal battery when no ambient light is available.

　　图3.无线温度传感器DC2126A外形图