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[原创] Maxim MAX7037超低功耗RF ISM收发器解决方案

关键词:无线通信 ISM收发器 FSK ASK 消费类电子 MAX7037

时间:2018-01-31 11:04:38       作者:Maxim       来源:中电网

Maxim公司的MAX7037是小于1GHz的超低功耗高性能四波段ISM(315/433/868/915~930MHz)多路收发器,集成了8051微控制器(MCU),闪存和传感器接口.工作电压2.1V到 5.5V,最大TX输出功率(RLOAD=400Ω)为10dBm,接收灵敏度(FFSK,BW=150kHz)为 -100dBm,FFSK/FMSK/ASK调制,主要用在超低功耗传感器网络,智能仪表,建筑物自动化和短距离通信.本文介绍了MAX7037主要优势和特性,框图和应用电路,以及评估板MAX7037 EVK主要特性,电路图,材料清单和PCB设计图.

Sub-1GHz, Ultra-Low-Power, RF ISM Transceiver for Consumer/Industrial Applications The MAX7037 is an ultra-low-power, high-performancequad-band multichannel transceiver with integrated 8051microcontroller, flash memory, and sensor interface.

The MAX7037 runs from a minimum supply voltageof only 2.1V, extending battery life and enabling it tocope with different sources of energy, like solar cells, electromechanical or thermos-electrical energy. Hardwareimplementedtransmit-and-receive routines, in combinationwith a microcontroller, enable a high-efficiency transceiversystem for wireless fail-safe multiband/multichannelcommunication with advanced FSK and ASK protocolfeatures. Sleep modes allow easy implementation of lowpowerapplications with fast reaction times.

MAX7037主要优势和特性:

●● Ultra-Low-Power Consumption for Battery-BasedOperation
• Current Consumption TX (POUT = +6dBm, FSK):16mA
• Current Consumption RX (FSK): 22mA
• Current Consumption Deep Sleep Mode (WatchdogTimer and PRAM Active): 100nA
• Supply Voltage Range: 2.1V to 5.5V
• Integrated Ultra-Low-Power On/Off VoltageThreshold Detectors
●● Worldwide Usable frequency Band Coverage
• ISM Band Frequency Coverage:315/433/868/915~930MHz
●● Fractional-N LO Generation For MultichannelOperation
• RF Synthesizer Resolution: 244Hz/488Hz
●● FFSK/FMSK/ASK Modulation for OptimumCompatibility with Various Communication Standards
• Gross Data Rates: Up To 125Kbit/s
• ASK with Programmable Transition Shape forSpectral Tuning
●● Fully Integrated RF, TX, and RX Front-End forMinimum External Components
• Maximum TX Output Power (RLOAD = 400Ω):+10dBm
• RX Sensitivity (FFSK, BW = 150kHz): -100dBm
●● Mixed-Signal Sensor Interface with Analog I/OThrough ADC/DAC and On-Chip Buffers (ContactFactory for Future Support)
• Integrated 9-Bit Sigma Delta ADC for Applications
• Integrated 8-Bit DAC
• 8 Mixed-Signal I/Os with Versatile Switching Matrix;Up to 18 Digital I/Os
●● Wristwatch Crystal-Based Real-Time Clock (ContactFactory for Future Support)
• Wristwatch Crystal Oscillator Integrated: 32768Hz

MAX7037应用:

●● Ultra-Low-Power Sensor Networks
●● Smart Metering
●● Building Automation
●● Short-Range Communication

图1.MAX7037框图

图2.MAX7037应用电路图

评估板MAX7037 EVK

The MAX7037 evaluation kit (EV kit) is a fully assembledand tested PCB to evaluate the MAX7037 sub-1GHz,Ultra-Low-Power, RF ISM transceiver. The EV kit is connectedto the PC through a Siam Kitty board. The EV kit getspower from the Siam Kitty board and runs from a minimumsupply voltage of only 2.1V.

A particular EV kit will only work at a specific carrierfrequency. The frequencies supported are: 315MHz,434MHz, 868MHz, 902MHz, 915MHz, and 928MHz. EV kitsare shipped configured for 315MHz operation. It is necessaryto change the RF matching components to configurean EV kit to work at one of the other frequencies.

评估板MAX7037 EVK主要特性:

●● Easy Evaluation of the MAX7037
●● Proven PCB Layout
●● Fully Assembled and Tested
评估板MAX7037 EVK包括:
●● Assembled circuit board including MAX7037.
●● Assembled Siam Kitty Board.
●● 14 POS Mini D Ribbon (MDR) Cable
●● A Male-to-Micro B Male USB Cable

图3.评估板MAX7037 EVK外形图

图4.评估板MAX7037 EVK电路图(1)

图5.评估板MAX7037 EVK电路图(2)

图6.评估板MAX7037 EVK电路图(3)
评估板MAX7037 EVK材料清单:


图7.评估板MAX7037 EVK PCB设计图(顶层)

图8.评估板MAX7037 EVK PCB设计图(底层)
详情请见:
https://datasheets.maximintegrated.com/en/ds/MAX7037.pdf
https://datasheets.maximintegrated.com/en/ds/MAX7037EVKIT.pdf
MAX7037.pdf
MAX7037EVKIT.pdf

 

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