</a>家庭自動化" title="家庭自動化">家庭自動化" title="家庭自動化">家庭自動化,遙控,無線傳感器,遙測等.本文介紹了MAX7034主要特性,方框圖,典型應用電路以及接收器參考設計電路圖,材料清單和PCB布局圖.
The MAX7034 fully integrated low-power CMOS superheterodyne receiver is ideal for receiving amplitudeshift-keyed (ASK) data in the 300MHz to 450MHz frequency range (including the popular 315MHz and 433.92MHz frequencies). The receiver has an RF sensitivity of -114dBm. With few external components and a low-current power-down mode, it is ideal for cost-sensitive and power-sensitive applications typical in the automotive and consumer markets. The MAX7034 consists of a low-noise amplifier (LNA), a fully differential image-rejection mixer, an on-chip phase-locked loop (PLL) with integrated voltage-controlled oscillator (VCO), a 10.7MHz IF limiting amplifier stage with received-signal-strength indicator (RSSI), and analog baseband data-recovery circuitry.
The MAX7034 is available in a 28-pin (9.7mm x 4.4mm) TSSOP package and is specified over the automotive (-40℃ to +125℃) temperature range.
MAX7034主要特性:
_ Optimized for 315MHz or 433.92MHz Band
_ Operates from Single +5.0V Supply
_ Selectable Image-Rejection Center Frequency
_ Selectable x64 or x32 fLO/fXTAL Ratio
_ Low (< 6.7mA) Operating Supply Current
_ < 3.0μA Low-Current Power-Down Mode for Efficient Power Cycling
_ 250μs Startup Time
_ Built-In 44dB RF Image Rejection
_ Excellent Receive Sensitivit
MAX7034應用:
Automotive Remote
Keyless Entry
Security Systems
Garage Door Openers
Home Automation
Remote Controls
Local Telemetry
Wireless Sensors
圖1. MAX7034方框圖
圖2. MAX7034典型應用電路圖
MAX7034接收器參考設計
The MAX7034 receiver reference design (RD) is a self-contained evaluation platform for exercising the product as a tube motor receiver module. This receiver (Rx) board includes a simple power supply, data interface, and an antenna connection, all in a small modular form師factor that allows the receiver to be placed inside of a tubular enclosure. The Rx board was manufactured to be usable as-is. Gerber files are available for simple cut-and-paste of the radio system design.
The MAX7034 315MHz/434MHz amplitude-shift-keyed (ASK) superheterodyne receiver is configured in a near-standard form similar to the typical application circuit illustrated in the MAX7034 data sheet. The system is targeted for 433.92MHz operation and a 1kbps (NRZ) data rate. Four resistor connections are included in the design to allow flexible use of certain pins. Two connections have resistor footprints but are wired as shorts: R5 connects IR_SEL to VDD and R6 connects EN_REG to VDD.
Two other connections are left open (unpopulated): R4 can connect DSP to DATAOUT for hysteresis and R7 can connect DSN to 3V3 for squelch. The module is designed to have a small footprint with minimal connections, to include a pair of pins for antenna/ground connections and a triplet of pins for ground/RX data/power connections. The board uses a 5V power supply.
圖3. MAX7034接收器參考設計A2外形圖
圖4. MAX7034接收器參考設計電路圖
Rx板材料清單:
圖5. MAX7034接收器板PCB布局圖
詳情請見:
http://datasheets.maxim-ic.com/en/ds/MAX7034.pdf
和
http://pdfserv.maxim-ic.com/en/an/REFD5390.pdf
The MAX7034 fully integrated low-power CMOS superheterodyne receiver is ideal for receiving amplitudeshift-keyed (ASK) data in the 300MHz to 450MHz frequency range (including the popular 315MHz and 433.92MHz frequencies). The receiver has an RF sensitivity of -114dBm. With few external components and a low-current power-down mode, it is ideal for cost-sensitive and power-sensitive applications typical in the automotive and consumer markets. The MAX7034 consists of a low-noise amplifier (LNA), a fully differential image-rejection mixer, an on-chip phase-locked loop (PLL) with integrated voltage-controlled oscillator (VCO), a 10.7MHz IF limiting amplifier stage with received-signal-strength indicator (RSSI), and analog baseband data-recovery circuitry.
The MAX7034 is available in a 28-pin (9.7mm x 4.4mm) TSSOP package and is specified over the automotive (-40℃ to +125℃) temperature range.
MAX7034主要特性:
_ Optimized for 315MHz or 433.92MHz Band
_ Operates from Single +5.0V Supply
_ Selectable Image-Rejection Center Frequency
_ Selectable x64 or x32 fLO/fXTAL Ratio
_ Low (< 6.7mA) Operating Supply Current
_ < 3.0μA Low-Current Power-Down Mode for Efficient Power Cycling
_ 250μs Startup Time
_ Built-In 44dB RF Image Rejection
_ Excellent Receive Sensitivit
MAX7034應用:
Automotive Remote
Keyless Entry
Security Systems
Garage Door Openers
Home Automation
Remote Controls
Local Telemetry
Wireless Sensors
圖1. MAX7034方框圖
圖2. MAX7034典型應用電路圖
MAX7034接收器參考設計
The MAX7034 receiver reference design (RD) is a self-contained evaluation platform for exercising the product as a tube motor receiver module. This receiver (Rx) board includes a simple power supply, data interface, and an antenna connection, all in a small modular form師factor that allows the receiver to be placed inside of a tubular enclosure. The Rx board was manufactured to be usable as-is. Gerber files are available for simple cut-and-paste of the radio system design.
The MAX7034 315MHz/434MHz amplitude-shift-keyed (ASK) superheterodyne receiver is configured in a near-standard form similar to the typical application circuit illustrated in the MAX7034 data sheet. The system is targeted for 433.92MHz operation and a 1kbps (NRZ) data rate. Four resistor connections are included in the design to allow flexible use of certain pins. Two connections have resistor footprints but are wired as shorts: R5 connects IR_SEL to VDD and R6 connects EN_REG to VDD.
Two other connections are left open (unpopulated): R4 can connect DSP to DATAOUT for hysteresis and R7 can connect DSN to 3V3 for squelch. The module is designed to have a small footprint with minimal connections, to include a pair of pins for antenna/ground connections and a triplet of pins for ground/RX data/power connections. The board uses a 5V power supply.
圖3. MAX7034接收器參考設計A2外形圖
圖4. MAX7034接收器參考設計電路圖
Rx板材料清單:
圖5. MAX7034接收器板PCB布局圖
詳情請見:
http://datasheets.maxim-ic.com/en/ds/MAX7034.pdf
和
http://pdfserv.maxim-ic.com/en/an/REFD5390.pdf
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