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應用PT4301來做接受端功能模塊，具有較高的頻率穩定度,接收靈敏度靈敏度達-114dBm,接收距離是普通同類模塊的2-3倍;有合理的接收帶寬,抗力特強，適應各種環境使用;傳輸速率可達20kbps;輸出為數據cmos電平信號,可直接至標準或cpu解碼,頻率為315m~433.92m,適合與同頻發射模塊及遙控手柄配套,用于各種遙控器,報警器及單片機短距離數據傳輸.
應用范圍：各種低速率數字信號的接收;工業遙控,遙測,遙感;防盜報警器信號接收,各種家用電器的遙控等.------------------------
DESCRIPTION
The PT4301 is a very low power and highly sensitive single chip OOK/ASK super-heterodyne receiver for
the 315MHz and 434MHz frequency bands that offers a high level of integration and requires only a few external components. The PT4301 consists of a low-noise amplifier (LNA), an image-rejection mixer, an on-chip phase-locked loop (PLL) with integrated voltage-controlled oscillator (VCO) and loop filter, a 10.7MHz intermediate frequency (IF) limiting amplifier stage with received-signal-strength indicator (RSSI), and analog basebａnd data recovery circuitry (data filter, peak detector, and data slicer). The PT4301 also implements a discrete one-step automatic gain control (AGC) that reduces the LNA gain by 20dB when the RF input signal is greater than -47dBm. The PT4301 is available in a 24-pin SSOP package. FEATURES
? Low current consumption (5mA fully active mode at 315MHz)
? 2.4V to 5.5V supply voltage operation range
? Optimized for 315MHz or 434MHz ISM Band
? On-chip image-rejection function
? High dynamic range with on-chip AGC
? Low power down mode current (<1μA)
? High sensitivity of -114dBm (315MHz, 2Kb/s AM 99% square-wave modulation)
? 24-pin SSOP package APPLICATIONS
? Remote keyless entry (RKE) systems
? Remote control systems including garage door and gate openers
? Alarm and security systems
? Wireless sensors 主要應用到：汽車摩托車防盜器、車庫門、電動門窗、閘門、工業控制、遙控燈、遙控開關、通訊以及安防、物聯網、智能家居等相關無線領域