Maxim MAX4147X290MHz－960MHz ASK／FSK接收器解决方案

Maxim公司的MAX41473/MAX41474是290MHz到960MHz高性能低功耗 ASK/FSK接收器.接收器采用单个低成本16MHz晶体可配置成三个受欢迎的亚GHz波段:287MHz到320MHz,425MHz到480MHz和860MHz到960MHz.接收器具有极好的灵敏度,允许RF输入时的输入信号高达0dBm.器件集成了IF滤波器,仅有几个外接元件,具有低工作电流(9mA)和降功耗电流(10nA),非常适合于低成本和功耗敏感的应用.芯片还包括低噪音放大器(LNA),全差分图像抑制混合器,集成了压控振荡器(VCO)的片上锁相环(PLL),接收信号强度指示器(RSSI)和数字解调器.器件具有33dB校准图相抑制,LNA输入具有±2.5kV HBM ESD 保护和±4kV.高达200kbps数据速率(NRZ),工作电压1.8V-3.6V,工作温度-40C 到+105C,4mm x 4mm 12引脚TQFN封装.主要用在案家庭自动化和安全,建筑物接入控制,车库门开启(GDO),无钥匙遥控器(RKE), 胎压监测系统(TPMS)和餐厅传呼机.本文介绍了MAX4147X主要优势和特性,框图和功能框图,以及评估板MAX4147X EVK主要特性和优势,电路图,材料清单和PCB设计图.

The MAX41473/MAX41474 are high-performance, lowpowerreceivers ideal for amplitude shift-keyed (ASK) andfrequency shift-keyed (FSK) data. The receivers can beconfigured for three popular sub-1GHz bands while usinga single low-cost 16MHz crystal: 287MHz to 320MHz,425MHz to 480MHz, and 860MHz to 960MHz.

The MAX41473/MAX41474 are capable of ASK or FSKreception, and are also fully programmable through theI2C interface. In addition to the programmable option, theMAX41473/MAX41474 provide a preset option where noprogramming is required for defined configurations. Thedesign allows for single wire operation to an external microcontroller.

The receiver has excellent RF sensitivity and allows inputsignals up to 0dBm of power at the RF input. With an integratedIF filter, a few external components, and low operating/

power-down currents, the MAX41473/MAX41474receivers are ideal for cost- and power-sensitive applications.

The chips also include a low-noise amplifier (LNA),fully differential image-rejection mixer, on-chip phaselockedloop (PLL) with integrated voltage-controlled oscillator(VCO), received si...