Austriamicrosystems AS3930单路低功耗ASK接收方案
Austriamicrosystems公司的 AS3930是单路低功耗ASK接收器,能产生LF载波频率在110-150kHz间的叫醒信号.集成的相关器能用来检测可编程的16位叫醒图,叫醒支持1秒到2小时, 叫醒灵敏度100μVRMS,工作电压2.4-3.6V,主要用在RF标签,实时定位系统,工作人员识别,接入控制和无线传感器.本文介绍AS3930主要特性, 方框图,有晶振,无晶振和外接时钟源的AS3930应用电路.
Active RFID tags, real-time location systems, operator identification, access control, and wireless sensors
AS3930 Single Channel Low Frequency Wakeup Receiver
The AS3930 is a single-channel low power ASK receiver that is able to generate a wakeup upon detection of a data signal which uses a LF carrier frequency between 110 - 150 kHz. The integrated correlator can be used for detection of a programmable 16-bit wakeup pattern.
The AS3930 provides a digital RSSI value, it supports a programmable data rate and Manchester decoding with clock recovery. The AS3930 offers a real-time clock (RTC), which is either derived from a crystal oscillator or the internal RC oscillator.
The programmable features of AS3930 enable to optimize its settings for achieving a longer distance while retaining a reliable wakeup generation. The sensitivity level of AS3930 can be adjusted in presence of a strong field or in noisy environments.
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