Aaustriamicrosystems AS3900低功耗FSK收发方案
Aaustriamicrosystems公司的AS3900是低功耗27MHz FSK收发器,适用于电池工作的短距离范围设备(SRD)的应用.数据速率高达210kbps,器件可配置成收发器,发送器或接收器,工作频段为27.12MHz的ISM.输出功率可调整到0, +5, +10 dBm,并集成了基于OOK的叫醒系统. AS3900的工作电压2.2V-3.6V,接收功耗3.8mA,接收灵敏度-85dBm, 10dBm功率时的发送功耗为4.9mA,关断电流最大为700nA,主要用在设备间短距离数据交换,数据传输,家庭和工业网络控制以及交互式遥控.本文介绍了低功耗星形网络收发器AS3900主要特性, 方框图以及典型应用框图.
Low Power 27MHz FSK transceiver with protocol for star network
The AS3900 is a low power FSK transceiver ideal for battery-operated short range devices (SRD) applications in which a limited amount of data (data rate up to 210 kbit/s) need to be transferred. The device can be configured as transceiver, transmitter only or receiver only system and operates in one channel in the worldwide ISM band at 27 MHz.
The frequency of the external oscillator determines the operating frequency. Use of 27 MHz is in particular advantageous for communication in close proximity of the human body due to the low absorption of the signal by tissue because of the low specific absorption rate at 27 MHz. The device incorporates a serial digital interface (SDI), which enables bidirectional communication with external system components.
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