austriamicrosystems announces best-in-class 3-channel low-frequency wake-up receiver with 15 - 150kHz range & automatic antenna tuning capability

Featuring a wide receive frequency range -- 15 to 150 kHz -- the AS3933 offers flexibility to designers for a wide range of applications, including active RFID, high-value asset tracking, real-time location systems, operator identification, wireless sensor networks and access control or remote keyless entry. The AS3933 provides a digital RSSI (received signal strength indicator) value for each active channel, and supports a programmable data rate and Manchester decoding with clock recovery. It also includes an internal clock generator which is derived from either a crystal oscillator or the internal RC oscillator, and is the first such device to provide a built-in automatic antenna tuner that tunes the antenna to the desired carrier frequency. All of these features are commonly requested by customers to lower their BOM, without compromising performance.



The programmable features of the AS3933 allow optimizing settings for longer operating distance while retaining reliable “wake-up” generation. The sensitivity level of the AS3933 can be adjusted in the presence of a strong RF field or in noisy environments. Antenna tuning is greatly simplified, as the automatic tuning feature ensures perfect matching to the desired carrier frequency.



Johnsy Varghese, Marketing Manager Wireless at austriamicrosystems, stated, “With increased sensitivity, wider input frequency range, double the number of correlation bits and automatic antenna tuning capability built in, the AS3933 allows austriamicrosystems to continue to lead the industry for low-frequency wake-up receivers. Despite these advances, the AS3933 still maintains its very low operating current of 2.7 uA and programming flexibility which make it suitable for a wide array of low-power systems.”



The AS3933 operates with a 3.0 V power supply and is specified over the -40 to +85ºC temperature range. The device is available in 16-pin TSSOP and 16-pin QFN (4 mm x 4 mm) packages.