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Fully integrated AS3940 transceiver simplifies design and extends battery life
Published:  02 September, 2010

austriamicrosystems has unveiled the AS3940, a first fully integrated 2.4 GHz multi-channel FSK (frequency shift keying) transceiver with integrated link manager for reliable control of star networks (up to 8 clients). It features low power, high sensitivity, data rates from 250 kbps up to 2 Mbps, and integrates a digital RSSI (received signal strength indictor), real-time-clock (RTC) and programmable clock output, a Gaussian filter, PLL (phase locked loop) and loop filter.

The AS3940 is the first 2.4 GHz transceiver with built-in star network management protocol manager that is royalty-free and provides an easy to use protocol for self-management of all network functions. This high level of integration helps to speed up system design and decreases the MCU's workload and ensures robust data transfer (burst and streaming modes) and correct protocol handling. The AS3940 offers excellent adjacent channel rejection and sensitivity and unique features like battery voltage monitoring, adaptive channel switching, integrated TX/RX switch and 4 separate 256-bit user data buffers.

Other features include programmable output power, efficient power management and power-optimized wakeup modes, battery voltage detection, and adaptive channel switching/support of frequency hopping. The performance and integrated functions of the AS3940 make it very well suited for a number of applications, including body area networks (health, fitness), wireless sensor networks, active smart labels, home & building automation, interactive remote controls, and data streaming.

According to Johnsy Varghese, austriamicrosystems' Marketing Manager Wireless, "The AS3940 enables customers to be RF implementers instead of RF experts. With its high performance and adaptive channel switching features the AS3940 creates a robust wireless system, even in dense WiFi environments."




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