New from austriamicrosystems is the AS3940, a fully integrated 2,4 GHz multichannel FSK (frequency shift keying) transceiver with integrated link manager for control of star networks with up to eight clients. It features low power, high sensitivity, data rates from 250 Kbps up to 2 Mbps, and integrates a digital RSSI (received signal strength indicator), real-time-clock (RTC) and programmable clock output, a Gaussian filter, PLL (phase locked loop) and loop filter.
The device’s built-in star network management protocol manager is royalty-free and provides an easy to use protocol for self-management of all network functions. This high level of integration not only speeds system design, but also decreases the MCU’s workload and ensures robust data transfer (burst and streaming modes) and correct protocol handling. The AS3940 also offers excellent adjacent channel rejection and sensitivity (-100 dBm @ 250 Kbps,
-92 dBm @ 2 Mbps) and features such as battery voltage monitoring, adaptive channel switching, integrated TX/RX switch and four separate 256-bit user data buffers.
Other features include programmable output power, efficient power management and power-optimised wakeup modes, and support of frequency hopping. The performance and integrated functions of the AS3940 make it well suited for a number of applications, including body area networks (health, fitness), wireless sensor networks, active smart labels, home and building automation, interactive remote controls and data streaming.
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