SCIENCE

Austriamicrosystems has announced the AS3940, the 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 eight clients). It features low power, high sensitivity (-100 dBm @ 250kbps, -92 dBm @ 2 Mbps), 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 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 @ 2Mbps) and unique features like 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-optimized wakeup modes, battery voltage detection, and adaptive channel switching/support of frequency hopping.