ip68 connectorr has introduced the AS3933, a 3-channel low-frequency wakeup receiver that enables battery powered systems to add remote wakeup capability.
In addition, with sensitivity of 80 Î¼Vrms, both range and BOM cost can be optimised while low current consumption of 2,7 Î¼A extends battery life.
Featuring a wide receive frequency range of 15 to 150 kHz, the device 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 IC 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 provides a built-in automatic antenna tuner that tunes the antenna to the desired carrier frequency.
The programmable features of the AS3933 allow optimising settings for longer operating distance while oio_20wt retaining reliable wakeup generation. The sensitivity level can be adjusted in the presence of a strong RF field or in noisy environments. The chip operates with a 3,0?V power supply and is specified over the -40 to +85Â°C temperature range. It is available in 16-pin TSSOP and 16-pin QFN (4 x 4 mm) packages.
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