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HF RFID reader IC packs antenna auto-tuning

Posted: 11 Sep 2009 ?? ?Print Version ?Bookmark and Share

Keywords:RFID? reader IC? PCB? antenna?

AS3910 HF RFID reader

austriamicrosystems has introduced the AS3910 HF RFID reader IC that features antenna auto-tuning, making it suitable for portable applications and products that use PCB antennas. The reader delivers 1W of output power from a 3.3V supply, 4x the nearest competitor.

Auto-tuning on chip means there is no longer the need for manual tuning of the antenna in production or in the field. With the possibility to dynamically auto tune 10 percent of the resonant frequency, the user can spend less time on system issues, where there is a lot of metal in the field. This allows the customer to get to market quicker and focus more effort on building their unique IP around the AS3910.

Including ISO 14443 A & B data framing on chip and incorporated automatic modulation depth adjustment allows even a relative novice to become an implementer of RFID. The device's power efficiency and true differential drive makes the AS3910 suitable for ISO 15693 applications. The AS3910 enables read ranges of up to 30cm with no need for any external booster circuitry.

"The AS3910 changes the game in the HF RFID reader arena," said Bruce Ulrich, director of marketing consumer business at austriamicrosystems. "The solution is perfect for experts and non-consumers alike".

The AS3910 is available now in QFN 32 5mm x 5mm.

For application notes on RFID reader click here.

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