New from austriamicrosystems is the AS3910 HF RFID reader IC for 13,56 MHz reader applications, with high power efficiency and antenna auto-tuning, making it well suited for portable applications and products using PCB antennas.
The device delivers 1 W of output power from a 3,3 V supply. Auto-tuning means there is no need for manual tuning of the antenna in production or in the field. With the possibility to dynamically auto tune 10% of the resonant frequency, the user can spend less time on system issues, particular in real world applications where there are metal obstructions. Including ISO 14443 A and B data framing on-chip and incorporating automatic modulation depth adjustment enables simple RFID implementation. The AS3910 enables read ranges of up to 30 cm with no need for any external booster circuitry.
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