Communications

NFC device improves contactless user experience

15th February 2016
Mick Elliott

The ams AS3921 NFC (Near Field Communications) analogue front end device has been added to Ineltek’s array of wireless semiconductor solutions. Equipped with ams’ own BoostedNFC technology, the device enables huge gains in performance for space-constrained applications such as smart watches, wristbands and other wearables.

Reduced antenna size is a common compromise in miniature electronic systems with typical implementations at a small fraction of those available in contactless cards and smartphones.

The resulting reduction in wireless performance can lead to poor user experience in attempting contactless payment from a wearable device.

AS3921 overcomes this by offering boostedNFC, a 900% increase in NFC reader operating volume and 12uA operation, an 80% reduction from typical NFC controllers. The device complies with ISO/IEC 14443 (types A and B) and FeliCa RFID protocols. It has a 100mm2 antenna size compared to 2150mm2 for contactless card, and its WL-CSP 2.115mm x 1.735mm dimensions enable a 2/3 decrease in circuit footprint

These characteristics allow more reliable connection to payment terminals and ticket barriers, faster perceived transactions and greater convenience of use. Ineltek is able to provide samples, pricing, technical data and evaluation tools for the AS3921.

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