ams AG analog ICs and sensors announced that US-based DeviceFidelity, Inc. is using unique ams RF technology in its latest CredenSE 2.10 NFC microSD card to enable secure, certified NFC transmissions between any mobile phone and contactless payment terminals from Visa and MasterCard. DeviceFidelity CredenSE 2.10 is the world’s first NFC microSD card to successfully achieve global payment certifications from both Visa and MasterCard without requiring external booster antenna or device specific attachments. Using the AS3922 from ams, an integrated NFC front end with Active Boost technology, CredenSE achieves a typical read range of 4cm in a mobile phone’s microSD slot. The mobile phone is a notoriously difficult environment for RF and variations between phone models make it difficult to consistently achieve good performance. The stringent requirements for read range compatibility with payment terminals for payment applications cannot be met in small form factors such as SIM or microSD cards with a traditional passive NFC card emulation front end and simple planar antenna. The DeviceFidelity CredenSE 2.10 is the first commercially produced NFC microSD card that meets EMV standards using only an ultra-small antenna embedded in the card, making distribution and compatibility with hundreds of phone models possible with one easy-to-deploy microSD card. It can be used to transform any mobile device with a microSD card slot into a contactless payment device without any need for device specific external antenna or attachments. Active Boost allows for robust tag-to-reader communication at a coupling factor 100 times higher than is possible with conventional passive tag designs. The AS3922 also offers unique Antenna Auto Tuning and Q factor adjustment, which are critical to microSD, SIM and µSIM applications. The IC includes an ACLB interface for communication with the contactless interface of any Dual Interface Secure Element, and DCLB and NFC-WI interfaces for digital communication.