ST25R3911B-AQFT

ST25R3911B-AQFT is a high-performance HF reader/NFC initiator IC with 1.4W supporting VHBR and AAT. It includes the analogue front end (AFE) and a highly integrated data framing system for ISO 18092 (NFCIP-1) initiator, ISO 18092 (NFCIP-1) active target, ISO 14443A and B reader (including high bit rates), ISO 15693 reader and FeliCa™ reader. Implementation of other standard and custom protocols like MIFARE™ Classic is possible using the AFE and implementing framing in the external microcontroller (Stream and Transparent modes). The ST25R3911B is positioned perfectly for the infrastructure side of the NFC system, where users need optimal RF performance and flexibility combined with low power. Typical applications include The ST25R3911B is suitable for a wide range of applications, among them E-government, access control, payment, EMVCo® 2.6b, NFC infrastructure and ticketing.

• Wide supply voltage range from 2.4V to 5.5V
• Capacitive sensing - wake-up
• Automatic antenna tuning system providing tuning of antenna LC tank
• Automatic modulation index adjustment
• High performance HF reader /NFC initiator with 1.4W supporting VHBR and AAT
• AM and PM demodulator channels with automatic selection
• DPO (Dynamic power output), up to 1.4W in case of differential output
• User selectable and automatic gain control, 6Mbit/s SPI with 96 bytes FIFO
• 32-pin QFN (5x5 mm) package
• Temperature range from -40 to 125°C