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ams AS3911 NFC Initiator/HF Reader IC

ams AS3911 NFC Initiator/HF Reader IC 

ams AS3911 NFC Initiator/HF Reader IC is a highly integrated NFC Initiator/HF Reader IC. It includes the analog front end (AFE) and a highly integrated data framing system. The data framing system is for ISO 18092 (NFCIP-1) initiator, ISO 18092 (NFCIP-1) active target, ISO 14443 A and B reader (including high bit rates) and FeliCa™ reader. Implementation of other standard and custom protocols like MIFARE™ Classic 1 is possible using the AFE and implementing framing in the external microcontroller (Stream and Transparent modes). Also includes the AS3911 automotive reference design that demonstrates a small and low cost 13.54MHz RFID reader which can directly fit into the door handles of the car.

Features
  • NFC Active P2P support
  • ISO 18092 (NFCIP-1) Active P2P
  • ISO14443 A, B and FeliCa
  • High data transfer with ASK VHBR and fast SPI
  • Support of VHBR (3.4Mbit/s PICC to PCD framing, 6.8Mbit/s AFE and PCD to PICC framing)
  • 6μA consumption at sensing every 100ms Capacitive sensing - Wake-up
  • Antenna tuning on the fly
  • Automatic Antenna Tuning system providing tuning of antenna LC tank
  • Stable modulation index at ASK modulation
  • Automatic modulation index adjustment
  • No communication holes
  • AM and PM (I/Q) demodulator channels with automatic selection
  • High output power for EMVCo readers Up to 1W in case of differential output
  • High Rx sensitivity
  • User selectable and automatic gain control

  • Allows implementation of custom framings
  • Transparent and Stream modes to implement MIFARE™ Classic compliant or other custom protocols
  • Multi Antenna support Possibility of driving two antennas in single ended mode
  • Smaller Oscillator size
  • Oscillator input capable of operating with 13.56MHz or 27.12MHz crystal with fast start-up
  • Easy FIFO handling 10Mbit SPI with 96 bytes FIFO
  • Wide supply voltage range from 2.4V to 5.5V
  • Fits Temperature requirements for various applications
  • Wide temperature range: -40°C to 125°C
  • Small outline, good cooling through exposed pad
  • QFN 5x5 LD32 package

Applications
  • EMV Payment
  • Access Control
  • NFC Infrastructure
  • Ticketin
 
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Functional Block Diagram
Functional Block Diagram
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Published: 2015-07-09 | Updated: 2015-07-09