ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

AS3911B NFC/HF Reader

High performance HF/NFC reader IC for payment

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The AS3911B is a high performance NFC Reader IC ideal for traditional EMVco as well as smartphone & µSD card payment transaction using ALM (active load modulation). Unique features include Antenna Auto Tuning, 1W of output power and capacitive Wakeup.

Key Features

  • Up to 1W of output power
  • Antenna Auto Tuning
  • Capacitive Wakeup
  • Automatic Modulation Depth Adjustment
  • Next generation Receiver stages

Key Benefits

  • No need for external booster
  • Works in challenging environments
  • Ultralow power wakeup at 5µA
  • Interoperability with type B
  • Best interoperability with ALM devices on the market

Product Facts

Protocols supported [ ] ISO 14443A/B (848kbps)
ISO 15693
ISO 18092 (NFC active)
Frequency [MHz] 13.56
Antenna management [ ]
Wakeup [ ] Capacitive & inductive
Closed loop modulation depth adjustment
Max. output power [mW] 1000
Datarate [kbps] up to 6800 (VHBR)
Supply voltage [V] 2.4 - 5.5
Temperature range [°C] -40 to +125
Package [ ] QFN-32 (5x5)

Additional Information


The AS3911B is suitable for a wide range of applications including

  • EMVco payment terminals
  • Phone & µSD/Sim payment terminals
  • Access Control
  • Automotive
  • NFC Infrastructure and
  • Ticketing