AS3910
13.56 MHz RFID Reader IC, ISO-14443 A/B
www.austriamicrosystems.com/HF_RFID_Reader/AS3910 Revision 2.3 1 - 3
Product Brief
1 General Description
The AS3910 is a high performance 13.56MHz HF RFID Reader IC.
With austriamicrosystems’ unique antenna management technology
it is optimized for applications with directly driven antennas.
The AS3910 is unequalled in the domain of HF Reader ICs in that it
contains two differential low impedance (1.5Ω) antenna drivers.
These drivers are unmatched meaning the IC can deliver up to 8
times the output power of a standard HF Reader IC using the same
power supply voltage.
Additionally using this configuration means half of the power
consum ption at th e same output power.
The IC has an operating voltage down to 2.4V and a low power
operating m ode of 5mA. Th is mean s the AS3910 i s ideal for po rtable
or battery powered applications.
For applications where high power is required (EMV) the AS3910
can attain up to 700mW. This means there is no need for complex
external booster circuitry .
The component count and complexity of the design is further
reduced through the patented automatic modulation depth
adjustment.
The analog front end (AFE) is complimented by a highly integrated
data framing engine for both ISO-14443 A and B.
This includes data rates up to 848kbits with all framing and
synchronization tasks on board. This enables the customer to build a
complete HF RFID Reader using only a low end micro.
The AS3910 not only supports reader to tag communication, but
sports Peer to Peer communication using the NFCIP-1 active
communication mode with a data rate of 106kbps.
The IC has a SPI, which enables bi-directional communication with
the external microcontroller.
Other standard and custom protocols, such as ISO-15693 can be
implemented via transparent mode.
2 Key Features
Close loop adjustment of ASK modulation for accurate control
of modulation depth in case of ISO-14443B protocol
Antenna trimming system providing correction range of LC
Low power operating mode reduces receiver consumption from
10mA to 5mA
Low power (3.5µA) NFC target mode
Integrated regulators to boost system PSRR
AM/PM demodulator to eliminate communication holes
RSSI measurement
Accurate RF envelope measurement (8 bit A/D)
High output power at 3.3V power supply:
- u p to 700mW in case regulator is externally shorted
- up to 500mW in case differential output and antenna trimming
is used
- up to 125mW in case of single ended output and antenna
trimming is used
Squelch feature which performs gain reduction to compensate
for noise generated by transponder processing
User selectable and automatic gain control
Transparent mode to implement other standard and custom
protocols (ISO-15693, Felica, ….)
Quartz oscillator capable of operating with 13.56MHz or
27.12MHz crystal with fast start-up
Additional A/D converter input, Serial peripheral interface (SPI)
with 32 byte FIFO
Supply voltage range from 2.4V to 3.6V
Wide temperature range: -40ºC to 85ºC
QFN 32 5x5 package
3 Applications
The AS3910 is ideal for applications where the reader antenna is
directly driven (no 50Ω cable). It also includes several unique
features, which make it especially suitable for low power and battery
powered applications.
www.austriamicrosystems.com/HF_RFID_Reader/AS3910 Revision 2.3 2 - 3
AS3910
Product Brief - Applications
Figure 1. AS3910 HF RFID Reader IC Block Diagram
Logic
XTO XTI
RFO1
RFO2
RFI1
RFI2
SPI
FIFO
Bias
Transmitter
A/D Converter
Receiver
External Field
Detector
Regulators
FIFO
Control Logic
SPI Interface
Framing
Phase &
Amplitude
Detector
Oscillator
AS3910 HF RFID Reader IC Block Diagram
www.austriamicrosystems.com/HF_RFID_Reader/AS3910 Revision 2.3 3 - 3
AS3910
Product Brief - Ordering Information
4 Ordering Information
The devices are available as the standard products shown in Table 1.
Note: All products are RoHS compliant and Pb-free.
Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect
For further information and requests, please contact us: RFID@austriamicrosystems.com
or find your local distributor at http://www.austriamicrosystems.com/distributor
Copyrights
Copyright © 1997-2010, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®.
All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of
the copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale.
austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding
the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at
any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for
current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range,
unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are
specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100
parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location.
The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However , austriamicrosystems AG shall not
be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use,
interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing,
performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of
austriamicrosystems AG rendering of technical or other services.
Contact Information
Headquarters
austriamicrosyste ms AG
Tobelbaderstrasse 30
A-8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0
Fax: +43 (0) 3136 525 01
RFID@austriamicrosystems.com
For Sales Offices, Distributors and Representa tive s, plea se vis it:
http://www.austriamicrosystems.com/contact
Table 1. Ordering Information
Ordering Code Description Delivery Form Package
AS3910-BQFT HF RFID Reader IC Tape & Reel 32-pin QFN (5x5mm)
