AS3911-BQFT

AS3911-BQFT Datasheet

AS3911

Part	Datasheet
AS3911-BQFT	AS3911-BQFT (pdf)

PDF Datasheet Preview
AS3911 NFC Initiator / HF Reader IC The AS3911 is a highly integrated NFC Initiator / HF Reader IC. It includes the analog front end AFE and a highly integrated data framing system 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 is possible through using the AFE and implementing framing in the external microcontroller Stream and Transparent modes . Compared with concurrent NFC devices designed with the mobile phone in mind, the AS3911 is positioned perfectly for the infrastructure side of the NFC system, where users need optimal RF performance and flexibility combined with low power. With ams unique Automatic Antenna Tuning technology, the device is optimized for applications with directly driven antennas. The AS3911 is alone in the domain of HF Reader ICs in that it contains two differential low impedance 1Ω antenna drivers. The AS3911 includes several features, which make it incomparable for low power applications. It contains a low power capacitive sensor, which can be used to detect the presence of a card without switching on the reader field. Additionally, the presence of a card can also be detected by performing a measurement of amplitude or phase of signal on antenna LC tank and comparing it to stored reference. It also contains a low power RC oscillator and wake-up timer, which can be used to wake the system after a defined time period and check for the presence of a tag using one or more techniques of low power detection of card presence capacitive, phase or amplitude . The AS3911 is designed to operate from a wide power supply range from 2.4V to 5.5V peripheral interface IO pins support power supply range from 1.65V to 5.5V. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet [v2-11] 2016-Jun-13 Page 1 Document Feedback AS3911− GeneralDescription Figure 1 Added Value of Using AS3911 Key Benefits & Features The benefits and features of AS3911, NFC Initiator / HF Reader IC are listed below: NFC Active P2P support ISO 18092 NFCIP-1 Active P2P ISO14443 A, B and FeliCa TM High data transfer with ASK VHBR and fast SPI 6uA consumption at sensing every 100ms Support of VHBR Mbit/s PICC to PCD framing, Mbit/s AFE and PCD to PICC framing 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 1 W 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 MHz or MHz crystal with fast start-up Easy FIFO handling 10 M bit SPI with 96 bytes FIFO Wide supply voltage range from V to V Fits Temperature requirements for various applications Wide temperature range -40°C to 125°C Small outline, good cooling through exposed pad QFN 5mm x 5mm LD32 package Page 2 Document Feedback ams Datasheet [v2-11] 2016-Jun-13 AS3911 − General Description Figure 2 AS3911 Block Diagram The AS3911 is suitable for a wide range of applications including: • EMV Payment • Access Control • NFC Infrastructure • Ticketing AS3911 − Ordering & Contact Information Ordering & Contact Information Figure 132 Ordering Information Ordering Code Package Marking AS3911-BQFT Packaged 32-pin QFN 5x5mm AS3911 Delivery Form Tape & Reel Delivery Quantity 1000 pcs/reel Buy our products or get free samples online at Technical Support is available at Provide feedback about this document at For further information and requests, e-mail us at For sales offices, distributors and representatives, please visit: Headquarters ams AG Tobelbaderstrasse 30 8141 Premstaetten Austria, Europe Tel +43 0 3136 500 0 Website: ams Datasheet [v2-11] 2016-Jun-13 Page 151 Document Feedback AS3911 − RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green RoHS compliant and no Sb/Br ams Green defines that in addition to RoHS compliance, our products are free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed by weight in homogeneous material . Important Information The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Page 152 Document Feedback ams Datasheet [v2-11] 2016-Jun-13 AS3911 − Copyrights & Disclaimer Copyrights & Disclaimer ams Datasheet [v2-11] 2016-Jun-13 Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten, 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. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams 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 ams AG for current information. This product is intended for use in 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 ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams 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 ams AG rendering of technical or other services. Legal Notice: Capacitive wakeup feature is covered by patent US6150948 LOW-POWER RADIO FREQUENCY IDENTIFICATION READER for which ams AG is exclusive licensee including, not limited to copyrights, patents, trademarks and trade secrets related thereto. Purchase of ams AG ICs with MIFARE Classic compatibility: This ams AG IC offers modes to be compatible with MIFARE Classic RFID tags. This allows to build MIFARE Classic compatible reader systems. MIFARE and MIFARE Classic are trademarks of NXP B.V., High Tech Campus 60 NL-5656 AG EINDHOVEN, NL. Purchase of ams AG’s MIFARE Classic compatible products does not provide a license of any NXP rights, in particular does not provide the right to use MIFARE or MIFARE Classic as a trademark to brand such systems. Purchase of ams AG’s ICs with ISO/IEC 14443 type B functionality: This ams AG IC is ISO/IEC 14443 Type B software enabled and is licensed under Innovatron’s Contactless Card patents license for ISO/IEC 14443 B. The license includes the right to use the IC in systems and/or end-user equipment. Page 153 Document Feedback Document Status AS3911 − Document Status Document Status Product Status Definition Product Preview Pre-Development ams Datasheet [v2-11] 2016-Jun-13 Page 159 Document Feedback

PDF Datasheet Preview

AS3911

NFC Initiator / HF Reader IC

The AS3911 is a highly integrated NFC Initiator / HF Reader IC. It includes the analog front end AFE and a highly integrated data framing system 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 is possible through using the AFE and implementing framing in the external microcontroller Stream and Transparent modes .

Compared with concurrent NFC devices designed with the mobile phone in mind, the AS3911 is positioned perfectly for the infrastructure side of the NFC system, where users need optimal RF performance and flexibility combined with low power.

With ams unique Automatic Antenna Tuning technology, the device is optimized for applications with directly driven antennas. The AS3911 is alone in the domain of HF Reader ICs in that it contains two differential low impedance 1Ω antenna drivers.

The AS3911 includes several features, which make it incomparable for low power applications. It contains a low power capacitive sensor, which can be used to detect the presence of a card without switching on the reader field. Additionally, the presence of a card can also be detected by performing a measurement of amplitude or phase of signal on antenna LC tank and comparing it to stored reference. It also contains a low power RC oscillator and wake-up timer, which can be used to wake the system after a defined time period and check for the presence of a tag using one or more techniques of low power detection of card presence capacitive, phase or amplitude .

The AS3911 is designed to operate from a wide power supply range from 2.4V to 5.5V peripheral interface IO pins support power supply range from 1.65V to 5.5V.
Ordering Information and Content Guide appear at end of datasheet.
ams Datasheet [v2-11] 2016-Jun-13

Page 1 Document Feedback

AS3911− GeneralDescription

Figure 1 Added Value of Using AS3911

Key Benefits & Features

The benefits and features of AS3911, NFC Initiator / HF Reader IC are listed below:

NFC Active P2P support

ISO 18092 NFCIP-1 Active P2P ISO14443 A, B and FeliCa TM

High data transfer with ASK VHBR and fast SPI
6uA consumption at sensing every 100ms

Support of VHBR Mbit/s PICC to PCD framing, Mbit/s AFE and PCD to PICC framing

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 1 W 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 MHz or MHz crystal with fast start-up

Easy FIFO handling
10 M bit SPI with 96 bytes FIFO

Wide supply voltage range from V to V

Fits Temperature requirements for various applications

Wide temperature range -40°C to 125°C

Small outline, good cooling through exposed pad

QFN 5mm x 5mm LD32 package

Page 2 Document Feedback
ams Datasheet [v2-11] 2016-Jun-13

AS3911 − General Description

Figure 2 AS3911 Block Diagram

The AS3911 is suitable for a wide range of applications including:
• EMV Payment
• Access Control
• NFC Infrastructure
• Ticketing
AS3911 − Ordering & Contact Information
Ordering & Contact Information
Figure 132 Ordering Information
Ordering Code

Package

Marking

AS3911-BQFT

Packaged 32-pin QFN 5x5mm

AS3911

Delivery Form

Tape & Reel

Delivery Quantity
1000 pcs/reel

Buy our products or get free samples online at Technical Support is available at Provide feedback about this document at For further information and requests, e-mail us at For sales offices, distributors and representatives, please visit:

Headquarters ams AG Tobelbaderstrasse 30 8141 Premstaetten Austria, Europe

Tel +43 0 3136 500 0 Website:
ams Datasheet [v2-11] 2016-Jun-13

Page 151 Document Feedback

AS3911 − RoHS Compliant & ams Green Statement

RoHS Compliant & ams Green Statement

RoHS The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes.
ams Green RoHS compliant and no Sb/Br ams Green defines that in addition to RoHS compliance, our products are free of Bromine Br and Antimony Sb based flame retardants Br or Sb do not exceed by weight in homogeneous material .

Important Information The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

Page 152 Document Feedback
ams Datasheet [v2-11] 2016-Jun-13

AS3911 − Copyrights & Disclaimer

Copyrights & Disclaimer
ams Datasheet [v2-11] 2016-Jun-13

Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten, 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.

Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams 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 ams AG for current information. This product is intended for use in 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 ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed.
ams 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 ams AG rendering of technical or other services.

Legal Notice:

Capacitive wakeup feature is covered by patent US6150948 LOW-POWER RADIO FREQUENCY IDENTIFICATION READER for which ams AG is exclusive licensee including, not limited to copyrights, patents, trademarks and trade secrets related thereto.

Purchase of ams AG ICs with MIFARE Classic compatibility:

This ams AG IC offers modes to be compatible with MIFARE Classic RFID tags. This allows to build MIFARE Classic compatible reader systems. MIFARE and MIFARE Classic are trademarks of NXP B.V., High Tech Campus 60 NL-5656 AG EINDHOVEN, NL. Purchase of ams AG’s MIFARE Classic compatible products does not provide a license of any NXP rights, in particular does not provide the right to use MIFARE or MIFARE Classic as a trademark to brand such systems.

Purchase of ams AG’s ICs with ISO/IEC 14443 type B functionality:

This ams AG IC is ISO/IEC 14443 Type B software enabled and is licensed under Innovatron’s Contactless Card patents license for ISO/IEC 14443 B. The license includes the right to use the IC in systems and/or end-user equipment.

Page 153 Document Feedback

Document Status

AS3911 − Document Status

Document Status Product Status

Definition

Product Preview

Pre-Development
ams Datasheet [v2-11] 2016-Jun-13

Page 159 Document Feedback

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Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS3911-BQFT Datasheet file may be downloaded here without warranties.

Datasheet ID: AS3911-BQFT 519725