AS3931 DB

AS3931 DB Datasheet

AS3931

Part	Datasheet
AS3931 DB	AS3931 DB (pdf)

Related Parts	Information
AS3931-ZTST	AS3931-ZTST
AS3931-ZTSU	AS3931-ZTSU
AS3931-ZTSM	AS3931-ZTSM

PDF Datasheet Preview
austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 e-Mail: Please visit our website at Datasheet AS3931 3D Low Power Wakeup Receiver 1 General Description Error tolerant digital pattern correlator that detects a given code sequences in the received data signal and generates a wakeup The AS3931 is an ultra low power, three channel LF ASK receiver designed to operate in various applications such as LF identifications systems and LF tag receivers. AS3931 detects a low frequency 2 Key Features lid ASK-modulated signal by looking for a digital wakeup pattern and generates a WAKE signal after successful pattern detection. The device incorporates an intelligent pattern detection algorithm that provides reliable operation in presence of strong interference. An a RSSI signal can be generated at the RSSI pin for each receiver channel. v The product is available in 16-pin TSSOP package. The AS3931 contains: ill Antenna rotation switch Three independent LF receiver chains t Wakeup output combining the three receiver chains G s Low power 32.768kHz crystal oscillator circuit Serial programming interface A t Voltage regulator with 2.4V output, on/off switchable s n Each independent LF receiver chain contains: Input overload protection e Input attenuator m 3 Apptlications Ultra low power LF amplifier with logarithmic envelope output a n Robust data detector with adaptive slicing threshold that o translates the logarithmic envelope into a digital data signal. signal. Sophisticated power management logic that powers down the correlator if no data is received. Programmable Serial Data Interface Flexible carrier frequencies Three axis wakeup pattern detection Three axis LF field strength measurement Antenna rotation for easy calibration High sensitivity and high dynamic range Wide operating frequency range Reliable, interference resistant wakeup decoding Highly protected differential inputs Ultra low power consumption Automotive qualified 16-pin TSSOP package The device is ideal for LF identification systems, LF tag receivers, three dimensional LF field strength measurement systems, and Ultra low power wake up systems. c Figure Typical Application Diagram icalCBAT n Transmitting TechAntenna Receiving Antennas VCC LF1N LF1P LF2N LF2P LF3N AS3931 VREG RSSI SDA SCL CS WAKE CREG RSSI DATA CLOCK CHIP SEL WAKE LF3P XOUT XTAL 1 - 30 AS3931 Technical c 12 Ordering Information 29 3 - 30 AS3931 Datasheet - Pin Assignments 4 Pin Assignments Figure Pin Assignments 16-pin TSSOP Package LF1N VREG RSSI LF1P LF2N AS3931 LF2P LF3N WAKE LF3P till Pin Descriptions G s Table Pin Descriptions A t Pin Name VCC s n LF1N e LF1P m t LF2N LF2P a n LF3N LF3P o GND c XIN XOUT l WAKE Pin Number 1 2 3 4 5 6 7 8 9 10 11 ic SCL n RSSI Tech VREG Pin Type Supply Input Analog Input Analog Input Analog Input Analog Input Analog Input Analog Input Ground Analog Input Analog Output Open Drain Digital Input with Pulldown Digital Input with Pulldown Digital Input with Pulldown Analog/Digital output Analog Output XOUT Positive Supply Voltage Channel 1 negative input Channel 1 positive input Channel 2 negative input Channel 2 positive input Channel 3 negative input Channel 3 positive input Negative Supply Voltage Crystal Oscillator Pin 1 Crystal Oscillator Pin 2 Wake Up Detect output/Reset output Chip Select Serial Clock Serial Data Received Signal Strength Indicator signal/ Digital Test mode signal output Regulator Output Voltage valid 4 - 30 AS3931 Datasheet - Absolute Maximum Ratings Updated the Ordering table 31 Updated Absolute Maximum Ratings, Package Drawings and Markings. 28 - 30 AS3931 Datasheet - Ordering Information 12 Ordering Information Table 3D1e. vOicredeIDring InformatPioanrt Number AS3931-TPD AS3931-ZTST AS3931-ZTSM Delivery Form1 Tape and Reel Tape and Reel Package 16-pin TSSOP 16-pin TSSOP Dry pack sensitivity level = 3, according to IPC/JEDEC J-STD-033A Where T = Temperature range P = Package Type D = Delivery Form Z = Others TS = TSSOP M = Tape & Reel 500 pcs / reel ill T = Tape & Reel 4500 pcs / reel Note All products are RoHS compliant and Pb-free. t Buy our products or get free samples online at ICdirect G s For further information and requests, please contact us Technicaaml scoAntent or find your local distributor at valid 29 - 30 AS3931 Datasheet - Copyrights Copyrights Copyright 1997-2011, 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 lid 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 a 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 v 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. ill 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, t 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. amscoAnGtent s ContactInformation l Headquarters a austriamicrosystems AG Tobelbaderstrasse 30 ic A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 n For Sales Offices, Distributors and Representatives, please visit Tech 30 - 30

PDF Datasheet Preview

austriamicrosystems AG is now
ams AG

The technical content of this austriamicrosystems datasheet is still valid.

Contact information Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 e-Mail:

Please visit our website at

Datasheet

AS3931
3D Low Power Wakeup Receiver
1 General Description

Error tolerant digital pattern correlator that detects a given code sequences in the received data signal and generates a wakeup

The AS3931 is an ultra low power, three channel LF ASK receiver designed to operate in various applications such as LF identifications systems and LF tag receivers. AS3931 detects a low frequency
2 Key Features lid ASK-modulated signal by looking for a digital wakeup pattern and
generates a WAKE signal after successful pattern detection. The device incorporates an intelligent pattern detection algorithm that provides reliable operation in presence of strong interference. An
a RSSI signal can be generated at the RSSI pin for each receiver
channel.
v The product is available in 16-pin TSSOP package.

The AS3931 contains:
ill Antenna rotation switch

Three independent LF receiver chains
t Wakeup output combining the three receiver chains G s Low power 32.768kHz crystal oscillator circuit

Serial programming interface

A t Voltage regulator with 2.4V output, on/off switchable s n Each independent LF receiver chain contains:

Input overload protection
e Input attenuator m 3 Apptlications Ultra low power LF amplifier with logarithmic envelope output a n Robust data detector with adaptive slicing threshold that o translates the logarithmic envelope into a digital data signal.
signal. Sophisticated power management logic that powers down the correlator if no data is received.

Programmable Serial Data Interface Flexible carrier frequencies Three axis wakeup pattern detection Three axis LF field strength measurement Antenna rotation for easy calibration High sensitivity and high dynamic range Wide operating frequency range Reliable, interference resistant wakeup decoding Highly protected differential inputs Ultra low power consumption Automotive qualified 16-pin TSSOP package

The device is ideal for LF identification systems, LF tag receivers, three dimensional LF field strength measurement systems, and Ultra low power wake up systems.
c Figure Typical Application Diagram icalCBAT
n Transmitting TechAntenna

Receiving Antennas

VCC LF1N LF1P LF2N LF2P LF3N

AS3931

VREG RSSI SDA SCL

CS WAKE

CREG

RSSI DATA CLOCK CHIP SEL WAKE

LF3P

XOUT

XTAL
1 - 30

AS3931
Technical c 12 Ordering Information 29
3 - 30

AS3931

Datasheet - Pin Assignments
4 Pin Assignments

Figure Pin Assignments 16-pin TSSOP Package

LF1N

VREG

RSSI

LF1P

LF2N

AS3931

LF2P

LF3N

WAKE

LF3P
till Pin Descriptions

G s Table Pin Descriptions

A t Pin Name VCC s n LF1N e LF1P m t LF2N LF2P a n LF3N LF3P o GND c XIN XOUT l WAKE

Pin Number
1 2 3 4 5 6 7 8 9 10 11
ic SCL
n RSSI

Tech VREG

Pin Type

Supply Input Analog Input Analog Input Analog Input Analog Input Analog Input Analog Input

Ground Analog Input Analog Output Open Drain Digital Input with

Pulldown Digital Input with

Pulldown Digital Input with

Pulldown Analog/Digital
output Analog Output

XOUT

Positive Supply Voltage Channel 1 negative input Channel 1 positive input Channel 2 negative input Channel 2 positive input Channel 3 negative input Channel 3 positive input Negative Supply Voltage Crystal Oscillator Pin 1 Crystal Oscillator Pin 2 Wake Up Detect output/Reset output

Chip Select

Serial Clock

Serial Data

Received Signal Strength Indicator signal/ Digital Test mode signal output Regulator Output Voltage
valid
4 - 30

AS3931

Datasheet - Absolute Maximum Ratings
Updated the Ordering table 31 Updated Absolute Maximum Ratings, Package Drawings and Markings.
28 - 30

AS3931
Datasheet - Ordering Information
12 Ordering Information

Table 3D1e. vOicredeIDring InformatPioanrt Number

AS3931-TPD

AS3931-ZTST AS3931-ZTSM

Delivery Form1 Tape and Reel Tape and Reel

Package
16-pin TSSOP 16-pin TSSOP

Dry pack sensitivity level = 3, according to IPC/JEDEC J-STD-033A

Where T = Temperature range P = Package Type D = Delivery Form Z = Others TS = TSSOP M = Tape & Reel 500 pcs / reel
ill T = Tape & Reel 4500 pcs / reel

Note All products are RoHS compliant and Pb-free.
t Buy our products or get free samples online at ICdirect G s For further information and requests, please contact us Technicaaml scoAntent or find your local distributor at
valid
29 - 30

AS3931

Datasheet - Copyrights

Copyrights

Copyright 1997-2011, 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
lid 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
a 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
v 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.
ill 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,
t 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.
amscoAnGtent s ContactInformation l Headquarters a austriamicrosystems AG

Tobelbaderstrasse 30
ic A-8141 Unterpremstaetten, Austria

Tel +43 0 3136 500 0 Fax +43 0 3136 525 01
n For Sales Offices, Distributors and Representatives, please visit Tech
30 - 30

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 AS3931 DB Datasheet file may be downloaded here without warranties.

Datasheet ID: AS3931 DB 519726