Product Brief AS3992 UHF RFID Single Chip Reader EPC Class1 Gen2 Compatible 1 General Description 2 Key Features The AS3992 UHF Gen2 Reader chip is an integrated analog frontend and provides protocol handling for ISO180006c/b 900MHz RFID reader systems. Equipped with multiple built-in programming options, the device is suitable for a wide range of UHF RFID applications. ISO18000-6C (EPC Gen2) full protocol support The AS3992 is pin to pin and firmware compatible with the previous AS3990/91 IC's. It offers improved receive sensitivity to -86dB, programmable Rx Dense Reader Mode (DRM) filters on chip and pre-distortion. Fully scalable, the AS3992 is ideal for longer range and higher power applications. Improved receive sensitivity to -86dBm Offering DRM filtering on chip, combined with improved sensitivity and pre-distortion allows the AS3992 to be the only true world wide shippable IC. The reader configuration is achieved through setting control registers allowing fine tuning of different reader parameters. Integrated data framing, Integrated CRC checking Parallel or serial interface can be selected for communication between the host system (MCU) and the reader IC. When hardware coders and decoders are used for transmission and reception, data is transferred via 24 bytes FIFO register. In case of direct transmission or reception, coders and decoders are bypassed and the host system can service the analog front end in real time. The transmitter generates 20dBm output power into 50Ω load and is capable of ASK or PR-ASK modulation. The integrated supply voltage regulators ensure supply rejection of the complete reader system. The transmission system comprises low level data coding. Automatic generation of FrameSync, Preamble, and CRC is supported. The receiver system allows AM and PM demodulation. The receiver also comprises automatic gain control option (patent pending) and selectable gain and signal bandwidth to cover a range of input link frequency and bit rate options. The signal strength of AM and PM modulation is measured and can be accessed in RSSI register. The receiver output is selectable between digitized sub-carrier signal and any of integrated sub-carrier decoders. Selected decoders deliver bit stream and data clock as outputs. The receiver system also comprises framing system. This system performs the CRC check and organizes the data in bytes. Framed data is accessible to the host system through a 24 byte FIFO register. To support external MCU and other circuitry a 3.3V regulated supply and clock outputs are available. The regulated supply has 20mA current capability. The AS3992 is available in a 64-pin QFN (9mm x 9mm), ensuring the smallest possible footprint. ISO18000-6A,B compatibility in direct mode Programmable Dense Reader Mode filters on chip allowing a true World Wide Shippable device On chip pre-distortion meaning improved external PA efficiency Integrated low level transmission coding, Integrated low level decoders Parallel 8-bit or serial 4-pin SPI interface to MCU using 24 bytes FIFO Voltage range for communication to MCU between 1.8V and 5.5V Can be powered by USB with no need for step conversion from 4.1 to 5.5 Volt Selectable clock output for MCU Integrated supply voltage regulator (20mA), which can be used to supply MCU and other external circuitry Integrated supply voltage regulator for the RF output stage, providing rejection to supply noise Internal power amplifier (20dBm) for short range applications Modulator using ASK or PR-ASK modulation Adjustable ASK modulation index AM & PM demodulation ensuring no “communication holes” with automatic I/Q selection Selectable reception gain, Reception automatic gain control AD converter for measuring TX power using external RF power detector DA converter for controlling external power amplifier Frequency hopping support On-board VCO and PLL covering complete RFID frequency range 840MHz to 960MHz Oscillator using 20MHz crystal Power down, standby and active mode available 3 Applications The device is an ideal solution for UHF RFID reader systems and hand-held UHF RFID readers. www.austriamicrosystems.com/AS3992 Revision 1.0 1-3 AS3992 Product Brief - A p p l i c a t i o n s Figure 1. AS3992 Block Diagram 2xC 31 OAD_2 30 ADC 58 DAC 4 MIX_INP MIX_INN 9 MIXS_IN 10 RFOUTN_1 27 RFOUTN_2 28 RFOUTP_1 20 RFOUTP_2 21 RFONX 32 RFOPX 33 EXT_IN 56 OSCO VCO CP www.austriamicrosystems.com/AS3992 36 37 53 52 13 15 VEXT VEXT2 VDD_MIX VDD_TXPAB CD1 CD2 VDD_5LFI 5 16 17 AS3992 IQ DownConversion Mixer DRM Filter Oscillator & Timing System 19 VDD_B 54 AGD VDD_A 59 63 VDDLF 61 VOSC VDD_RFP 34 41 VDD_IO IO0 42 IO1 43 44 IO2 IO3 45 IO4 46 IO5 47 IO6 48 IO7 51 Analog Front-end RSSI EPC Gen 2 Protocol Handling GEN-2 Frame Gen CRC 24 Byte FIFO 60 62 6 VDD_D VDD_RF 7xC Digitizer Digitizer RF Out 18 38 Gain Filter 8 11 12 14 22 23 24 25 26 29 35 55 57 65 EXP_PAD OSCI 3 VSS VSS VSN_MIX CBIB CBV5 VSN_1 VSN_2 VSN_3 VSN_4 VSN_5 VSN_D VSN_RFP VSN_A VSN_CP Directional unit 7 1 Supply Regulators & References OAD 2 MCU Interface 64 COMN_A COMN_B COMP_A COMP_B 4xC Revision 1.0 50 CLK 39 EN 40 IRQ 49 CLSYS Micro controller 2-3 AS3992 Product Brief - O r d e r i n g I n f o r m a t i o n 4 Ordering Information The devices are available as the standard products shown in Table 1. Table 1. Ordering Information 1 Ordering Code Description Delivery Form AS3992-BQFP Internal DRM compatible VCO, pre-distortion Tape and Reel in dry pack Package 64-pin QFN (9mm x 9mm) 1. Dry Pack sensitivity Level =3 according to IPC/JEDEC J-STD-033A. 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 mailto:[email protected] or find your local distributor at http://www.austriamicrosystems.com/distributor Copyrights Copyright © 1997-2009, 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. 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Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com/AS3992 Revision 1.0 3-3