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AS3990 PDF预览

AS3990

更新时间： 2024-10-01 06:37:47
品牌 Logo 应用领域
艾迈斯 - AMSCO PC
页数 文件大小 规格书
2页 90K
描述
UHF RFID single chip reader EPC Class1 Gen2 compatible

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中文翻译

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AS3990 技术参数

是否无铅： 不含铅生命周期：Active
Reach Compliance Code：unknown风险等级：5.58
Base Number Matches：1

AS3990 数据手册

 浏览型号AS3990的Datasheet PDF文件第2页 
PRELIMINARY INFORMATION: SUBJECT TO CHANGE WITHOUT ANY NOTICE  
UHF RFID single chip reader EPC Class1 Gen2 compatible  
AS3990  
Preliminary Information  
General Description  
Applications  
•
•
•
•
•
•
•
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Barcode label printers  
Add-on module for handheld computers, PDA  
The AS3990 UHF reader chip is an integrated  
analogue front end and data framing system for a  
900MHz RFID reader system. Built in programming  
options make it suitable for a wide range of  
Point of sales  
Currency reader  
UHF RFID reader systems  
Hand-held UHF RFID readers  
Toll systems  
applications in UHF RFID systems. Designed to  
simplify the design and implementation of an EPC  
Class 1Gen2 reader, this IC requires only a standard  
8Bit microcontroller with minimal other components.  
mobile phones  
Key Features  
The AS3990 comprises the EPC Class 1- Gen2  
protocol (ISO 18000-6c) with digital high speed logic  
up to the framing level and supports the ISO 18000-  
6a and ISO 18000-6b Protocol with direct data mode.  
The Interface to the microcontroller can be either a 4  
pin serial date Interface (SDI) or alternatively in case  
of high data rates are necessary an eight Bit parallel.  
The frame management will be done using a 12 Byte  
FIFO in order to decrease processor workload and  
ensure a smooth data stream and correct protocol  
handling. All low level transmission codec’s and CRC  
generation is done internally.  
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•
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Fully compliant with ISO 18000 6a, 6b, 6c and  
EPC Class 1- Gen2 protocol using external MCU  
EPC Class 1 -Gen2 framing support using low  
cost 8 Bit microcontroller  
Direct data mode in the frequency range of 860 to  
960 MHz enables propriety Protocol support  
Internal power amplifier with level controlled  
20dBm for short range applications  
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Modulator using ASK or PR-ASK modulation  
Adjustable ASK modulation index  
Automatic selection between I and Q Signal  
ensuring no “communication holes”  
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Built-in reception low-pass and high-pass filters  
having selectable corner frequencies.  
An on chip level shifter with a special supply pin can  
be used to adapt microcontroller supply voltages in  
the range of 1.8- 3.3V for optimized power usage. In  
order to reduce the BOM, an integrated LDO with  
driver strength of 20mA can be used to supply the  
microcontroller. Additional regulators for the RF  
section suppress disturbances and thus allow noisy  
main supply.  
On chip VCO and PLL covering complete RFID  
frequency range and frequency hopping support  
Selectable receiver gain with AGC  
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Supported link frequencies from 40 up to 640kHz  
Package  
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64 pin QFN 9*9  
A 20MHz crystal is used for the reference oscillator.  
Using this reference, an additional programmable  
glitch free clock output can be used to clock the  
microcontroller thus saving costs and current. In  
addition, by using the integrated power management  
features modes power-down, standby and active it is  
possible to shut down or reduce the microcontroller  
clock and hence save additional power.  
Revision 1.2, 20.09.2007  
Page 1 of 2  
12

中文翻译

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