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RFID readers deliver consistent tag reads

Posted: 22 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:RFID? reader? antenna? TI? tag?

Texas Instruments Inc. (TI) has announced the TRF7960 family of high-frequency (13.56MHz), multistandard RFID reader ICs. The advanced package design this IC family measures 5-by-5mm and supports ISO/IEC 14443A/B, ISO/IEC 15693, ISO/IEC 18000-3 and TI's contactless commerce and Tag-It portfolio.

To maximize read range and reliability, the integrated on-board linear voltage regulators that turn up the analog, digital and power amplifiers provide power supply noise isolation. This reader family has an integrated analog front end and data framing system for all the supported standards, while its dual receiver input configuration detects AM and PM. This feature helps eliminate read "holes" created when antenna orientation in the operating environment changes the tag return signal from AM to PM, resulting in more consistent tag reads.

A single crystal
By providing an internal clock for the MCU, the TRF7960 powered reader uses a single 13.56MHz crystal rather than the standard two crystals, reducing the total BOM of the end reader product. Designed with fewer components, this reader IC consumes less power, takes up less space and can therefore address sensitivity and noise attenuation issues, the company said. Other integrated functions include error checking, data formatting, framing and anticollision support for multireader environments. The TRF7960 is designed for both fixed and handheld reader devices.

Power consumption for the overall reader is reduced by providing seven flexible manual or automated configuration settings, which shut down unused sections of the reader to save power. The TRF7960 IC operates between 2.7Vdc to 5.5Vdc input supply voltage and when in power down mode, consumption is less than 1?A while standby current is less than 120?A.

Standards compliance
TRF7961 supports ISO/IEC 15693 and ISO/IEC 18000-3 standards and TI's Tag-It portfolio. TRF7960 supports these standards plus the ISO/IEC 14443A/B standard and TI's contactless commerce portfolio. With a high level of integration, lower power consumption and a smaller footprint, both devices are available today in the standard 32-pin QFN (IC to board) connection packages. A reference design and source code for an evaluation module, with TI's MSP430 ultralow-power MCU, is available for easy evaluation of the TRF7960 family.

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Related Datasheets
Part Number Description Category
? TRF7960 Multi-Standard Fully Integrated 13.56MHZ RFID & Data Framing Reading Sys (Rev. B) ICs, Power Management
? TRF7961 Multi-Standard Fully Integrated 13.56MHZ RFID & Data Framing Reading Sys (Rev. B) ICs, Power Management



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