矽控推出ST ST25RU3993RAIN (UHF) RFID读卡器解决方案

随着原来AMS AS3992（ST25RU3992）芯片停产，矽控推出近10年的AS3992 UHF RFID解决方案全面向ST25RU3993平台迁移。目前推出有基于PIC24 MCU主控的ST25RU3993解决方案。

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ST公司的ST25RU3993RAIN® (UHF) RFID多协议读卡器,支持840-960 MHz UHF波段和ISO18000-62 & -63, ISO29143以及与GS1’s EPC UHF Gen2空中接口协议兼容.器件包括片上VCO和功率放大器,提供完整的RFID特性,包括密集读卡模式(DRM)功能,支持跳频,低电平发送编码,低电平译码,数据成帧和CRC检查.ST25RU3993工作电流非常低,使它非常适合用在手持设备和以电池为电源的设备如手机.工作电压3-3.6V,极低工作电压可低至2.7V,外设I/O电压从1.65V到5.5V,所支持的协议包括ISO 18000-6C (EPC Class1 Gen2),ISO 29143 (移动RFID空中接口),以及直接模式ISO 18000-6A/B,密集读卡模式(DRM)为M4和M8的250kHz和320kHz滤波器.器件集成了电源稳压器,支持跳频,采用ASK或PR-ASK调制,自动I/Q选择,用于标签跟踪的相位比特,有8位线性RSSI,工作温度-40℃ 到 85℃,采用48引脚QFN(7x7x0.9 mm)封装,标签读卡速率高达700*标签/秒(16位标签EPC长度).主要用在嵌入消费类电子/工业应用,手持读卡器,移动UHF RFID读卡器以及电池供电的固定读卡器.本文介绍了ST25RU3993主要特性,框图和基本UHF读卡器系统框图,发送和接收部分框图,以及评估板ST25RU3993-EVAL主要特性,电路图和PCB设计图.

The ST25RU3993 RAIN® (UHF) RFID reader device provides multi-protocol support for the 840-960 MHz UHF band compatible with ISO18000-62 & -63, ISO29143 and to GS1’s EPC UHF Gen2 air interface protocol. It includes an on-chip VCO and a power amplifier, and offers a complete set of RFID features including dense reader mode (DRM) functionality and support for frequency-hopping, low-level transmission coding, low-level decode, data framing and CRC checking.

The ST25RU3993 operates at very low-power, making it suitable for use in portable and battery-powered equipment such as mobile phones.

Packaged in a 7x7 mm QFN, the ST25RU3993 is able to deliver very high sensitivity and provides high immunity against the effects of antenna reflection and self-jamming. This is critical in mobile and embedded applications, in which antenna design is often compromised by cost or size constraints. High sensitivity enables the end-products to achieve their required read range while using a simpler and cheaper antenna, thus reducing overall system cost.

Thanks to its high level of integration, the ST25RU3993 requires only an external 8-bit microcontroller to create a complete RFID reader system, thus eliminating the need for a complex RFID co-processor.

ST25RU3993主要特性:

• Supply voltage range 3.0 to 3.6 V

– Limited operation possible down to 2.7 V

– Maximum PA supply voltage 4.3 V

– Peripheral I/O supply range 1.65 to 5.5 V

• Protocol support for:

– ISO 18000-6C (EPC Class1 Gen2)

– ISO 29143 (Air interface for mobile RFID)

– ISO 18000-6A/B through direct mode

• DRM: 250 kHz and 320 kHz filters for M4 and M8

• Integrated supply regulators

• Frequency hopping support

• ASK or PR-ASK modulation

• Automatic I/Q selection

• Phase bit for tag tracking with 8-bit linear RSSI

• Temperature range: -40℃ to 85℃

• 48-pin QFN (7x7x0.9 mm) package

• Tag read rates of up to 700* tags/s (16-bit tag EPC length)

ST25RU3993主要应用:

The ST25RU3993 device is ideally suited for:

• Embedded consumer/industrial applications with cost constraints such as beverage dispensing

• Hand-held readers

• Mobile UHF RFID readers

• Battery-powered stationary readers

图1.ST25RU3993框图