آر اف (فرکانس رادیویی) و بی‌سیم آی‌سی آر‌اف‌آی‌دی و کنترل دسترسی

Product Attributes

Introduction

TRF7962A is an integrated analog front end and data framing device for 13.56 MHz RFID reader/writer systems. The built-in programmable options make this device suitable for a wide range of applications in proximity identification systems. The reader can be configured by selecting the desired protocol in the control registers. Direct access to all control registers allows fine-tuning of various reader parameters as needed. Comprehensive documentation, design references, evaluation modules, and source code for TI microcontrollers (based on MSP430 or ARM technology) are provided. TRF7962A is a high-performance 13.56 MHz HF RFID reader IC that incorporates support for ISO 15693. This architecture also enables users to build a complete, cost-effective, and high-performance HF RFID reader/writer. Additional standards and even custom protocols can be implemented using the two direct modes provided by the device. These direct modes (0 and 1) give users full control over the AFE and provide access to raw subcarrier data or non-framed data (already in ISO format) along with the associated (extracted) clock signal. The receiver system features a dual-input receiver architecture. The receiver also includes multiple automatic and manual gain control options. The received input bandwidth can be selected to accommodate a wide range of input subcarrier signal options. The received signal strength from transponders, ambient signal sources, or internal levels is available through the RSSI register. The receiver output can be selected between a digitized subcarrier signal and either integrated subcarrier decoder. The selected subcarrier decoder outputs the data bit stream and data clock. The TRF7962A includes a receiver framing engine. This receiver framing engine performs CRC and/or parity checks for the ISO 15693 protocol, removes EOF and SOF delimiters, and organizes data into byte format. The framed data is then accessible to the MCU via a 12-byte FIFO register. A parallel or SPI interface can be used for communication between the MCU and the TRF7962A reader. When using the built-in hardware encoder and decoder, transmit and receive functions utilize a 12-byte FIFO register. For direct transmit or receive operation, the encoder or decoder can be bypassed, allowing the MCU to process data in real time. For the MCU I/O interface, TRF7962A supports data communication levels from 1.8 V to 5.5 V. When using a 5 V supply, the transmitter offers a selectable output power level of 100 mW (+20 dBm) or 200 mW (+23 dBm) into a 50 Ω load. The transmitter supports OOK and ASK modulation with selectable modulation depth. TRF7962A includes a data transmission engine that supports low-level encoding for ISO 15693. Transmitted data encoding includes automatically generated SOF, EOF, CRC, and parity bits. Several integrated voltage regulators ensure adequate power supply noise rejection for the complete reader system. The built-in programmable auxiliary voltage regulator VDD_X (pin 32) provides up to 20 mA of power for the microcontroller and additional external circuitry within the reader system.

Features

• Fully integrated protocol handling for ISO15693 and ISO18000-3
• Input voltage range: 2.7VDC to 5.5VDC
• Programmable output power: +20 dBm (100 mW) or ±23 dBm (200mW)
• Programmable I/O voltage level: 1.8 VDC to 5.5 VDC
• Programmable system clock frequency output (RF, RF/2, RF/4)
• Programmable modulation depth
• Dual receiver architecture with RSSI for "read hole" elimination and adjacent reader system/in-band noise detection
• Programmable power modes for ultra-low-power system design (< 0.5µA at power-down)
• Parallel or SPI interface
• Integrated voltage regulator for MCU power supply
• Temperature range: -25°C to 85°C
• 32-pin QFN package (5mm x 5mm) (RHB)

Applications

• Product Certification
• Access Control
• Digital Door Locks
• Library Management
• Medical Systems
• Remote Sensing Applications