AS3992 UHF RFID Reader IC

描述

The AS3992 UHF Gen 2 Reader chip is an integrated analog frontend and provides protocol handling for ISO18000-6b/c 900MHz RFID reader systems. Equipped with multiple built-in programming options, the device is suitable for a wide range of UHF RFID applications.

The AS3992 is pin to pin compatible with the previous AS3990/91 IC's. It offers improved receive sensitivity to -86dB, fully programmable Rx DRM filters on chip and pre-distortion. Fully scalable, the AS3992 is ideal for longer range and higher power applications.

Offering DRM compliance 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.

主要特征

• ISO18000-6C (EPC Gen2) full protocol support
• ISO18000-6A,B compatibility in direct mode
• Full DRM compliance on chip allowing a true World Wide Shippable device
• Improved receive sensitivity to -86dBm
• On chip pre-distortion meaning improved external PA efficiency
• Integrated low level transmission coding, Integrated low level decoders
• Integrated data framing, Integrated CRC checking
• 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
• 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
• Built-in reception low-pass and high-pass filters having selectable corner frequencies
• 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, Can be powered by USB with no need for step conversion

产品应用

• Fixed Readers
• Portals
• Car Access
• Hand held's
• Embeddable

Block diagram for AS3992 UHF RFID Reader IC