The AS3992 UHF Reader chip is an integrated analog front-end and provides protocol handling for ISO180006c/b 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 and firmware compatible with the previous AS3990/91 IC‘s. It offers improved receive sensitivity to -86dB， programmable Rx Dense Reader Mode （DRM） filters on chip and pre-distortion. Fully scalable， the AS3992 is ideal for longer range and higher power applications. Offering DRM filtering 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. The AS3992 complies with EPC Class 1 Generation 2 protocol （ISO 18000-6C） and ISO 18000-6A/B （in direct mode）。 Parallel or serial interface can be selected for communication between the host system （MCU） and the reader IC. When hardware coders and decoders are used for transmission and reception， data is transferred via 24 bytes FIFO register. In case of direct transmission or reception， coders and decoders are bypassed and the host system can service the analog front end in real time. The transmitter generates 20dBm output power into 50Ω load and is capable of ASK or PR-ASK modulation. The integrated supply voltage regulators ensure supply rejection of the complete reader system.