The EM4095 from EM Microelectronic is an RFID Transceiver IC for 125 kHz Base Stations. It has an integrated PLL system to achieve self-adaptive carrier frequency to antenna resonant frequency. It can be used to drive the antenna with carrier frequency, AM modulation of the field for the writable transponder, AM demodulation of the antenna signal modulation induced by the transponder, and to communicate with a microprocessor via simple interface.
The Transceiver IC has an integrated PLL system to achieve self-adaptive carrier frequency to antenna resonant frequency. No external quartz is required. It has a carrier frequency range from 100 to 150 kHz. The EM4095 requires a DC supply of 5 V (USB compatible) and consumes 1 µA of current in sleep mode. It is available in a surface-mount plastic package and is suitable for use in car immobilizers, hand-held readers, and low-cost readers.
