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| EM MICROELECTRONIC - MARIN SA EM4094 Analog Front End Integrated Circuit for 13.56MHz RFID Base Station General Description The EM4094 is an integrated analog system for 13.56MHz RFID reader system. It is highly versatile so it can be used in different reader systems having sub-carrier frequencies from 212KHz to 848KHz, hence covering ISO 14443 and ISO 15693 standards. The adaptability is achieved using a 3 wires serial interface to program the system option bits. The transmitter generates 200 mW output power into 50 load and is capable of OOK or ASK modulation. Features ISO 15693 & ISO14443 compatibility Oscillator using 13.56MHz Quartz with selectable transconductance (gm). Antenna driver using OOK or ASK modulation using single antenna driver ASK modulation adjustable in range from 7% to 30% High output power 200mW from 5V supply Antenna short circuit protection Multiple receiver input for high communication reliability AM/PM demodulation with AGC signal amplifier 848KHz BPSK internal decoder (type B) Multiple sub-carrier receiving compatibility (212kHz, 424kHz and 848kHz) Multiple sub-carrier coding compatibility (Manchester, BPSK) Built-in receive low-pass filter cut-off frequency selectable between 400kHz and 1MHz Built-in receive high-pass filter cut-off frequency selectable between 100kHz, 200kHz and 300kHz Selectable receive gain Serial 3 pin interface for option selection Power down mode controlled by the 3 wires SPI Output Power: 200mW for a SO20w Package 100mW for a SO16w Package Operation temperature range -40C to +85C Applications Low cost reader solution Hand held reader Typical Application VCC VDDA1 C10 C8 C7 VSSA1 VSS VDD C12 VCC C11 VCC VDDA2 C9 C6 C5 VSSA2 ANTENNA L1 ANT1 ANT2 C3 RFIN2 RFIN1 OSCOUT C4 Y1 OSCIN EN DIN DCLK DOUT DOUT1 uController Interface AGD C13 EM4094 COAX C1 C2 Figure 1 Copyright 2003, EM Microelectronic-Marin SA Subject to change without notice Rev. A, 09/03 Phone: +41.32.755-5111, Fax: +41.32.755-5403 www.emmicroelectronic.com info@emmicroelectronic.com |
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