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 50Ω 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 -40°C to +85°C

Applications
❐ Low cost reader solution
❐ Hand held reader