EM4094

Analog Front End Integrated Circuit for 13.56MHz RFID Base Station

Description

The EM4094 is an analogue front end for 13.56MHz RFID reader systems. It is highly versatile so it can be used in different reader systems having sub carrier frequencies from 212kHz to 848kHz, hence covering ISO14443 and ISO15693 standards.  The adaptability is achieved using a 3 wire serial interface to program the system option bits. The transmitter generates 200mW output power into 50Ω load and is capable of OOK or ASK modulation

Features

- ISO15693 & ISO14443 type A standard compatibility

- Optionally ISO14443 type B compliant

- 3.3V or  5V Power Supply (analogue and digital)

- Antenna driver using OOK modulation, single or double antenna drivers

- Optionally ASK uplink modulation index adjustable from 7% up to 30%

- High output RF power of 200mW from 5V supply

- Antenna short circuit protection

- Multiple receiver inputs for high communication reliability

- 848KHz BPSK internal decoder (ISO14443 type B option only) 

- Multiple sub-carrier receiving compatibility (212kHz, 424kHz and 848kHz) 

- Multiple sub-carrier coding compatibility (Manchester, Miller, BPSK)

- Built-in receive low-pass filter which cut-off frequencies are selectable between 400kHz and 1MHz

- Built-in receive high-pass filter cut-off frequency selectable between 100kHz, 200kHz and 300kHz

- Selectable receive gain from 0dB up to 40dB

- Serial 3 pins interface for option selection

- Power down mode controlled by the 3 wires SPI

- Output Power: 200mW for SO20w and TSSOP-20, 100mW for SO16w and TSSOP16

- Operation temperature range -40°C to +85°C

Applications

- Low cost reader modules

- Hand held reader