READ/WRITE ANALOG FRONT END IC WITH SERIAL μC INTERFACE FOR USAGE IN 125 / 134.2 KHZ RFID BASESTATION APPLICATIONS

Description

The EM4097 (previously named P4097) chip is a CMOS integrated transceiver circuit intended for use in an RFID basestation to perform the following functions:

Antenna driving with carrier frequency to transfer energy to the transponder

Data transfer to writable transponder by amplitude modulation (ASK) of the field ( modulation ratio, called OOK, “on"-“off" keying)

Data transfer from transponder by amplitude- or phase demodulation (ASK or PSK)

μC Interface to communicate with a microprocessor

Features

- Integrated PLL system to achieve self adaptive carrier frequency to antenna resonant frequency I Chip can be forced to run with external clock, division ratio 32

- 100kHz to 150kHz carrier frequency range

- Direct antenna driving using bridge driver

- Data transmission by OOK ( Amplitude Modulation) using bridge driver

- Multiple transponder protocol compatibility, (Ex.: EM4102, EM4200, EM4450 and EM4205/EM4305)

- Two sampling points for demodulation, allowing extended system tolerances

- Serial μC interface for diagnosis and status control

- Very low sleep mode current consumption of 1μA typically

- USB compatible power supply range

- -40 to +85°C automotive temperature range

- Small outline plastic package SO16

Applications

- Animal ID reader

- Hａnd held Low Frequency reader