EM4095

Read/Write analog front end for 125 kHz RFID Basestation

Description

The EM4095 (previously named P4095) chip is a CMOS integrated transceiver circuit intended for use in an RFID basestation to perform the following functions: I antenna driving with carrier frequency I AM modulation of the field for writable transponder I AM demodulation of the antenna signal modulation induced by the transponder communicate with a microprocessor via simple interface.

Features 

- Integrated PLL system to achieve self adaptive carrier frequency to antenna resonant frequency I No external quartz required

- 100 to 150 kHz carrier frequency range

- Direct antenna driving using bridge drivers

- Data transmission by OOK (100% Amplitude Modulation) using bridge driver

- Data transmission by Amplitude Modulation with externally adjustable modulation index using single ended driver

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

- Sleep mode 1μA

- USB compatible power supply range

- -40 to +85°C temperature range

- Small outline plastic package SO16

Applications 

- Car immobiliser

- Hand held reader

- Low cost reader