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