H4001

www.DataSheet4U.com ® EM MICROELECTRONIC-MARIN SA READ-ONLY CONTACTLESS IDENTIFICATION DEVICE Features 64 bit memory array laser programmable Wide dynamic range due to on chip buffer capacitance & voltage limiter on chip. Full wave rectifier on chip Big modulation depth due to a low impedance modulation device 50'000 baud reading speed at 3 MHz Very small chip size convenient for implantation Unsensitive close to metal Large distance even without resonance capacitor No external buffer capacitance needed due to low power consumption H4001 Typical Operating Configuration COIL 1 L C H4001 COIL 2 Description The H4001 is a CMOS integrated circuit for use in transponders. The circuit is powered by an external coil placed in a magnetic field, and gets its clock from the same field via one of the coil terminals. The other coil terminal is affected by the modulator, turning on and off the modulation current in order to send back the 64 bits of information contained in a factory pre-programmed memory array. The programming of the chip is performed by laser fusing of polysilicon links in order to store a unique code on each chip. The serial output data string contains a 9 bits header, 40 bits of data, 14 parity bits, and 1 stop bit. COIL 2 Typical value of inductance at 125 KHz is 2 mH The capacitor is adjusted to the resonance Fig. 1 Pin Assignment Due to the low power consumption of the logic core, no supply buffer capacitor is required. Only an external coil is require...