MIKROE-295

EM4100 Read Only Contactless Identification Device Description Features The EM4100 (previously named H4100) is a CMOS 64 bit memory array laser programmable integrated circuit for use in electronic Read Only RF Several options of data rate and coding available Transponders. The circuit is powered by an external coil On chip resonance capacitor placed in an electromagnetic field, and gets its master On chip supply buffer capacitor clock from the same field via one of the coil terminals. By On chip voltage limiter turning on and off the modulation current, the chip will send Full wave rectifier on chip back the 64 bits of information contained in a factor y pre- Large modulation depth due to a low impedance programmed memory array. modulation device The programming of the chip is performed by laser fusing Operating frequency 100 - 150 kHz of polysilicon links in order to store a unique code on each Very small chip size convenient for implantation chip. Very low power consumption The EM4100 has several metal options which are used to define the code type and data rate. Data rates of 64, 32 Applications and 16 periods of carrier frequency per data bit are Logistics automation available. Data can be coded as Manchester, Biphase or Anticounterfeiting PSK. Access control Due to low power consumption of the logic core, no supply Industrial transponder buffer capacitor is required. Only an external coil is needed to obtain the chip function. A parallel resonance capacitor of 74 pF is also integrated. Typical Operating Configuration Pin Assignment Coil1 VSS VDD EM4100 EM4100 Coil2 COIL2 COIL1 L: typical 21.9mH for fo = 125kHz COIL1 Coil terminal / Clock input COIL2 Coil terminal Fig. 1 Fig. 2 1EM4100 Absolute Maximum Ratings Operating Conditions Parameter Symbol Conditions Parameter Symbol Min. Typ. Max.Units Maximum DC Current forced I 30mA Operating Temp. T -40 +85 C op COIL on COIL1 & COIL2 Maximum Coil I 10 mA COIL Power Supply V -0.3 to 7.5V Current DD Storage Temp. Die form T -55 to +200C AC Voltage on Coil V 3 14* Vpp store coil Storage Temp. PCB form T -55 to +125C store Supply Frequency f 100 150 kHz coil Electrostatic discharge V 1000V ESD *) The AC Voltage on Coil is limited by the on chip voltage maximum to MIL-STD-883C limitation circuitry. This is according to the parameter I in method 3015 coil the absolute maximum ratings. Stresses above these listed maximum ratings may cause permanent damage to the device. Handling Procedures Exposure beyond specified operating conditions max affect This device has built-in protection against high static device reliability or cause malfunction. voltages or electric fields however due to the unique properties of this device, anti-static precautions should be taken as for any other CMOS component. System Principle Transponder Tranceiver Coil1 Antenna Oscillator Driver EM4100 Coil2 Filter and Demodulator Gain Data received Data decoder Signal on coils from transponder Transponder coil Transeiver coil RF Carrier Data Fig. 3 2