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Número de pieza	EM4102
Descripción	Read Only Contactless Identification Device
Fabricantes	EM MICROELECTRONIC
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No Preview Available ! R EM MICROELECTRONIC - MARIN SA EM4102 Read Only Contactless Identification Device Description The EM4102 (previously named H4102) is a CMOS integrated circuit for use in electronic Read Only RF Transponders. The circuit is powered by an external coil placed in an electromagnetic field, and gets its master clock from the same field via one of the coil terminals. By turning on and off the modulation current, the chip will send back the 64 bits of information contained in a factor 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 EM4102 has several metal options which are used to define the code type and data rate. Data rates of 64, 32 and 16 periods of carrier frequency per data bit are available. Data can be coded as Manchester, Biphase or PSK. Due to low power consumption of the logic core, no supply buffer capacitor is required. Only an external coil is needed to obtain the chip function. A parallel resonance capacitor of 78 pF is also integrated. Features □ 64 bit memory array laser programmable □ Several options of data rate and coding available □ On chip resonance capacitor □ On chip supply buffer capacitor □ On chip voltage limiter □ Full wave rectifier on chip □ Large modulation depth due to a low impedance modulation device □ Operating frequency 100 - 150 kHz □ Very small chip size convenient for implantation □ Very low power consumption Applications □ Animal implantable transponder □ Animal ear tag □ Industrial transponder Typical Operating Configuration Coil1 EM4102 Coil2 L: typical 20.8mH for fo = 125kHz Fig. 1 Pin Assignment VSS EM4102 VDD COIL2 COIL1 COIL1 COIL2 Coil terminal / Clock input Coil terminal Fig. 2 Copyright © 2005, EM Microelectronic-Marin SA 1 www.emmicroelectronic.com 1 page R Memory Array for PSK encoding ICs The PSK coded IC's are programmed with odd parity for P0 and P1 and always with a logic zero. The parity bits from P2 to P9 are even. The column parity PC0 to PC3 are calculated including the version bits and are even parity bits. Code Description Manchester There is always a transition from ON to OFF or from OFF to ON in the middle of bit period. At the transition from logic bit “1” to logic bit “0” or logic bit “0” to logic bit “1” the phase change. Value high of data stream presented below modulator switch OFF, low represents switch ON (see Fig. 6). EM4102 Biphase Code At the beginning of each bit, a transition will occur. A logic bit “1” will keep its state for the whole bit duration and a logic bit “0” will show a transition in the middle of the bit duration (see Fig. 7). PSK Code Modulation switch goes ON and OFF alternately every period of carrier frequency. When a phase shift occurs, a logical "0" is read from the memory. If no shift phase occurs after a data rate cycle, a logical "1" is read (see Fig. 8). Manchester Code Binary data Memory output X1 1 1 1 1 1 1 1 1 0 1 0 1 0 0 0 1 1 0 Modulator control Modulation control "low" means high current Biphase Code Binary data Memory output 01 1 0 1 0 0 1 Modulator control PSK Code Modulation control "low" means high current Fig. 6 Fig. 7 Serial Data Out COIL1 Modulator control "0" ON SERIAL OUT "1" ON SERIAL OUT Modulation control "low" means high current Fig. 8 Copyright © 2005, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com 5 Page

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Número de pieza	Descripción	Fabricantes
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