H4001 EMMICRO | Alldatasheet
Document overview
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Technical content
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
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. Due to the low power consumption of the logic core, no supply buffer capacitor is required. Only an external coil is required to obtain the chip function. A parallel capacitor adjusted with the coil to obtain resonnance, will increase the read distance. READ-ONLY CONTACTLESS IDENTIFICATION DEVICE Pin Assignment Fig. 2
Applications
Serial Number Identification ROM Typical Operating Configuration Fig. 1 COIL 1 COIL 2 COIL 1 COIL 2 coil terminal/ clock input coil terminal/ data transmisssion Typical value of inductance at 125 KHz is 2 mH The capacitor is adjusted to the resonance COIL 2 COIL 1 L C H4001 H4001 EM MICROELECTRONIC-MARIN SA
This device has built-in protection against high static 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. Unless otherwise specified proper operation can only occur when all terminal voltages are kept within the supply voltage range. Unused inputs must always be tied to a defined logic voltage level. 30 mA +200 °C - 55 °C 750 V Table 1 Maximum AC peak current induced on COIL1 and COIL2 Maximum storage temperature Minimum storage temperature Electrostatic discharge maximum to MIL-STD-883C method 3015 Parameter Symbol Condition Icoil Tstoremax Tstoremin VESD VCOIL2 = 0V VCOIL1 = 3.5Vpp Sine Wave Timing Characteristics Table 4 Parameter Symbol Min Typ Max Coil Clock frequency Ratio between coil period and bit period Manchester code PSK fCOIL Rmch Rpsk 50 130 400 Unit kHz Stresses above these listed maximum ratings may cause permanent damage to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction. Operating Conditions Table 2 Operating Temperature AC Supply Voltage Supply Frequency TA Vcoil fcoil +85 400 Vpp KHz Parameter Symbol Min Typ Max Unit -40 3.5 Symbol
Electrical Characteristics
Vcoil = 3.5Vpp ±5% fcoil =130KHz Sine Wave TA = 25°C unless otherwise specified Table 3 Parameter Typ. Max UnitMinTest Conditions Demodulated Voltage Dynamic Current Udemod Idyn VAC µA50 10 KΩ COIL1 COIL2 R 10 nF LM310 1N4148 U DEMOD U COIL U COIL = 3.5 Vpp Manchester PSK : R = 3 KΩ : R = 820Ω 0.25 130 H4001 EM MICROELECTRONIC-MARIN SA
Fig. 3 Timing Waveforms Manchester coded version Fig. 4 PSK version COIL1 Modulation Control "0" ON SERIAL OUT "1" ON SERIAL OUT Serial Data Out Fig. 5 1 2 3 4 5 6 7 8 9 10 11 12 6362 64 1 2 3 Serial Data Out Modulation Control Bit Number MODULATION CONTROL "LOW" MEANS HIGH CURRENT ON COIL2 OCT BIT nSerial Data Out Manchester coded : 64 PSK version : 16 OCT OCT COIL1 BIT n+1 BIT n+2 H4001 EM MICROELECTRONIC-MARIN SA
The AC input induced in the external coil by an incident magnetic field is rectified by a Graetz bridge Memory Array The H4001 contains 64 bits divided in five groups of information. 9 bits are used for the header, 10 row parity bits (P0 - P9), 4 column parity bits (PC0 - PC3), 40 data bits (D00 - D93), and 1 stop bit set to logic 0. The header is composed by the 9 first bits which are mask programmed to 111111111. Due to the data and parity organisation, this sequence can not be reproduced in the data string. The header is followed by 10 groups of 4 data bits and 1 even row parity bit. Then, the last group consists of 4 even column parity bits without row parity bit. Bits D00 to D03 and bits D10 to D13 are customer specific identification. These 64 bits are outputted serially in order to control the modulator used to modify the current at one of the coil terminals. When the 64 bits data string is outputted, the output sequence is repeated continuously until power goes off. Fig. 6 Block Diagram COIL_1 COIL_2 AC1 AC2 FULL WAVE RECTIFIER CLOCK EXTRACTOR SEQUENCER Logic Clock Serial Data out MEMORY ARRAY DATA ENCODER DATA MODULATOR Modulation Control D00 D10 D20 D30 D40 D50 D60 D70 D80 D90 PC0 D01 D11 D21 D31 D41 D51 D61 D71 D81 D91 PC1 D02 D12 D22 D32 D42 D52 D62 D72 D82 D92 PC2 D03 D13 D23 D33 D43 D53 D63 D73 D83 D93 PC3 1 - 9 Bits Header - 4 data bits & associated even row parity bit - 4 column even parity bits, NO row parity bit 111
32 Data Bits
8 Version bits or
EM MICROELECTRONIC-MARIN SA
Two mask programmed versions of logic are available. The first one will modulate the amplitude of the magnetic field with a bit rate corresponding to 64 periods of the field frequency (Manchester coding). The second version is using half of the field frequency to transmit data by shifting the signal phase (PSK coding). One of the coil terminals (COIL1 in Fig.6) is used to generate the clock signal for the logic. The output of the clock extractor drives a sequencer providing all necessary signals to address the Memory Array, and serially output the data. PSK version The serial data output of the Memory array connects the modulation control to the output or inverted output of a flip-flop which input is the signal from the clock extractor. When a logic 0 is output, the modulation control signal is changed to the other output of the flip-flop, and when a logic 1 is output, the modulation control signal remains on the same flip-flop output. Data Modulator The data modulator is controlled by the signal Modulation Control (see above fig. 4 & 5) in order to induce a high current on COIL_2 terminal when this signal is at logic 0. This will affect the magnetic field according to the data stored in the Memory Array.
Ordering Information
The H4001 is available in the following packages DIP 8-pin package Chip form and others on request SO 8-pin package PCB 2 connections EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifica- tions without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more up-to-date version.
Package Information
Fig. 7 4.0 mm 8.0 mm 1.0 mm * Max. thickness depending on utilized capacitor 1206 E M PCB H4001 8P H4001 8S H4001 PCB © 1996 EM Microelectronic-Marin SA 3/96 Rev. E/127 EM Microelectronic-Marin SA CH-2074 Marin, Switzerland,Tel. +41 32 755 51 11, Fax +41 32 755 54 03 H4001 EM MICROELECTRONIC-MARIN SA