PRELIMINARY

EMMICROELECTRONIC-MARINSA

P4022

1

Multi Frequency Contactless Identification Device

Anti-Collision compatible with BTG's Supertag Category Protocols

Features

n

Implements all BTG anti-collision protocols:

Fast SWITCH-OFF and SLOW-DOWN, and

FREE-RUNNING

n

Can be used to implement low frequency

inductive

coupled

transponders,

high

frequency RF coupled transponders or bi-

frequency transponders

n

Factory programmed 64 bit ID number

n

Eight data rate options: 0.5 kbit/s to 64 kbit/s

n

Eight maximum random delay options

n

Two data encoding options

n

Any field frequency: Typically 100 kHz,

13.5 MHz inductive and 100 MHz to 2.54 GHz

RF

n

Data

transmission

done

by

amplitude

modulation

n

110 pF on-chip resonant capacitor

n

On-chip rectifier and voltage limiter

n

On-chip oscillator

n

Low voltage operation - down to 1 V

n

Low power consumption

n

Description

The P4022 chip implements patented anti-

collision protocols for both high frequency and low

frequency applications.

It is even possible to

identify transponders with identical codes, thereby

making it possible to count identical items. The

chip is typically used in “passive” transponder

applications, i.e. it does not require a battery

power source. Instead, it is powered up by an

electromagnetic energy field or beam transmitted

by the reader, which is received and rectified to

generate a supply voltage for the chip.

A pre-

programmed code is transmitted to the reader by

varying the amount of energy that is reflected

back to the reader. This is done by modulating an

antenna or coil, thereby effectively varying the

load seen by the reader.

Low

frequency applications are those applications

that can make use of the on-chip full wave

rectifier bridge to rectify the incident energy.

These

are

typically

applications

that

use

inductive coupling to transmit energy to the chip.

The carrier frequency is typically less than 500

kHz.

The design of the on-chip rectifier and

resonance capacitor is optimized for frequencies

in the order of 125 kHz.

Low frequency

transponders can be implemented using just a

P4022 chip and an external coil that resonates

with the on-chip tuning capacitor at the required

carrier frequency.

An external power storage

capacitor can be added to improve reading

range.

Low

frequency

inductive

coupled

applications

typically

have

lower

reading

distances and lower data rates (4 kbit/s or 8 kbit/s

@ 125 kHz). Reading rates of 30 transponders per

second at 4 kbit/s can be attained.

High

frequency

applications

are

those

applications that cannot make use of the on-chip

rectifier to rectify the incident energy. Instead,

external microwave Schottky diodes are required

to rectify the carrier wave.

These are typically

applications

that

use

electromagnetic

RF

coupling to transmit energy to the chip using

carrier frequencies greater than 100 MHz.

High

frequency transponders can be implemented

using a P4022 chip, one to three microwave

diodes and a printed antenna. An external power

storage capacitor can be added to improve

reading range.

High frequency RF coupled

applications

typically

have

higher

reading

distances (> 4 m) and higher data rates (64 kbit/s).

Reading rates of 480 transponders per second at

64 kbit/s can be attained.

It is also possible to implement transponders that

work in both high and low frequency applications

(bi-frequency transponders).

Applications

n

Access control

n

Asset control

n

Licensing

n

Auto-tolling

n

Animal tagging

n

Sports event timing

n

Electronic keys