P4022 Datasheet, PDF (1/13 Pages) EM Microelectronic - MARIN SA – Multi Frequency Contactless Identification Device Anti-Collision compatible with BTGs Supertag Category Protocols

PRELIMINARY
EM MICROELECTRONIC-MARIN SA P4022
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 -40 to +85 ^OC temperature range
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
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