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EM4122 Datasheet, PDF (1/1 Pages) EM Microelectronic - MARIN SA – Read-only UHF RFID IC | |||
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EM MICROELECTRONIC - MARIN SA
Read-only UHF RFID IC
EM4122
Description
The chip is used in passive UHF read-only transponder
applications. It is powered up by an RF 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. It implements a
robust and fast anti-collision protocol. The chip is
frequency independent and can be used for RF coupled
applications where reading ranges in excess of 10 m and
reading rates of 120 tags per second at 256 kbit/s can be
attained.
The chip is backscattering data using load modulation.
Therefore the reader should be able to detect ASK and
PSK modulated carrier.
Typical Applications
The chip is ideal for applications where long range,
high-speed item identification is required:
 Supply chain management
 Tracking and tracing
 Access control
 Asset control
 Licensing
 Auto-tolling
 Animal tagging
 Sports event timing
Features
 Factory programmed 64 bit ID number
 High data rate: Up to 256 kbit/s
 Frequency independent: Typically used at 869
MHz, 902 - 960 MHz (versions 001 to 099),
2.45 GHz (versions 101 to 199)
 On-chip oscillator
 On-chip rectifier
 Low voltage operation - down to 1.0 V at
ambient temperature
 Low power consumption
 Low cost
 -40° to +85° C operating temperature range
Benefits
 Anti-collision suited to flux monitoring
 Very low consumption
 High backscatter amplitude
 Designed for ease of antenna attachment
Typical Operating Configuration
A
EM4122
Vss
Fig. 1
UHF transponders can be implemented using an
EM4122 chip and an open dipole antenna.
Copyright © 2005, EM Microelectronic-Marin SA
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www.emmicroelectronic.com
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