EM4222
Description
The EM4222 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 preprogrammed 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 is to be used for RF coupled applications. A reading range from 2m to 20m and reading rates up to 120 tags/second can be achieved, depending upon the system configuration. The Tag Talk First (TTF) protocol enables very simple reader implementation.
Features
Factory programmed 64 bit unique ID number High data rate: Up to 256 kbit/s Frequency independent: Typically used at 869 MHz, 902
- 928 MHz, 2.45 GHz On-chip oscillator On-chip rectifier Low voltage operation
- down to 1.0 V Low power consumption Cost effective -40 to +85°C operating temperature range...
