HTSICH4801EW/V1,00 NXP Semiconductors, HTSICH4801EW/V1,00 Datasheet - Page 11

• Manufacturer Part Number: HTSICH4801EW/V1,00
• Description: RFID Modules & Development Tools Transponder Wafer
• Manufacturer: NXP Semiconductors

Specifications of HTSICH4801EW/V1,00

• Operating Temp Range: -25C to 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935282034005

Philips Semiconductors
Product Specification Revision 3.1 2006 July 18
HITAG S
HTS IC H32/HTS IC H56/HTS IC H48
7.2
Energy Transmission
Passive transponders must somehow be supplied with energy to be able to operate. In the HITAG System, this is
achieved by using the principle of a loose coupled transformer:
Transponder
RWD
Antenna
Antenna
M
Energy
Data
Fig.4 Loose coupled transformer.
The RWD antenna generates a magnetic field. Some of the generated magnetic flux flows through the transponder
antenna and induces a voltage there. The voltage drives a current and the transponder will start operating. As this current
will be very small when the transponder is far away from the antenna, the HITAG S Transponder IC is designed for low
power consumption.
The principle of a loose coupled transformer enables also a bi-directional data transmission.
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