Integration Guide
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O5K-SCR2_Integration_Guide - 000104.doc
1.2 Interfaces
The main communication Interface to the Host system is USB 2.0. Make sure that
requirements made by the USB-Standard are considered.
1.3 Environmental conditions
Temperature:
• Operating temperature: -25 to +60°C
• Storage temperature: -30 to +60°C
Humidity:
• 5% to 95% not condensing.
The module is sensitive to ESD. Take care while handling these modules.
2 Power supply
Supply voltage for digital circuits: 3.3V +/-5%.
Make sure the voltage is accurate. Good filter practice has to be used.
RF Supply voltage: 5V +/-5%.
Make sure the voltage is accurate. Good filter practice has to be used.
RFID systems require a very high level supply quality. Use linear regulators with high
precision and high control speed whenever possible. When using switching power supplies
make sure the switching speed is above 500 kHz and use an EMC optimized layout as well as
shielded inductors.
The voltage for digital circuits should be applied first.
Current consumption:
Max. 300mA at 3.3V.
Max. 800mA at 5V.
3 Antennas
There are two RF paths with different antenna connectors. That ensures the right connections
for antenna installation.
Antennas made by the grantee used for this certification are the only Antennas which should
be used in combination with the device.
The antenna of the module should not be removed, replaced nor modified. The antenna must
not be co-located or operating in conjunction with any other antenna or transmitter within
20cm. No other antenna than the ones from the certification must be used.