AC530 Fastrax, AC530 Datasheet - Page 26

• Manufacturer Part Number: AC530
• Description: GPS Development Tools Application Board for UC530
• Manufacturer: Fastrax

Specifications of AC530

• Rohs: yes
• Product: Application Boards
• Tool Is For Evaluation Of: UC530
• Frequency: 1.575 GHz
• Operating Supply Voltage: 3.3 V
• Interface Type: UART
• Description/function: Fastrax Application Board AC530 provides the UC530 connectivity to the Fastrax Evaluation Kit or to other evaluation purposes
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Current: 25 mA

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and which is controlled by the WAKEUP signal. The Q1 provides also short circuit protection and limits bias current
to 50… 60 mA typ.
WAKEUP signal can be used to drive external antenna bias ANT_BIAS (+3.3 V typ.) voltage switch (Q1) during Full
Power/Standby/Backup Modes. L1 and C5 provide RF decoupling at VDD_ANT supply.
Keep RF signal traces to J1 short in order to minimize losses and keep transmission line impedance at 50 ohm, see
next chapter.
Figure 12 Reference circuit diagram, external antenna connectivity
7.3
PCB layout suggestion
The suggested 4-layer PCB build up is presented in the following table.
2012-05-03
UC530_Datasheet