AC530 Fastrax, AC530 Datasheet - Page 27

• 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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The UC530 module is intended to be assembled at the top edge of the mother board. The embedded antenna
operation relies on the ground plane on the mother board; optimum size is 80x40mm but larger or smaller ground
plane can be used. Suggested minimum ground plane size is 45x20mm. Optimum placement is at the center of the
top edge but offset placement is allowed by keeping at least 10mm distance to nearest ground plane edge.
Note keepout 4.8x7.2mm under the embedded antenna. Follow also GND via hole suggestive locations.
Routing signals directly under the module should be avoided. This area should be dedicated to keep-out to both
traces and assigned to ground plane (copper plane), except for via holes, which can be placed close to the pad
under the module. If possible, the amount of VIA holes underneath the module should be minimized.
Note that the embedded GPS antenna requires a small ground plane clearance and void area (keep out
4.8x7.2mm) for copper plane & trace for all layers under the antenna. Placement of other components is not
allowed under the keep out on opposite side.
2012-05-03
UC530_Datasheet
Layer
1
2
3
4
Figure 13 Mother board ground plane and UC530 placement
Description
Components + Ground plane (opening under UC530 antenna)
Signals and RF trace (opening under UC530 antenna)
Ground and power planes, signals (opening under UC530 antenna)
Ground plane, also short traces allowed (opening under UC530 antenna)
Table 8 Suggested PCB build up