EVA-7M - Hardware Integration Manual
UBX-12003235 - R05
Production Information
Design-in
Page 19 of 42
2.10.2
Paste mask
The paste mask
shall be 50 µm smaller than the copper pads with a paste thickness of 100 µm.
The paste mask outline needs to be considered when defining the minimal distance to the next
component.
These are recommendations only and not specifications. The exact geometry, distances, stencil thicknesses
and solder paste volumes must be adapted to the specific production processes (e.g. soldering etc.) of the
customer.
2.10.3
Placement
A very important factor in achieving maximum GNSS performance is the placement of the receiver on the PCB.
The connection to the antenna must be as short as possible to avoid jamming into the very sensitive RF section.
Make sure that RF critical circuits are clearly separated from any other digital circuits on the system board. To
achieve this, position the receiver digital part towards your digital section of the system PCB. Care must also be
exercised with placing the receiver in proximity to circuitry that can emit heat. The RF part of the receiver is very
sensitive to temperature and sudden changes can have an adverse impact on performance.
High temperature drift and air vents can affect the GNSS performance. For best performance
avoid high temperature drift and air vents near the module.
2.11
Migration considerations
EVA-7M modules are targeted to be the successor of AMY-6M. However, both modules make use of a different
package. As a consequence a layout for AMY-6M cannot be directly migrated to EVA-7M and must be modified.
EVA-7M modules are not pin-compatible to AMY-6M modules.
2.11.1
C88-7M - Evaluating EVA-7M on existing NEO-xM sockets
The C88-7M GNSS application board is designed for easier evaluation and design-in of u-blox EVA-7M module
in existing NEO based products. The C88-7M integrates the EVA-7M GNSS module into a NEO form factor
adaptor board (i.e. with the same dimensions and pinout as the NEO-6M and NEO-7M). The C88-7M application
board allows straightforward integration of the u-blox EVA-7M in customers’ existing end products based on the
u-blox NEO GNSS modules. It enables fast verification of the EVA-7M functionalities and performances before
the design-in
Schematic of C88-7M is available upon request.
