u-blox NEO-8Q Series Hardware Integration Manual

u-blox NEO-8Q Series Hardware Integration Manual Manual pdf 13 page image

NEO-8Q / NEO-M8 - Hardware Integration ManualUBX-15029985 - R04 Production Information DesignPage 13 of 312.2 Minimal designThis is a minimal design for a NEO-8Q and NEO-M8 series GNSS receiver.Figure 4: NEO-8Q / NEO-M8 passive antenna designNEO-M8M can have a passive antenna, but for optimal operation requires an external SAW and LNA, seeFigure 7.2.3 Layout: Footprint and paste maskFigure 5 describes the footprint of the NEO-8Q and NEO-M8 series modules and provides recommendations (notspecifications) for the paste mask Note that the copper and solder masks have the same size and position.To improve the wetting of the half vias, reduce the amount of solder paste under the module and increase thevolume outside of the module by defining the dimensions of the paste mask to form a T-shape (or equivalent)extending beyond the copper mask. For the stencil thickness, see section 4.2.Consider the paste mask outline when defining the minimal distance to the next component. The exactgeometry, distances, stencil thicknesses and solder paste volumes must be adapted to the specificproduction processes (e.g. soldering) of the customer.Stencil: 150 m10.4 mm [409.5 mil]14.6 mm [575 mil]12.2 mm [480 mil]0.8 mm[31.5 mil]0.6 mm[23.5 mil]Figure 5: NEO-8Q and NEO-M8 series paste mask NEO-8Q and NEO-M8 series footprint12.2 mm [480.3 mil]16.0 mm [630 mil]1.0 mm[39.3 mil]0.8 mm[31.5 mil]0.8 mm[31.5 mil]3.0 mm[118.1 mil]1.0 mm[39.3 mil]1.1 mm[43.3 mil]