Contents
Which is an example of a BGA footprint?
Example BGA Footprint BGA ICs have a wide variety of pin counts ranging from 4 to over 1000 and are typically arranged in an evenly spaced grid of rows and columns. The image below shows an example footprint of a 64 pin BGA arranged in an 8 x 8 pattern with a pitch of 0.8 mm.
How big is the footprint of a 64 pin BGA?
The image below shows an example footprint of a 64 pin BGA arranged in an 8 x 8 pattern with a pitch of 0.8 mm. The nominal ball diameter that should used with this footprint is 0.4 mm. NSMD (Non solder mask defined) pads have been chosen for each landing.
How are the dimensions of a BGA determined?
Pitch – The spacing between two adjacent balls. Typically the pitch is the same in the x and y directions. These dimensions will determine the properties of our layout, including minimum trace width, via styles, and required layer count. BGAs come in a variety of ball diameters and pitch configurations.
Why are ball grid array ( BGA ) packaging used?
BGA packaging can be used for high-performance applications with high thermal and electrical re- quirements. BGAs fit ICs into a smaller footprint, decreasing pitch spacing, by utilizing an array of solder ball connections. This allows for a higher density of I/O connections than that of conventional QFPs or PGAs.
How to create a custom footprint in Eagle?
Create custom footprint on EAGLE Step-1 . To create a package, click on “Add Package”. It will ask the name of the package and open a schematic window. Step-2 . First thing you need to change the size of the grid. For that, click on the GRID icon. Change the size of Grid,… Step-3 . From the above
How to calculate the distance between two BGA pads?
Calculating the distance between two pads in the x or y direction is as simple as subtracting the diameter of a pad from the pitch. Since the pitch of our example BGA is 0.8mm and the pad diameter is 0.32 (remember we’re using NSMD pads, so the pads are 20% smaller than the ball diameter) the spacing between two pads is 0.48mm or 18.9 mils.