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Non-Solder Mask Defined Pad dimensions for BGA package

Category: Hardware
Product Number: ADSP-21569


in the datasheet of the ADSP-21569 in the BC-400-3 package is only a recommendation for Solder Mask Defined pads.

Can you also give a recommendation for a Non-Solder Mask Defined Pad please?

A Pad diameter of 0.5mm sounds a little bit too big for me as that would require a trace width of 100um or smaller to route traces between two pads on the same layer.

Best regards,