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AM4376: Land diameter on PCB

Part Number: AM4376
Other Parts Discussed in Thread: TMDXSK437X

Hi Team,

I am designing a board using AM4376BZDND30S. 

My reference to this Design is: TMDXSK437X (AM437x Starter Kit)

My query is in regard to land pattern for AM4376BZDND30S.

In Starter Kit: 

The pad stack for AM437x is 0.2799mm (Land Area to solder)

While referring TI Document - "SPRAA99C – MARCH 2008 – REVISED MAY 2021;  Application Report nFBGA Packaging"

https://www.ti.com/lit/an/spraa99c/spraa99c.pdf?ts=1645328545870&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FAM4376

Page 7; Table 2-1

Optimum Land configuration is 0.35mm.

Q1: Pls suggest which land area (pad size) to follow. 

Q2: What should be the minimum air gap that can be between pad and trace. (this will help me decide on the trace width).

Regards,

Siddharth Gupta