HDA Codec Layout Guide

HDA Codec Layout Guide VerHDA Codec Layout Guide
HIGH DEFINITION AUDIO (HDA) CODEC LAYOUT GUIDE Introduction
To ensure maximum performance from the High Definition Audio (HDA) codec, proper component placement and routing are very important. This document includes properly isolating the digital circuitry and analog circuitry, The effects of ground and supply plane geometry, decoupling/bypassing/filtering capacitors placement priorities, LINK signals, analog power supplies, and analog ground planes.

The layout design of Ground and Supply plane Geometry Figure.1 shows a top view layout for onboard HDA codec. The layout separates the analog and digital ground planes with a 60 to 100 mils gap. The moat helps to isolate noisy digital circuitry from quiet analog audio circuitry. The digital and analog ground planes are