Smart Machine Smart Decision
30
transients
Analog output
Coplanar ground fill on both sides (of traces or pair as appropriate); in between ground planes – grounds
above and below
Isolate from noise sources such as antenna, RF signals, SMPS, clocks, and other digital signals with fast
transients.
EAR output signal – route as differential pair with 10 mil trace widths.
SPK output signals – route as differential pair with 20 mil trace widths with 8
Ω load and 25 mil trace widths
with 4
Ω load
HPH output signals – not a differential pair; 10 mil trace widths for HPH_L and HPH_R; 15 mil trace widths
for HPH_GND
Connect HPH_GND to the ground pin of the jack connector and route HPH_GND in between HPH_L and
HPH_R for best crosstalk minimization
