Data Sheet

Bluetooth AudioModule
ShenzhenTTKTechnologyCO.,LTD
TEL
：
0755-89484041 FAX
：
0755-89484040
15
.16
6.0 LayoutGuidelines
6.0.1 AudioLayout
Routeaudiolinesasdifferentialpairs.Thepositiveandnegativesignals
shouldrunparallelandclosetoeachotheruntiltheyareconvertedtosingle-ended
signals.Usededicatedaudiogroundplaneforentireaudiosection.
6.0.2 AntennaDesign
DonotplaceGNDplaneoranymetaldirectlyundertheantennaof
BTM-35.Toavoidanyexcessparasiticcapacitanceintheantennafeedlinecausedby
theRFtestpinonthebottomsideofthemodule,theareaunderneaththeRFtestpin
shouldalsobeleftfreefromcopper.Anymetalincloseproximityoftheantennawill
haveaneffectontheantennaperformance.Thusanymetalshouldbeplacedasfar
fromtheantennaaspossible.ThemoduleshouldbeplacedtoanedgeofthePCB.
BTM-35