AWT6635
HELP3DCTM
TheꢀAWT6635ꢀpowerꢀamplifierꢀmoduleꢀisꢀbasedꢀonꢀ
ANADIGICS proprietary HELP3DC™ technology.
TheꢀPAꢀisꢀdesignedꢀtoꢀoperateꢀupꢀtoꢀ17ꢀdBmꢀinꢀtheꢀlowꢀ
powerꢀmode,ꢀthusꢀeliminatingꢀtheꢀneedꢀforꢀthreeꢀgainꢀ
state,ꢀ whileꢀ stillꢀ maintainingꢀ lowꢀ quiescentꢀ currentꢀ
andꢀhighꢀefficiencyꢀinꢀlowꢀandꢀmediumꢀpowerꢀlevels.ꢀ
Averageꢀ weightedꢀ efficiencyꢀ canꢀ beꢀ increasedꢀ byꢀ
usingꢀanꢀexternalꢀswitchꢀmodeꢀpowerꢀsupplyꢀ(SMPS)ꢀ
orꢀDC/DCꢀconverterꢀtoꢀreduceꢀVCC.
voltageꢀ source.ꢀ Theꢀ PAꢀ isꢀ turnꢀ on/offꢀ isꢀ controlledꢀ
by VENꢀpin.ꢀAꢀsingleꢀVMODE control logic (VMODE1)ꢀisꢀ
neededꢀtoꢀoperateꢀthisꢀdevice.
AWT6635ꢀ requiresꢀ onlyꢀ twoꢀ calibrationꢀ sweepsꢀ forꢀ
systemꢀcalibration,ꢀthusꢀsavingꢀcalibrationꢀtime.ꢀ
Figureꢀ11ꢀshowsꢀoneꢀapplicationꢀexampleꢀonꢀmobileꢀ
board.ꢀC1ꢀandꢀC2ꢀareꢀRFꢀbypassꢀcapsꢀandꢀshouldꢀ
beꢀ placedꢀ nearbyꢀ pinꢀ 1ꢀ andꢀ pinꢀ 10.ꢀ Bypassꢀ capsꢀ
C4ꢀandꢀC5ꢀmayꢀnotꢀbeꢀneeded.ꢀAlsoꢀaꢀ“T”ꢀmatchingꢀ
topologyꢀ isꢀ recommendedꢀ atꢀ PAꢀ RFINꢀ andꢀ RFOUT
portsꢀtoꢀprovideꢀmatchingꢀbetweenꢀinputꢀTXꢀFilterꢀandꢀ
Duplexerꢀ/ꢀIsolator.
Theꢀdirectionalꢀ“daisyꢀchainable”ꢀcouplerꢀisꢀintegratedꢀ
withinꢀtheꢀPAꢀmodule,ꢀthereforeꢀthereꢀisꢀnoꢀneedꢀforꢀ
externalꢀcouplers.
TheꢀAWT6635ꢀ hasꢀ anꢀ integratedꢀ voltageꢀ regulator,ꢀ
whichꢀ eliminatesꢀ theꢀ needꢀ forꢀ anꢀ externalꢀ constantꢀ
SMPS
VBATT
C6
C1
C2
C3
GND
at slug
GND
GND
GND
GND
RFOUT
VCC
RFOUT
VBATT
RFIN
RFIN
TX filter
Duplexer
Input
Matching
Output
Matching
VMODE2
CPLIN
50Ω
VMODE1
VEN
GND
CPLOUT
C5
GND
GND
BB
To
Detector
PA_R0
PA_0N
C4
GND
Figure 12: Typical Application Circuit
10
PRELIMINARY DATASHEET - Rev 1.3
02/2012
ANADIGICS [ ANADIGICS, INC ]
