AWT6635
APPLICATION INFORMATION
Toꢀ ensureꢀproperꢀperformance,ꢀ referꢀ toꢀ allꢀ relatedꢀ
Applicationꢀ Notesꢀ onꢀ theꢀANADIGICSꢀ webꢀ site:ꢀ
http://www.anadigics.com
logicꢀlevelꢀ(seeꢀOperatingꢀRangesꢀtable)ꢀtoꢀVMODE1
.
TheꢀBiasꢀControlꢀtableꢀlistsꢀtheꢀrecommendedꢀmodesꢀ
ofꢀoperationꢀforꢀvariousꢀapplications.ꢀVMODE2ꢀisꢀnotꢀ
necessaryꢀforꢀthisꢀPA.
Shutdown Mode
Theꢀpowerꢀamplifierꢀmayꢀbeꢀplacedꢀinꢀaꢀshutdownꢀ
modeꢀ byꢀ applyingꢀ logicꢀ lowꢀ levelsꢀ (seeꢀ Operatingꢀ
Rangesꢀtable)ꢀtoꢀtheꢀVENABLE and VMODE1ꢀvoltages.
Twoꢀoperatingꢀmodesꢀareꢀavailableꢀtoꢀoptimizeꢀcurrentꢀ
consumption.ꢀHighꢀBias/HighꢀPowerꢀoperatingꢀmodeꢀ
isꢀforꢀPOUTꢀlevelsꢀ>ꢀ16ꢀdBm.ꢀAtꢀaroundꢀ17ꢀdBmꢀoutputꢀ
power,ꢀtheꢀPAꢀcanꢀbeꢀ“ModeꢀSwitched”ꢀtoꢀLowꢀpowerꢀ
modeꢀforꢀlowestꢀquiescentꢀcurrentꢀconsumption.
Bias Modes
TheꢀpowerꢀamplifierꢀmayꢀbeꢀplacedꢀinꢀeitherꢀaꢀLowꢀBiasꢀ
modeꢀorꢀaꢀHighꢀBiasꢀmodeꢀbyꢀapplyingꢀtheꢀappropriateꢀ
Vcontrols
Venable/Vmode(s)
Rise/Fall Max 1µS
Defined at 10% to 90%
of Min/Max Voltage
On Sequence Start
T_0N=0µ
Off Sequence Start
T_0FF=0µ
ON Sequence
OFF Sequence
RFIN
notes 1,2
V
EN
VCC
note 1
T_0N+1µS
T_0N+3µS
T_0FF+2µS T_0FF+3µS
Referenced After 90%of Rise
Time
Referenced Before10%of Fall
Time
Figureꢀ9:ꢀRecommendedꢀON/OFFꢀTimingꢀSequence
Notes:
(1) Level might be changed after RF is ON.
(2) RF OFF defined as PIN ≤ -30 dBm.
(3) Switching simultaneously between VMODE and VEN is not recommended.
Table 7: Bias Control
P
OUT
BIAS
MODE
APPLICATION
V
ENABLE
V
MODE1
V
CC
V
BATT
LEVELS
Highꢀpower
(HighꢀBiasꢀMode)
>ꢀ+16ꢀdBm
High
+1.8ꢀV
0ꢀV
1.5ꢀ-ꢀ4.35ꢀV
>ꢀ3.1ꢀV
Med/lowꢀpower
(LowꢀBiasꢀMode)
+17ꢀdBm
Low
+1.8ꢀV
0ꢀV
+1.8ꢀV
0ꢀV
0.5ꢀ-ꢀ4.35ꢀV
0.5ꢀ-ꢀ4.35ꢀV
>ꢀ3.1ꢀV
>ꢀ3.1ꢀV
Shutdown
-
Shutdown
8
PRELIMINARY DATASHEET - Rev 1.3
02/2012
ANADIGICS [ ANADIGICS, INC ]
