AWT6638
APPLICATION INFORMATION
Toꢀ ensureꢀproperꢀperformance,ꢀ referꢀ toꢀ allꢀ relatedꢀ logicꢀlevelꢀ(seeꢀOperatingꢀRangesꢀtable)ꢀtoꢀVMODE1
.
Applicationꢀ Notesꢀ onꢀ theꢀANADIGICSꢀ webꢀ site:ꢀ TheꢀBiasꢀControlꢀtableꢀlistsꢀtheꢀrecommendedꢀmodesꢀ
http://www.anadigics.com
ofꢀoperationꢀforꢀvariousꢀapplications.ꢀVMODE2ꢀisꢀnotꢀ
necessaryꢀforꢀthisꢀPA.
Shutdown Mode
Theꢀpowerꢀamplifierꢀmayꢀbeꢀplacedꢀinꢀaꢀshutdownꢀ Twoꢀoperatingꢀmodesꢀareꢀavailableꢀtoꢀoptimizeꢀcurrentꢀ
modeꢀ byꢀ applyingꢀ logicꢀ lowꢀ levelsꢀ (seeꢀ Operatingꢀ consumption.ꢀHighꢀBias/HighꢀPowerꢀoperatingꢀmodeꢀ
Rangesꢀtable)ꢀtoꢀtheꢀVENABLE and VMODE1ꢀvoltages.
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
VEN
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 6: Bias Control (UMTS)
POUT
LEVELS
BIAS
MDOE
APPLICATION
V
ENABLE
V
MODE1
V
CC
V
BATT
Highꢀpower
(HighꢀBiasꢀMode)
>ꢀ+16ꢀdBm
High
+1.8 V
0ꢀV
1.5ꢀ-ꢀ4.35ꢀV
> 3.1 V
Med/lowꢀpower
(LowꢀBiasꢀMode)
+17 dBm
Low
+1.8 V
+1.8 V
0.5ꢀ-ꢀ4.35ꢀꢀV
0.5ꢀ-ꢀ4.35ꢀV
> 3.1 V
> 3.1 V
Shutdown
-
Shutdown
0ꢀV
0ꢀV
PRELIMINARY DATA SHEET - Rev 1.3
7
02/2012
ANADIGICS [ ANADIGICS, INC ]
