AWT6622
APPLICATION INFORMATION
Toꢀ ensureꢀproperꢀperformance,ꢀ referꢀ toꢀ allꢀ relatedꢀ to the VMODEꢀvoltages.ꢀTheꢀBiasꢀControlꢀtableꢀbelowꢀ
Applicationꢀ Notesꢀ onꢀ theꢀANADIGICSꢀ webꢀ site:ꢀ listsꢀtheꢀrecommendedꢀmodesꢀofꢀoperationꢀforꢀvariousꢀ
http://www.anadigics.com
applications.
Shutdown Mode
Threeꢀoperatingꢀmodesꢀareꢀrecommendedꢀtoꢀoptimizeꢀ
Theꢀpowerꢀamplifierꢀmayꢀbeꢀplacedꢀinꢀaꢀshutdownꢀmodeꢀ currentꢀconsumption.ꢀHighꢀBias/HighꢀPowerꢀoperatingꢀ
byꢀapplyingꢀlogicꢀlowꢀlevelsꢀ(seeꢀOperatingꢀRangesꢀ modeꢀisꢀforꢀPOUTꢀlevelsꢀ> 17 dBm. At ~17dBm - 7
table)ꢀtoꢀtheꢀVEN, VMODE1 and VMODE2 voltages.
dBm,ꢀtheꢀPAꢀshouldꢀbeꢀ“ModeꢀSwitched”ꢀtoꢀMediumꢀ
PowerꢀMode.ꢀForꢀPOUTꢀlevelsꢀ<ꢀ~8ꢀdBm,ꢀtheꢀPAꢀcanꢀbeꢀ
switchedꢀtoꢀLowꢀPowerꢀModeꢀforꢀevenꢀlowerꢀquiescentꢀ
currentꢀconsumption.
Bias Modes
TheꢀpowerꢀamplifierꢀmayꢀbeꢀplacedꢀinꢀeitherꢀLow,ꢀ
Mediumꢀ orꢀ Highꢀ Biasꢀ modesꢀ byꢀ applyingꢀ theꢀ
appropriateꢀlogicꢀlevelꢀ(seeꢀOperatingꢀRangesꢀtable)ꢀ
Table 6: Bias Control
P
OUT
BIAS
MODE
APPLICATION
LEVELS
(Rel.ꢀ99)
V
EN
V
MODE1
V
MODE2
V
CC
V
BATT
Lowꢀpower
(LowꢀBiasꢀMode)
< +8 dBm
Low
Low
+1.8 V +1.8 V +1.8 V
3.2ꢀ-ꢀ4.2ꢀV
3.2ꢀ-ꢀ4.2ꢀV
>ꢀ3.2ꢀV
>ꢀ3.2ꢀV
Medꢀpower
(MediumꢀBiasꢀMode)
> 7 dBm
< +17 dBm
+1.8 V +1.8 V
0 V
Highꢀpower
(HighꢀBiasꢀMode)
> +17 dBm
-
High
+1.8 V
0 V
0 V
0 V
0 V
0 V
3.2ꢀ-ꢀ4.2ꢀV
3.2ꢀ-ꢀ4.2ꢀV
>ꢀ3.2ꢀV
>ꢀ3.2ꢀV
Shutdown
Shutdown
VBATT
VCC
C3
33 pF
C2
0.1 µF
C1
0.1 µF
C4
C5
2.2 µF
GND at slug
2.2 µF ceramic
1
10
VBATT
VCC
2
3
4
5
9
8
7
6
RFIN
VMODE1
VMODE0
VEN
RFIN
RFOUT
RFOUT
C6
VMODE2
VMODE1
VEN
CPLIN
GND
CPLIN
33 pF
CPLOUT
CPLOUT
Figure 3: Evaluation Board Schematic
Data Sheet - Rev 2.4
6
01/2012
ANADIGICS [ ANADIGICS, INC ]
