AWT6271
APPLICATION INFORMATION
To ensure proper performance, refer to all related
Application Notes on the ANADIGICS web site:
http://www.anadigics.com
Shutdown Mode
The power amplifier may be placed in a shutdown
mode by applying logic low levels (see Operating
Ranges table) to both the V
REF
and V
MODE
voltages.
Bias Modes
The power amplifier may be placed in either a Low
Bias mode or a High Bias mode by applying the
appropriate logic level (see Operating Ranges table)
to the V
MODE
voltage. The Bias Control table lists the
recommended modes of operation for various
applications.
Three operating modes are recommended to
optimize current consumption. High Bias/High V
CC
operating mode is for P
OUT
levels > 16 dBm. At
~16dBm - 7 dBm, the PA should be “Mode Switched”
to Low Bias Mode. For P
OUT
levels < ~7 dBm, the V
CC
can be switched to 1.5 V (Low Bias Mode is also
used for this P
OUT
range).
Table 5: Bias Control
APPLICATION
CDMA - low power
CDMA - med power
CDMA - high power
Shutdown
P
OUT
LE V E LS
<+7 dBm
7 < P
OUT
< +16 dBm
>+16 dBm
-
BIAS
MODE
Low
Low
High
Shutdown
V
R EF
V
MODE
V
CC
> +1.5
+3.4
+3.4
-
+2.85 V +2.85 V
+2.85 V +2.85 V
+2.85 V
0V
0V
0V
V
REF
C2
0.01
µF
V
REF
V
MODE
V
MODE
GND
RF
IN
V
CC1
RF
IN
V
CC1
GND
GND
RF
OUT
GND
V
CC2
C4
0.01
µF
GND
at Slug
C6
1
µF
C7
2.2
µF
V
CC2
GND
at Slug
RF
OUT
Figure 3: Application Schematic
PRELIMINARY DATA SHEET - Rev 1.8
03/2006
5
ANADIGICS [ ANADIGICS, INC ]
