AWT6276R
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 operating
mode is for P
OUT
levels > 16 dBm. At P
OUT
<16dBm,
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
< +16 dBm
>+16 dBm
-
BIAS
MODE
Low
Low
High
Shutdown
V
R EF
V
MODE
V
CC
> +1.5 V
+2.85 V +2.85 V
+2.85 V +2.85 V +3.2 - 4.2 V
+2.85 V
0V
0V
0V
+3.2 - 4.2 V
+3.2 - 4.2 V
VCC1
VCC2
C1
0.01µF
RF IN
1
2
3
V
CC
RF
IN
GND
V
MODE
V
REF
V
CC
GND
RF
OUT
GND
GND
GND
at slug
10
9
8
7
6
C3
0.01µF
C4
2.2µF ceramic
RF OUT
VMODE
VREF
4
5
C2
0.01µF
Figure 3: Application Circuit Schematic
PRELIMINARY DATA SHEET - Rev 1.4
12/2005
5
ANADIGICS [ ANADIGICS, INC ]
