ALT6708
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 the V
EN
, V
MODE1
and V
MODE2
voltages.
Bias Modes
The power amplifier may be placed in either Low,
Medium or High Bias modes by applying the
appropriate logic level (see Operating Ranges table)
to the V
MODE
voltages. The Bias Control table below
lists the recommended modes of operation for various
applications.
Three operating modes are recommended to optimize
current consumption. High Bias/High Power operating
mode is for P
OUT
levels > 16 dBm. At ~17dBm - 6.5
dBm, the PA should be “Mode Switched” to Medium
Power Mode. For P
OUT
levels < ~7.5 dBm, the PA
can be switched to Low Power Mode for even lower
quiescent current consumption.
Table 6: Bias Control
APPLICATION
Low power
(Low Bias Mode)
Med power
(Medium Bias Mode)
High power
(High Bias Mode)
Shutdown
P
OUT
LEVELS
+7.5 dBm
> +6.5 dBm
+17
dBm
> +16 dBm
-
BIAS
MODE
Low
Low
High
Shutdown
V
EN
+1.8 V
+1.8 V
+1.8 V
0V
V
MODE1
+1.8 V
+1.8 V
0V
0V
V
MODE2
+1.8 V
0V
0V
0V
v
cc
3.1 - 4.35 V
3.1 - 4.35 V
3.1 - 4.35 V
3.1 - 4.35 V
V
BATT
> 3.1 V
> 3.1 V
> 3.1 V
> 3.1 V
V
BATT
V
CC
C5
2.2 µF
RF
IN
V
MODE2
V
MODE1
V
EN
C1
C9
0.01 µF 100 pF
GND at slug
1
2
3
4
5
V
BATT
RF
IN
V
MODE2
V
MODE1
V
EN
V
CC
RF
OUT
CPL
IN
GND
10
9
8
7
C3
330 pF
C2
C4
0.01 µF 2.2 µF ceramic
RF
OUT
CPL
IN
CPL
OUT
CPL
OUT
6
Figure 10: Evaluation Board Schematic
7
Data Sheet - Rev 2.3
03/2012
ANADIGICS [ ANADIGICS, INC ]
