AWT6244
APPLICATION INFORMATION
To ensure proper performance, refer to all related logic level (see Operating Ranges table) to VMODE1
.
Application Notes on the ANADIGICS web site: The Bias Control table lists the recommended modes
http://www.anadigics.com
of operation for various applications. VMODE2 is not
necessary for this PA.
Shutdown Mode
The power amplifier may be placed in a shutdown Two operating modes are available to optimize
mode by applying logic low levels (see Operating current consumption. High Bias/High Power operating
Ranges table) to the VENABLE and VMODE1 voltages.
mode is for POUT levels > 16 dBm. At around 16 dBm
output power, the PA should be “Mode Switched” to
Medium/Low power mode for lowest quiescent current
consumption.
Bias Modes
The power amplifier may be placed in either a Low Bias
mode or a High Bias mode by applying the appropriate
Table 6: Bias Control (TD-SCDMA)
P
OUT
APPLICATION
BIAS MODE
Low
V
ENABLE
V
MODE1
V
CC
V
BATT
Levels
TD-SCDMA-med/low
power (Low Bias Mode)
+ 16 dBM
> +15 dBm
-
3.2 V
3.2 V
3.2 V
+2.4 V
+2.4 V
0 V
+2.4 V
0 V
3.2- 4.2 V
3.2- 4.2 V
3.2 - 4.2 V
TD-SCDMA-high power
(High Bias Mode)
High
Shutdown
Shutdown
0 V
V
BATT
VCC
C1
0.01µF
C3
0.01µF
C4
2.2µF ceramic
C5
2.2 µF
1
10
9
V
BATT
V
CC
2
RFOUT
RF OUT
RF IN
RFIN
C6
68pF
8
3
GND
GND
V
V
V
MODE2 (N/C)
4
7
V
MODE1
MODE1
5
6
V
ENABLE
ENABLE
GND
GND
at slug
C2
0.01µF
Figure 7: Application Circuit Schematic
Data Sheet - Rev 2.0
8
05/2010
ANADIGICS [ ANADIGICS, INC ]
