AWT6388 Datasheet, PDF (5/8 Pages) ANADIGICS, Inc – 450 MHz CDMA 3.4V/29.5dBm Linear Power Amplifier Module

APPLICATION INFORMATION
AWT6388
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 VREF and VMODE voltages.
voltage. The Bias Control table lists the recommended
modes of operation for various applications.
High Bias Mode is recommended for POUT levels >
16 dBm. At POUT <16dBm. The PA should be “Mode
Switched” to Low Bias Mode to improve efficiency and
reduce current consumption at power output levels
below 16 dBm.
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 VMODE
APPLICATION
CDMA - low power
CDMA - high power
Shutdown
Table 5: Bias Control
POUT
LEVELS
BIAS
MODE
VREF
VMODE
VCC
< +16 dBm
Low +2.85 V +2.85 V +3.2 - 4.2 V
>+16 dBm
High +2.85 V 0 V +3.2 - 4.2 V
-
Shutdown 0 V
0 V +3.2 - 4.2 V
Figure 3: Application Circuit
Data Sheet - Rev 2.1
5
09/2008