AWT6221R Datasheet, PDF (6/8 Pages) ANADIGICS, Inc – HELP3TM Dual-band Cellular/PCS UMTS 3.4 V HSPA Linear Power Amplifier Module

AWT6221R
APPLICATION INFORMATION
To ensure proper performance, refer to all related
Application Notes on the ANADIGICS web site:
http://www.anadigics.com
The Bias Control table lists the recommended modes
of operation for various applications. VMODE2 is not
necessary for this PA.
Shutdown Mode
The power amplifier may be placed in a shutdown
mode by applying logic low levels (see Operating
Ranges table) to the VENABLE and VMODE1 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 VMODE1.
Two operating modes are available to optimize
current consumption. High Bias/High Power operating
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.
APPLICATION
UMTS - low power
UMTS - high power
Optional lower VCC in
low power mode
Shutdown
Table 6: Bias Control
POUT
LEVELS
BIAS
MODE
VENABLE
< +16 dBm Low +2.4 V
> +16 dBm High +2.4 V
VMODE1
+2.4 V
0V
VCC
3.2 - 4.2 V
3.2 - 4.2 V
< +7 dBm
Low +2.4 V +2.4 V
1.5 V
-
Shutdown 0 V
0 V 3.2 - 4.2 V
VBATT
> 3.2 V
> 3.2 V
> 3.2 V
> 3.2 V
Figure 3: Application Circuit
6
Data Sheet - Rev 2.3
11/2008