AWT6638
The AWT6638 power amplifier module is based on
ANADIGICS proprietary HELP3DC™ technology.
The PA is designed to operate up to 17 dBm in the low
power mode, thus eliminating the need for three gain
state, while still maintaining low quiescent current
and high efficiency in low and medium power levels.
Average weighted efficiency can be increased by
using an external switch mode power supply (SMPS)
or DC/DC converter to reduce V
CC
.
HELP3DC
TM
which eliminates the need for an external constant
voltage source. The PA is turn on/off is controlled
by V
EN
pin. A single V
MODE
control logic (V
MODE1
) is
needed to operate this device. AWT6638 requires
only two calibration sweeps for system calibration,
thus saving calibration time.
Figure 11 shows one application example on mobile
board. C1 and C2 are RF bypass caps and should
be placed nearby pin 1 and pin 10. Bypass caps
The directional “daisy chainable” coupler is integrated C4 and C5 may not be needed. Also a “T” matching
within the PA module, therefore there is no need for topology is recommended at PA RF
IN
and RF
OUT
external couplers.
ports to provide matching between input TX Filter and
Duplexer / Isolator.
The AWT6638 has an integrated voltage regulator,
V
BATT
SMPS
C6
GND
RF
IN
TX filter
C1
GND
V
BATT
RF
IN
V
MODE2
V
MODE1
C5
V
EN
GND
at slug
V
CC
RF
OUT
CPL
IN
GND
CPL
OUT
GND
50Ω
C2
GND
GND
C3
RF
OUT
Duplexer
Input
Matching
Output
Matching
BB
PA_R0
PA_0N
GND
To
Detector
C4
GND
Figure 12: Typical Application Circuit
9
PRELIMINARY DATA SHEET - Rev 1.3
02/2012
ANADIGICS [ ANADIGICS, INC ]
