ALT6704 Datasheet, PDF (8/12 Pages) ANADIGICS, Inc – HELP4 UMTS1700 (Band 3,4,9,10) WCDMA/LTE/CDMA Mixed Mode PAM

ALT6704
APPLICATION INFORMATION
To ensure proper performance, refer to all related
Application Notes on the ANADIGICS web site:
http://www.anadigics.com
to the VMODE pins. The Bias Control table below lists
the recommended modes of operation for various
applications.
Shutdown Mode
The power amplifier may be placed in a shutdown mode
by applying logic low levels (see Operating Ranges
table) to the VEN, VMODE1 and VMODE2 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)
Three operating modes are recommended to optimize
current consumption. High Bias/High Power operating
mode is for POUT levels > 16 dBm. At ~17dBm - 6 dBm,
the PA could be switched to Medium Power Mode. For
POUT levels < ~8 dBm, the PA could be switched to Low
Power Mode for extremely low current consumption.
APPLICATION
Low power
(Low Bias Mode)
Med power
(Medium Bias Mode)
High power
(High Bias Mode)
Shutdown
Table 7: Bias Control
POUT
LEVELS
BIAS
MODE
VEN
VMODE1
VMODE2
VCC
< +8 dBm
Low +1.8 V +1.8 V +1.8 V 3.1 - 4.35 V
> 6 dBm
< +17 dBm
Low
+1.8 V +1.8 V
0V
3.1 - 4.35 V
> +16 dBm High +1.8 V 0 V
0 V 3.1 - 4.35 V
-
Shutdown 0 V
0V
0 V 3.1 - 4.35 V
VBATT
> 3.1 V
> 3.1 V
> 3.1 V
> 3.1 V
VBATT
C5
2.2 µF
RFIN
VMODE2
VMODE1
VEN
8
C1
33pF
GND at slug
1 _VBATT
2 _RFIN
3 _VMODE2
4 _VMODE1
5 _VEN
VCC ¹⁰
RFOUT ⁹
CPLIN ⁸
GND ⁷
CPLOUT ⁶
C2
0.1µF
VCC
C3
2.2µF ceramic
CPLIN
RFOUT
CPLOUT
Figure 9: Evaluation Board Schematic
Data Sheet - Rev 2.5
03/2012