ALT6720 Datasheet, PDF (5/9 Pages) ANADIGICS, Inc – HELP4 E800 (Band 20) LTE Linear PAM

ALT6720
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 ~16 dBm - 7 dBm,
the PA could be switched to Medium Power Mode. For
POUT levels < ~7 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 5: Bias Control
POUT
LEVELS
BIAS
MODE
VEN
VMODE1
VMODE2
VCC
≤ +7 dBm
Low +1.8 V +1.8 V +1.8 V 3.2 - 4.35 V
≥ +7 dBm
≤ +16 dBm
Low
+1.8 V +1.8 V
0V
3.2 - 4.35 V
≥ +16 dBm High +1.8 V 0 V
0 V 3.2 - 4.35 V
-
Shutdown 0 V
0V
0 V 3.2 - 4.35 V
VBATT
> 3.2 V
> 3.2 V
> 3.2 V
> 3.2 V
VBATT
C6
2.2 µF
C1
C5
0.01µF _{100 pF}
RFIN
VMODE2
VMODE1
(1)
VEN
GND at slug
1 _VBATT
2 _RFIN
3 _VMODE2
4 _VMODE1
5 _VEN
VCC ¹⁰
RFOUT ⁹
CPLIN ⁸
GND ⁷
CPLOUT ⁶
C3
330 pF
C2
0.01 µF
VCC
C4
2.2 µF ceramic
CPLIN
RFOUT
CPLOUT
Notes:
(1) Rise and Fall time on VEN Control Signal must be ≤ 1.0 µS.
Figure 3: Evaluation Board Schematic
5
Data Sheet - Rev 2.3
03/2012