ALT5020 Datasheet, PDF (5/10 Pages) ANADIGICS, Inc – High Efficiency UMTS E800 (Band 20) LTE Linear PAM

ALT5020
APPLICATION INFORMATION
To ensure proper performance, refer to all related
Application Notes on the ANADIGICS web site:
http://www.anadigics.com
logic level (see Operating Ranges table) to VMODE1,2.
The Bias Control table 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 VENABLE and VMODE voltages.
Bias Modes
The power amplifier may be placed in either a Low,
Medium or High Bias mode by applying the appropriate
Three operating modes are available to optimize
current consumption. High Bias/High Power operating
mode is for POUT levels > 15 dBm. At around 16 dBm
output power, the PA should be “Mode Switched” to
Medium power mode for lowest quiescent current
consumption. The PA should be switched to Low Bias/
Low Power mode at ~<7 dbm.
Vcontrols
Venable/Vmode(s)
On Sequence Start
T_0 N =0 µ
ON Sequence
Rise/Fall Max 1µS
Defined at 10% to 90%
of Min/Max Voltage
Off Sequence Start
T_0FF= 0µ
OFF Sequence
RFIN
notes 1,2
VEN
VCC
note 1
T_0N+1µS
T_0N+3 µS
T_0FF+2µS T_0FF+3µS
Referenced After 90% of Rise
Time
Referenced Before10% of Fall
Time
Figure 3: Recommended ON/OFF Timing Sequence
Notes:
(1) Level might be changed after RF is ON.
(2) RF OFF defined as PIN ≤ -30 dBm.
(3) Switching simultaneously between VMODE and VEN is not recommended.
5
advanced product information - Rev 0.0
09/2013