SKY65116 Datasheet, PDF (9/14 Pages) Skyworks Solutions Inc. – 390-500 MHz Linear Power Amplifier

Data Sheet • SKY65116
Theory of Operation
The SKY65116 is comprised of two amplifier stages, and is
internally matched for optimum linearity and efficiency. The
matching circuits for the input stage, inter-stage, and output stage
are contained within the device. An on-chip active bias circuit is
included within the device for both input and output stages pro-
viding for excellent gain tracking over temperature and voltage
variations. The module operates with all positive DC voltages
while maintaining high efficiency and good linearity. The nominal
operating voltage is 3.6 V for maximum power, but can be oper-
ated at slightly lower voltages for other mobile applications.
The input and output stages are independently supplied using the
V_CC1 and V_CC2 supply lines, pins 4 and 10, respectively. The bias
reference voltage is supplied using a common V_REF (pin 12) line.
The module includes a silicon CMOS controller circuit to
provide an amplifier On/Off operation. V_CNT (pin 11) is the PA on/
off control voltage to the CMOS controller for stages 1 and 2. 0 V
= Off, 3.6 V = On. Nominal “On” operating range is between 2.7
to 3.6 V_DC. V_CNT set to 0 V_DC will force the amplifier into
off mode, drawing only microamperes of current.
Application Circuit Notes
Center Ground. It is extremely important that the device paddle
be sufficiently grounded for both thermal and stability reasons.
Multiple small vias are acceptable and will work well under the
device if solder migration is an issue.
Ground (Pins 1, 3, 5, 6, 7, 9). Attach all ground pins to the RF
ground plane with the largest diameter and lowest inductance
via that the layout will allow. Multiple small vias are also
acceptable and will work well under the device if solder
migration is an issue.
RF_IN (Pin 2). Amplifier RF Input Pin. Z_O = 50 W. The module
includes an onboard internal DC blocking capacitor. All imped-
ance matching is provided internal to the module.
V_CC1 (Pin 4). Supply voltage for the first stage collector bias
(typically 3.6 V). Bypassing of V_CC1 is accomplished with C7 and
C8 and should be placed in the approximate location shown on
the evaluation board, but placement is not critical.
RF_OUT (Pin 8). Amplifier RF Output Pin. Z_O = 50 W. The
module includes an onboard internal DC blocking capacitor.
All impedance matching is provided internal to the module.
V_CC2 (Pin 10). Supply voltage for the output (final) stage collector
bias (typically 3.6 V). Bypassing of V_CC2 is accomplished with C1
and C4 and should be placed in the approximate location shown
on the evaluation board, but placement is not critical.
V_CNT (Pin 11). V_CNT is the PA on/off control voltage to the silicon
CMOS controller for stages 1 and 2. 0 V = Off, 3.6 V = On.
Nominal “On” operating range is between 2.7 to 3.6 V_DC. V_CNT
set to 0 V_DC will force the amplifier into standby mode.
V_REF (Pin 12). Bias reference voltage for amplifier stages 1 and
2. V_REF should be operated over the same voltage range as V_CC,
with a nominal voltage of 3.6 V.
Package and Handling Information
Since the device package is sensitive to moisture absorption, it
is baked and vacuum packed before shipping. Instructions on the
shipping container label regarding exposure to moisture after the
container seal is broken must be followed. Otherwise, problems
related to moisture absorption may occur when the part is sub-
jected to high temperature during solder assembly.
Please refer to Skyworks solder reflow application note, avail-
able at www.skyworksinc.com, for instructions on mounting the
SKY65116 to a printed circuit board.
Production quantities of this product are shipped in a stan-
dard tape and reel format. For packaging details, refer to the
Skyworks Application Note, Tape and Reel, document number
101568.
Electrostatic Discharge (ESD) Sensitivity
The SKY65116 is a static-sensitive electronic device. Do not
operate or store near strong electrostatic fields. Take proper
ESD precautions.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
200510 Rev. H • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 18, 2009
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