SKY65364-21 Datasheet, PDF (3/14 Pages) Skyworks Solutions Inc. – High-efficiency PA

DATA SHEET • SKY65364-21: T/R FRONT-END MODULE
Technical Description
The SKY65364-21 consists of a complete T/R chain with T/R
switches contained in the module. A single-pole, triple-throw
(SP3T) switch selects between the receive, transmit, and transmit
bypass paths. The module has a shut-down mode to minimize
power consumption.
Three digital input pins (EN, TR, and BYP) are used to select
between transmit, transmit bypass, receive, receive bypass, or
shutdown mode.
Transmit Path
The transmit path contains a Power Amplifier (PA) optimized for
saturated performance. The PA output is internally matched for
optimum output power and efficiency into a 50 Ω load
impedance. The PA output is passed through an harmonic filter
before being fed through the SP3T switch. The PA input provides
a good return loss into a 50 Ω source impedance.
Transmit output power is controlled by the VPC pin, which is
normally set to 2.25 V DC voltage. The nominal DC input
impedance into the VPC pin is 50 kΩ.
Receive Path
The receive path contains an LNA with bypass switch. The LNA
impedance matching networks are internal to the module and
have been optimized for a low NF while maintaining good return
losses into a 50 Ω source and load impedance. The receive arm
of the SP3T switch and the LNA input are connected to module
pins to allow an external filter to be inserted into the receive path.
Operation Mode Control
The five SKY65364-21 operating modes are controlled by the
three digital pins TR, EN, and BYP (pins 2, 3, and 4, respectively).
The control logic truth is provided in Table 2.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY65364-21 are provided
in Table 3. Recommended operating conditions are specified in
Table 4. Electrical specifications are provided in Tables 5, 6,
and 7.
Table 2. SKY65364-21 Operating Modes Truth Table¹
Control Voltage
Internal States
TR
EN
BYP
Operating Mode
(Pin 2)
(Pin 3)
(Pin 4)
PA
LNA Bypass
PA Bypass
LNA
Switch
T/R Switch
Switch
Transmit
1
1
0
On
Off
Open
PA
PA
Transmit bypass
1
1
1
Off
Off
Open
PA bypass
PA bypass
Receive
0
1
0
Off
On
Open
RX1
Open
Receive Bypass
0
1
1
Off
Off
Through
RX1
Open
Shutdown²
X
0
X
Off
Off
Open
Open
Open
1 _{See Table 4 for logic 0 and 1 characteristics. “X” = don’t care state, defined as a valid state of logic 1 or 0.}
2 _{In the high state, EN, TR, and BYP have an input current of 33 μA due to an internal 100 kΩ pulldown resistance. For the lowest leakage current, the high state is not recommended for TR}
and BYP when the device is in shutdown mode (EN = 0).
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
203189F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 24, 2016
3