sky74092-11 Skyworks Solutions, Inc., sky74092-11 Datasheet - Page 2

• Manufacturer Part Number: sky74092-11
• Description: Sky74092-11 Dual-band Lna For Cdma, Femtocell, And Pcs Mobile Handset Applications
• Manufacturer: Skyworks Solutions, Inc.

DATA SHEET • SKY74092-11 LNA
Technical Description
Bias Reference
LNA bias currents are derived from an on-chip bandgap voltage
reference. The voltage reference requires a 10 k external
resistor.
Cellular Band LNA
The cellular band LNA requires an off-chip matching network at
input and output terminals. The LNA is designed to provide a
low Noise Figure (NF) and high 3
(IIP3) to achieve the maximum dynamic range.
The cellular LNA has four gain steps to optimize gain, linearity,
and noise at various input signal levels: high gain, mid-gain,
bypass, and high attenuation.
PCS Band LNA
The PCS band LNA requires an off-chip matching network at
input and output terminals. The PCS LNA is designed to provide
a low NF and high IIP3 to achieve the maximum dynamic range.
The PCS LNA has four gain steps to optimize gain, linearity, and
noise at various input signal levels: high gain, mid-gain, bypass,
and high attenuation.
Serial Interface
A three-wire serial bus is used to control the operation mode,
gain, and current of the LNAs. The CLK, DATA, and LE signals
2
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
July 23, 2010 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 103205E
CELL_LNA_IN
PCS_LNA_IN
rd
order Input Intercept Point
+
+
Figure 2. SKY74092-11 LNA Block Diagram
PCS LNA
Cell LNA
4-Step
4-Step
Bias Resistor
LE
(pins 3, 4, and 5, respectively) provide the control inputs. The
SKY74092-11 provides the following control and test registers:
 Mode Selection
 Gain Control
 Current Selection
The SKY74092-11 supports two types of fixed-length data
transfers: 9-bit and 27-bit. Data is latched starting from the
second high-to-low transition on the CLK signal after LE goes
low. The first high-to-low transition of the CLK signal is ignored.
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 subjected to high temperature during solder assembly.
The SKY74100 is rated to Moisture Sensitivity Level 3 (MSL3) at
260 C. It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
PCB Design & SMT Assembly/Rework Guidelines for RFLGA
Packages, document number 103147.
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
tape and reel format.
Bias Reference
Serial Bus
3-Wire
DATA
VCC
CLK
VCC
VCC
+
+
PCS_LNA_OUT
CELL_LNA_OUT
S323