SKY65016-70LF Datasheet, PDF (4/5 Pages) Skyworks Solutions Inc. – InGaP Cascadable Amplifier LF-3 GHz

DATA SHEET • SKY65016-70LF
Evaluation Board
IS
VS
C4
L2
L3
R₁
L1
VD
Input
Output
C1
C2
Evaluation Board Parts List
Component
C₁, C₂, C₄
L₁
L₂
R₁
Description
Capacitor
Inductor
Ferrite bead
Resistor
U₁
Amplifier
Value
47 nF
33 nH
See Current Limiting
Resistor Values Table
Current Limiting Resistor Values
V_S, V
R₁
Resistance, Ω
4
13
4.6
28
5
38
6
63
8
113
9
138
10
163
12
213
Minimum Power
Dissipation rating, mW
125
125
125
125
250
500
500
500
The SKY65016 evaluation board comprises the SKY65016
amplifier, the input and output of which are connected via 50 Ω
microstrip transmission lines with DC blocking capacitors, C₁ and
C₂, to the input and output SMA connectors, respectively.
The positive supply voltage, V_S, is connected to pin 3, RF Output
of the amplifier via the decoupling network which consists of C₄,
L₁, L₂ and R₁. The power supply current, I_S, must be limited,
either via the current limit function of an external bench power
supply, or by replacing L₃ with resistor R₁, the value of which is
given in the Current Limiting Resistor Values table. The evaluation
board is shipped with L₃ in place, which shifts an in-band series
resonance of the supply decoupling network out of band. For low
frequency applications, R₁ may be used to conveniently limit
supply current on the evaluation board.
The evaluation board also contains a probe fixture which
facilitates the direct measurement of the s parameters of the
SKY65016. The probe fixture comprises a very short coplanar
waveguide (CPW) transmission line to pin 1 and an identical line
to pin 3. All other pins of the amplifier are grounded. The CPW
transmission lines are compatible with ground-signal-ground
wafer probe tips, which can be connected to the RF ports of a
vector network analyzer (VNA) via coaxial cables. The very small
electrical length of these CPW transmission lines obviates the
need to de-embed their effects from the s parameters that are
measured. The supply constant current must be applied via the
bias tee, which is typically integrated into the VNA, which is cas-
cade with the output pin of the amplifier.
Size
Suggested Part Number
Comments
0603
0603
FBMH4525HM162N-T
0603
SKY65016
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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September 25, 2006 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200357 Rev. C