SKY16602-632LF Datasheet, PDF (4/11 Pages) Skyworks Solutions Inc. – Low limiting threshold

DATA SHEET ● SKY16602-632LF: LOW-THRESHOLD PIN DIODE LIMITER
Theory of Operation
A limiter prevents overload by allowing RF signals that are
below a certain threshold to pass through, but larger signals
exceeding the threshold are increasingly attenuated. The
SKY16602-632LF has a lower threshold level over a traditional
self-bias limiter circuit with an inductor for a ground return. It
accomplishes this by adding a basic PIN limiter diode (Pin 1) in
parallel to a Schottky diode (Pin 2). The low turn on voltage of
the Schottky diode reduces the threshold level while the PIN
limiter diode protects the Schottky diode at higher power levels.
Therefore, for maximum RF power handling, the RF input signal
is required to be connected to Pin 1. The two internal DC
input/output capacitors provide DC blocking needed for most
applications.
Tuned Circuit
The module may be RF tuned for optional RF match and
insertion loss centered at a target frequency within its normal
band of operation. This is done with the use of external surface
mount components. The schematic diagram in Figure 3 shows
the SKY16602-632LF limiter with a shunt connected capacitor
and inductor tuned for 2.45 GHz. The bill of materials for the
2.45 GHz tuned circuit is shown in Table 4. Electrical
specifications for the 2.45 GHz tuned limiter module are
provided in Table 5.
RF_IN
RF_OUT
202945E-003
C1
L1
Figure 3. SKY16602-632LF Schematic
with External Tuning Networks Optimized for 2.45 GHz
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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April 11, 2016 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202945F