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EK42821-02

P1-P3P4-P6P7-P9P10-P12
Product Specification
PE42821
Page 7 of 12
Document No. DOC-13714-4 │ www.psemi.com ©2012-2015 Peregrine Semiconductor Corp. All rights reserved.
Typical Performance Data @ +25 °C, V
DD
= 3.3V, V
SS_EXT
= 0V, unless otherwise noted
Figure 12. Isolation vs. Temp
(RFX–RFX, RFX Active)
Figure 13. Isolation vs. V
DD
(RFX–RFX, RFX Active)
Product Specification
PE42821
Page 8 of 12
©2012-2015 Peregrine Semiconductor Corp. All rights reserved. Document No. DOC-13714-4 │ UltraCMOS
®
RFIC Solutions
Thermal Data
Though the insertion loss for this part is very low,
when handling high power RF signals, the junction
temperature rises significantly.
VSWR conditions that present short circuit loads to
the part can cause significantly more power
dissipation than with proper matching.
Special consideration needs to be made in the
design of the PCB to properly dissipate the heat
away from the part and maintain the 85°C maximum
case temperature. It is recommended to use best
design practices for high power QFN packages:
multi-layer PCBs with thermal vias in a thermal pad
soldered to the slug of the package. Special care
also needs to be made to alleviate solder voiding
under the part.
Table 6. Theta JC
Parameter Min Typ Max Unit
Theta JC (+85 °C) 20
C/W
Product Specification
PE42821
Page 9 of 12
Document No. DOC-13714-4 │ www.psemi.com ©2012-2015 Peregrine Semiconductor Corp. All rights reserved.
Figure 14. Evaluation Board Layout
Evaluation Kit
The PE42821 Evaluation Kit board was designed
to ease customer evaluation of the PE42821 RF
switch.
The evaluation board in Figure 14 was designed
to test the part. DC power is supplied through J10,
with VDD on pin 9, and GND on the entire lower
row of even numbered pins. To evaluate a switch
path, add or remove jumpers on V1 (pin 3) using
Table 5.
The ANT port is connected through a 50Ω
transmission line via the top SMA connector, J1.
RF1 and RF2 paths are also connected through
50Ω transmission lines via SMA connectors as J2
and J3. A 50Ω through transmission line is
available via SMA connectors J5 and J6. This
transmission line can be used to estimate the loss
of the PCB over the environmental conditions
being evaluated. An open-ended 50Ω
transmission line is also provided at J4 for
calibration if needed.
Narrow trace widths are used near each part to
improve impedance matching. The shunt C1 on
RFC port is to provide for high frequency
impedance matching.
PRT-10605
P1-P3P4-P6P7-P9P10-P12

EK42821-02

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Description:
EVAL BOARD RF SWITCH SPDT
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New from this manufacturer.
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