TUNING VARACTOR
Plastic package Surface Mount Silicon abrupt tuning varactor
S OT2 3 S URFACE MOUNT S ILICON ABRUP T
TUNING VARACTOR
Description
This series of silicon tuning varactors have an epitaxial m esa design with a high tem perature
passivation. This technology is used to produce abrupt tuning varactor in SOT23 package. This fam ily
is designed for a low cost m edium to high volum e m arket that m ay be supplied in tape and reel
for autom ated pick and place assem bly on surface m ount circuit boards.
Applications
The DH71000 series abrupt tuning varactor are offered in a large selection of capacitance range.
They provide the highest Q factor (low reverse series resistance) available for a 30 volts silicon device.
Typical applications include low noise narrow and m oderate frequency bandwidth applications
(VCO m ainly) from HF to Microwave frequencies (up to 3 GHz). Other applications are voltage tuned
filters, phase shifters, delay line, etc.
NOTE: Variation of the junction capacitance versus reverse voltage follows this equation:
C (0 V)
j
C (V )
j
r
=
γ
1 + V
r
[
]
φ
V
:
:
:
Reverse voltage
r
φ
Built-in potential .7V for Si
.5 for abrupt tuning varactor
γ
12-32
Vol. 1
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TEMEX [ TEMEX ]
