TOC
Tuning Varactors
FREQUENCY LINEAR TUNING VARACTORS
DESCRIPTION
A Frequency Linear Tuning Varactor (FLTVAR)
TM
is a sili-
con epitaxial mesa device, designed to provide wide-
band Linear Tuning in VCO and filter applications.
These diodes feature thermal oxide passivation for high
reliability, low leakage current, and very low surface
noise. They offer Q values well above ion-implanted
hyperabrupt diodes.
The specifications below apply to chips, or to chips
mounted on carriers. Although these chips can be pro-
vided in any of our standard packages, this is not recom-
mended for the lower capacitance diodes, because the
parallel parasitic capacitance of the package degrades
linearity at high bias voltages.
suitable circuits, with no need for external linearization.
The combination of high Q and low surface noise results
in low FM noise in VCO applications. They are particu-
larly useful in modulated VCO鈥檚 because of their con-
stant sensitivity, and high modulation rate capability.
ELECTRICAL SPECIFICATIONS: T
A
=25擄C
APPLICATIONS
The GC15000 series of frequency-linear tuning varactors
are used in VCO鈥檚, filters, amplifiers and modulators for
wide band tuning through Ku band. The frequency linear
characteristics allow over one octave linear tuning in
JUNCTIO
N
1
CAPACIT
ANCE
C
J-4
(pF)
SENSITIV
ITY
2
TYP
0.7
1.0
2.0
5.0
10.0
22.0
33.0
48.0
0.7
1.0
2.0
5.0
10.0
22.0
33.0
48.0
QUALITY
FACTOR
3
TYP
TUNING
RATION
4
C
J
0 / C
J
V
TYP
.08
.08
.08
.08
.08
.08
.08
.08
.11
.11
.11
.11
.11
.11
.11
.11
Typical Performance
MODEL
NUMBER
GC15001
GC15002
GC15003
GC15004
GC15005
GC15014
GC15015
GC15016
GC15006
GC15007
GC15008
GC15009
GC15010
GC15011
GC15012
GC15013
NOTES:
1.
2.
3.
4.
1500
1450
1400
1300
900
600
475
400
900
875
850
825
800
600
475
400
6:1
6:1
6:1
6:1
6:1
6:1
6:1
6:1
11:1
11:1
11:1
11:1
11:1
11:1
11:1
11:1
Other capacitance values are available; consult factory.
Other S values and tuning ranges can be developed.
V=4 V 50 MHz
,
Sensitivity series, S = .08; V = 15 volts.
Sensitivity series, S = . 11; V = 20 volts.
RATINGS
Minimum Voltage Breakdown:
Maximum Leakage Current:
Capacitance Tolerance:
Operating Temperature:
Storage Temperature:
22 volts at 10碌A max
50 nA at 20 volts, 25擄C
鹵10% at -4 volts
1
-55潞C to +150潞C
-65潞C to +200潞C
SEMICONDUCTOR OPERATION
75 T
echnology Drive 聲 Lowell, MA 01851 聲 T
el: 978-442-5600 聲 Fax: 978-937-3748
35
1
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