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DATA SHEET
SMV123x Series: Hyperabrupt Junction Tuning Varactors
Applications
• Low tuning voltage VCOs
• High-Q resonators in wireless system VCOs
• High-volume commercial systems
Features
• High capacitance ratio
• Low series resistance for low phase noise
• Packages rated MSL1, 260 °C per JEDEC J-STD-020
Description
The SMV123x series of silicon hyperabrupt junction varactor
diodes are designed for use in Voltage Controlled Oscillators
(VCOs) with a low tuning voltage operation. The low resistance of
these varactors makes them appropriate for high-Q resonators in
wireless system VCOs to frequencies over 10 GHz. This family of
varactors is characterized for capacitance and resistance over
temperature.
Table 1 describes the various packages and markings of the
SMV123x varactors.
DATA SHEET • SMV123x VARACTORS
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Table 1. Packaging and Marking
Single Single Single Common Cathode Common Anode Common Cathode Single
SC-79
Green™
SOD-323
Green™
SOT-23 SOT-23 SC-70 SC-70 SOD-882
Green™
SMV1231-074
Marking: JA3
SMV1231-079LF
Marking: Cathode
SMV1231-011LF
Marking: KA
SMV1231-074LF
Green™
Marking: KA3
SMV1231-040LF
Marking: A
SMV1232-074
Marking: CC3
SMV1232-079LF
Marking: Cathode
SMV1232-011LF
Marking: HC
SMV1232-074LF
Green™
Marking: HC3
SMV1232-040LF
Marking: Y
SMV1233-001
Marking: VP1
SMV1233-004
Marking: VP3
SMV1233-074
Marking: VP3
SMV1233-079LF
Marking: Cathode
♦SMV1233-011LF
Marking: DP
SMV1233-001LF
Green™
Marking: DP1
SMV1233-004LF
Green™
Marking: DP3
SMV1233-074LF
Green™
Marking: DP3
SMV1233-040LF
Marking: B
SMV1234-001
Marking: VQ1
SMV1234-004
Marking: VQ3
SMV1234-073
Marking: VQ9
SMV1234-079LF
Marking: Cathode
♦SMV1234-011LF
Marking: DQ
SMV1234-001LF
Green™
Marking: DQ1
SMV1234-004LF
Green™
Marking: DQ3
SMV1234-073LF
Green™
Marking: DQ9
SMV1234-040LF
Marking: G
SMV1235-001
Marking: VR1
SMV1235-004
Marking: VR3
SMV1235-074
Marking: VR3
SMV1235-079LF
Marking: Cathode
SMV1235-011LF
Marking: DR
SMV1235-001LF
Green™
Marking: DR1
SMV1235-004LF
Green™
Marking: DR3
SMV1235-074LF
Green™
Marking: DR3
SMV1235-040LF
Marking: M
SMV1236-001
Marking: AQ1
SMV1236-004
Marking: AQ3
SMV1236-074
Marking: AQ3
♦SMV1236-079LF
Marking: Cathode
SMV1236-011LF
Marking: EQ
SMV1236-001LF
Green™
Marking: EQ1
SMV1236-004LF
Green™
Marking: EQ3
SMV1236-074LF
Green™
Marking: EQ3
SMV1236-040LF
Marking: R
SMV1237-001
Marking: VT1
SMV1237-001LF
Green™
Marking: DT1
LS = 0.7 nH LS = 1.5 nH LS = 1.5 nH LS = 1.5 nH LS = 1.4 nH LS = 1.4 nH LS = 0.45 nH
The Pb-free symbol or “LF” in the part number denotes a lead-free, RoHS-compliant package unless otherwise noted as Green™. Tin/lead (Sn/Pb) packaging is not recommended
for new designs.
Innovation to Go™
Select Linear Products (indicated by ♦) now available for purchase online.
DATA SHEET • SMV123x VARACTORS
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Electrical and Mechanical Specifications
The absolute maximum ratings of the SMV123x varactors are
provided in Table 2. Electrical specifications are provided in
Table 3. Typical capacitance values are listed in Table 4. Typical
performance characteristics of the SMV123x varactors are
illustrated in Figures 1 through 4.
The SPICE model for the SMV123x varactors is shown in Figure 5
and the associated model parameters are provided in Table 5.
Package dimensions are shown in Figures 6 to 14 (even
numbers), and tape and reel dimensions are provided in Figures 7
to 15 (odd numbers).
Package and Handling Information
Instructions on the shipping container label regarding exposure to
moisture after the container seal is broken must be followed.
Otherwise, problems related to moisture absorption may occur
when the part is subjected to high temperature during solder
assembly.
The SMV123x series of varactors are rated to Moisture Sensitivity
Level 1 (MSL1) at 260 °C. They can be used for lead or lead-free
soldering. For additional information, refer to the Skyworks
Application Note, Solder Reflow Information, document number
200164.
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
tape and reel format.
Table 2. SMV123x Absolute Maximum Ratings
Parameter Symbol Minimum Maximum Units
Reverse voltage VR 15 V
Forward current IF 20 mA
Power dissipation PDIS 250 mW
Operating temperature TOP –55 +125 °C
Storage temperature TSTG –55 +150 °C
Note: Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other
parameters set at or below their nominal value. Exceeding any of the limits listed here may result in permanent damage to the device.
CAUTION: Although this device is designed to be as robust as possible, Electrostatic Discharge (ESD) can damage this device. This device
must be protected at all times from ESD. Static charges may easily produce potentials of several kilovolts on the human body
or equipment, which can discharge without detection. Industry-standard ESD precautions should be used at all times. The
SMV123x varactors are Class 1B Human Body Model (HBM) ESD devices.
DATA SHEET • SMV123x VARACTORS
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Table 3. SMV123x Electrical Specifications (Note 1)
(TOP = 25 °C, Unless Otherwise Noted)
Part
Number
CT @ 1 V
(pF)
CT @ 3 V
(pF)
CT @ 6 V
(pF)
CT @ 1 V
CT @ 3 V
(Ratio)
CT @ 1 V
CT @ 6 V
(Ratio)
RS @ 3 V,
500 MHz
(Ω)
Min. Max. Typ. Typ. Min. Max Min. Max. Typ.
SMV1231 1.43 1.72 0.97 0.61 1.5 1.8 2.5 2.8 2.90
SMV1232 2.34 2.86 1.50 0.94 1.5 1.9 2.6 3.3 1.50
SMV1233 3.00 3.60 1.80 1.10 1.5 1.9 2.6 3.3 1.20
SMV1234 5.85 7.15 3.60 2.00 1.6 2.0 2.8 3.4 0.80
SMV1235 10.35 12.65 6.40 3.60 1.6 2.0 2.9 3.4 0.60
SMV1236 15.50 18.50 9.20 5.30 1.6 2.0 3.0 3.5 0.50
SMV1237 45.00 54.00 26.90 14.40 1.6 2.0 3.0 3.5 0.40
Note 1: Performance is guaranteed only under the conditions listed in this Table.
Tested with -079 package.
Reverse voltage VR (IR = 10 μA) = 15 V minimum
Reverse current IR (VR = 12 V) = 20 nA maximum
Table 4. Capacitance vs Reverse Voltage
VR
(V)
CT (pF)
SMV1231 SMV1232 SMV1233 SMV1234 SMV1235 SMV1236 SMV1237
0 2.35 4.15 5.08 9.63 18.22 26.75 71.82
0.5 1.87 3.22 3.95 7.53 14.12 20.61 56.10
1.0 1.58 2.67 3.28 6.28 11.67 17.02 46.89
1.5 1.40 2.28 2.80 5.39 9.91 14.38 40.33
2.0 1.22 1.97 2.41 4.68 8.52 12.29 35.13
2.5 1.09 1.72 2.09 4.09 7.36 10.56 30.71
3.0 0.970 1.51 1.82 3.58 6.40 9.16 26.87
3.5 0.882 1.35 1.62 3.15 5.62 8.04 23.57
4.0 0.794 1.22 1.45 2.81 4.99 7.19 20.83
4.5 0.732 1.13 1.33 2.54 4.50 6.53 18.62
5.0 0.683 1.05 1.24 2.32 4.11 6.01 16.87
5.5 0.648 0.99 1.16 2.15 3.80 5.61 15.48
6.0 0.613 0.94 1.10 2.02 3.55 5.28 14.36
6.5 0.590 0.90 1.05 1.90 3.34 5.02 13.46
7.0 0.567 0.86 1.01 1.80 3.17 4.81 12.72
7.5 0.551 0.84 0.98 1.72 3.03 4.64 12.11
8.0 0.534 0.81 0.96 1.65 2.91 4.49 11.61
9.0 0.512 0.78 0.92 1.55 2.73 4.28 10.87
10.0 0.497 0.76 0.90 1.47 2.61 4.13 10.38
11.0 0.492 0.75 0.88 1.42 2.53 4.02 10.06
12.0 0.487 0.74 0.87 1.38 2.47 3.95 9.84
13.0 0.480 0.73 0.86 1.35 2.43 3.89 9.68
14.0 0.472 0.73 0.85 1.33 2.40 3.84 9.56
15.0 0.466 0.72 0.84 1.32 2.38 3.80 9.47
DATA SHEET • SMV123x VARACTORS
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Typical Performance Characteristics
Figure 1. Capacitance vs Reverse Voltage
Figure 3. Relative Capacitance Change vs Temperature
Figure 2. Series Resistance vs Reverse Voltage @ 500 MHz
Figure 4. Relative Series Resistance Change vs Temperature
@ 500 MHz
DATA SHEET • SMV123x VARACTORS
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Figure 5. SPICE Model
Table 5. SPICE Model Parameters
Part Number CJO
(pF)
VJ
(V)
M CP
(pF)
RS
(Ω)
SMV1231 1.88 10.13 4.999 0.44 2.50
SMV1232 3.43 8.36 4.690 0.68 1.50
SMV1233 4.21 11.87 6.430 0.81 1.20
SMV1234 8.36 7.95 3.960 1.15 0.80
SMV1235 15.85 8.78 4.570 2.15 0.60
SMV1236 22.89 9.62 5.230 3.59 0.50
SMV1237 61.40 14.51 6.780 8.90 0.25
V
alues extracted from measured performance.
For package inductance (L
S), refer to Table 1.
For more details, refer to the Skyworks Application Note,
Varactor SPICE Model for Approved RF VCO Applications, document number 200315.
DATA SHEET • SMV123x VARACTORS
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Figure 6. SC-70 Package Dimensions
Figure 7. SC-70 Tape and Reel Dimensions
DATA SHEET • SMV123x VARACTORS
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Figure 8. SC-79 Package Dimensions
Figure 9. SC-79 Tape and Reel Dimensions
DATA SHEET • SMV123x VARACTORS
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Figure 10. SOD-323 Package Dimensions
Figure 11. SOD-323 Tape and Reel Dimensions
DATA SHEET • SMV123x VARACTORS
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Figure 12. SOT-23 Package Dimensions
Figure 13. SOT-23 Tape and Reel Dimensions
DATA SHEET • SMV123x VARACTORS
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Figure 14. SOD-882 Package Dimensions
Figure 15. SOD-882 Tape and Reel Dimensions
DATA SHEET • SMV123x VARACTORS
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