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DATA SHEET
SMV1247-SMV1255 Series: Hyperabrupt Junction Tuning
Varactors
Applications
Low tuning voltage VCOs
High-volume commercial systems
Features
High capacitance ratio: C0.3V/C4.7V = 12 typical
Packages rated MSL1, 260 °C per JEDEC J-STD-020
Skyworks Green™ products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of Green™, document number
SQ04-0074.
Description
The SMV1247-SMV1255 group of silicon hyperabrupt junction
varactor diodes is designed for use in Voltage Controlled
Oscillators (VCOs) with a low tuning voltage operation. This group
of varactors is characterized for capacitance and resistance over
temperature.
Table 1 describes the various packages and markings of the
SMV1247 to SMV1255 varactors.
DATA SHEET • SMV1247-SMV1255 VARACTORS
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Table 1. Packaging and Marking
Single Single Single Common Anode Common Cathode Single
SC-79
Green™
SOD-323
Green™
SOT-23 SOT-23 SOT-23 SOD-882
Green™
♦SMV1247-079LF
Marking: Cathode
SMV1247-011LF
Marking: GF
SMV1247-040LF
Marking: H
SMV1248-079LF
Marking: Cathode
SMV1248-001
Marking: BG1
SMV1248-001LF
Green™
Marking: GG1
SMV1248-040LF
Marking: 8
SMV1249-001
Marking: AF1
SMV1249-003
Marking: AF9
SMV1249-004
Marking: AF3
♦SMV1249-079LF
Marking: Cathode
SMV1249-011LF
Marking: EF
SMV1249-001LF
Green™
Marking: EF1
SMV1249-003LF
Green™
Marking: EF9
SMV1249-004LF
Green™
Marking: EF3
SMV1249-040LF
Marking: K
SMV1251-004
Marking: AH3
SMV1251-079LF
Marking: Cathode
SMV1251-011LF
Marking: EH
SMV1251-001LF
Green™
Marking: EH
SMV1251-004LF
Green™
Marking: EH3
SMV1251-040LF
Marking: EH1
SMV1253-004
Marking: AJ3
SMV1253-040LF
Marking: 3
SMV1253-079LF
Marking: Cathode
SMV1253-011LF
Marking: EJ
SMV1253-004LF
Green™
Marking: EJ3
SMV1255-001
Marking: AK1
SMV1255-040LF
Marking: 4
♦SMV1255-079LF
Marking: Cathode
SMV1255-011LF
Marking: EK
SMV1255-001LF
Green™
Marking: EK1
SMV1255-004LF
Green™
Marking: EK3
LS = 0.7 nH LS = 1.5 nH LS = 1.5 nH LS = 1.5 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.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SMV1247-SMV1255 group
of 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 SMV1247-SMV1255
varactors are illustrated in Figures 1 through 4.
The SPICE model for the SMV1247-SMV1255 varactors is shown
in Figure 5 and the associated model parameters are provided in
Table 5.
Package dimensions are shown in Figures 6 to 12 (even
numbers), and tape and reel dimensions are provided in Figures 7
to 13 (odd numbers).
DATA SHEET • SMV1247-SMV1255 VARACTORS
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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 SMV1247-SMV1255 group 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. SMV1247-SMV1255 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
Electrostatic discharge:
Charged Device Model (CDM), Class 4
Human Body Model (HBM), Class 1A
Machine Model (MM), Class A
ESD
1000
250
<50
V
V
V
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.
Table 3. SMV1247-SMV1255 Electrical Specifications (Note 1)
(TOP = 25 C, Unless Otherwise Noted)
Part Number CT
@ 0.3 V
(pF)
CT
@ 4.7 V
(pF)
CT
@ 1 V
(pF)
CT
@ 3 V
(pF)
CT @ 0.3 V
CT @ 4.7 V
(Ratio)
CT @ 1 V
CT @ 3 V
(Ratio)
RS @ 3 V,
500 MHz
(Ω)
Q @ 3
V,
50 MHz
Min. Typical Typical Max. Typical Typical Min. Typical Typical Max. Typical
SMV1247 6.5 7 0.7 0.78 4.4 0.95 9.5 10.0 4.6 6.0 1500
SMV1248 15.0 17 1.5 1.70 12.3 2.60 10.8 12.0 4.7 3.3 700
SMV1249 28.0 31 2.6 2.80 18.2 3.40 11.0 12.1 5.3 2.2 600
SMV1251 38.0 42 3.4 3.80 28.1 5.80 11.0 12.2 4.8 1.6 400
SMV1253 48.0 53 4.3 4.80 37.0 7.80 11.0 12.3 4.7 1.4 350
SMV1255 58.0 64 5.2 5.80 43.3 8.50 11.0 12.3 5.1 1.3 350
Note 1: Performance is guaranteed only under the conditions listed in this table.
Reverse voltage VR (IR = 10 μA) = 15 V minimum
Reverse current IR (VR = 12 V) = 20 nA maximum
DATA SHEET • SMV1247-SMV1255 VARACTORS
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Table 4. Capacitance vs Reverse Voltage
VR
(V)
CT (pF)
SMV1247 SMV1248 SMV1249 SMV1251 SMV1253 SMV1255
0 8.86 22.62 37.35 53.65 69.32 81.21
0.5 6.17 16.32 25.88 38.23 50.23 58.28
1.0 4.37 12.33 18.18 28.09 37.07 43.27
1.5 2.96 9.12 12.08 20.13 27.57 31.49
2.0 1.88 6.27 7.27 13.55 19.37 21.50
2.5 1.22 3.93 4.44 8.60 12.39 13.40
3.0 0.95 2.57 3.40 5.78 7.77 8.51
3.5 0.83 1.95 2.96 4.57 5.77 6.51
4.0 0.77 1.71 2.72 3.95 4.86 5.58
4.5 0.73 1.59 2.51 3.58 4.34 5.07
5.0 0.70 1.49 2.38 3.33 4.01 4.76
5.5 0.68 1.44 2.30 3.16 3.78 4.58
6.0 0.67 1.40 2.24 3.03 3.62 4.46
6.5 0.66 1.36 2.19 2.94 3.50 4.39
7.0 0.65 1.33 2.14 2.88 3.41 4.33
7.5 0.64 1.31 2.09 2.83 3.34 4.29
8.0 0.64 1.30 2.03 2.79 3.28 4.26
DATA SHEET • SMV1247-SMV1255 VARACTORS
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Typical Performance Characteristics
0.1
1.0
10.0
100.0
6.0 8.04.0
Reverse Voltage (V)
2.00
Capacitance (pF)
SMV1255
SMV1248
SMV1247
SMV1253
SMV1251
SMV1249
Figure 1. Capacitance vs Reverse Voltage
–3
–2
–1
0
+1
+2
+3
–40 –20 0 +20 +40 +60 +80
Percentage Change (%)
Temperature (°C)
V
R
= 4 V
V
R
= 1 V
Figure 3. Relative Capacitance Change vs Temperature
Reverse Voltage (V)
01 2 3 45
Series Resistance (Ω)
0
2
4
6
8
10
SMV1247
SMV1248
SMV1249
SMV1251
SMV1253
SMV1255
Figure 2. Series Resistance vs Reverse Voltage @ 500 MHz
–50 –25 0 +25 +50 +75 +100
Percentage Change (%)
Temperature (°C)
–25
–20
–10
–15
–5
0
+5
+10
+15
Figure 4. Relative Series Resistance Change vs Temperature
@ 500 MHz
DATA SHEET • SMV1247-SMV1255 VARACTORS
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DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
IND
L
S
L = L
S
RES
R
S
R = R
S
CAP
C
P
C = C
P
PORT
P_anode
port = 1
PORT
P_Cathode
port = 2
DIODEM
Diode_Model
I
S
= 1.00e-14
R
S
= 0
N = 1
T
T
= 0
C
JO
= C
JO
M = M
V
J
= V
J
E
G
= 1.11
X
TI
= 3
K
F
=0
A
F
=1
F
C
= 0.5
B
V
= 0
I
BV
= 1e-3
I
SR
= 0
N
R
= 2
I
KF
= 0
N
BV
= 1
I
BVL
= 0
N
BVL
= 1
T
BV1
= 0
T
NOM
= 27
F
FE
= 1
S1672
Figure 5. SPICE Model
Table 5. SPICE Model Parameters
Part Number CJO
(pF)
VJ
(V)
M CP
(pF)
RS
(Ω)
SMV1247 8.47 80 70 0.54 4.9
SMV1248 22.12 138 100 0.87 2.4
SMV1249 36.40 80 70 1.68 1.7
SMV1251 52.48 100 76 2.00 1.4
SMV1253 68.30 100 71 2.00 1.1
SMV1255 80.00 135 100 2.74 1.0
Model was designed to fit measured data in the range of up to 4 V.
For package inductance (LS), 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 • SMV1247-SMV1255 VARACTORS
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0.060 (1.50 mm) Min.
0.067 (1.70 mm) Max.
0.010
(0.25 mm) Min.
0.014
(0.35 mm) Max.
0.043 (1.10 mm) Min.
0.051 (1.30 mm) Max.
0.020
(0.50 mm) Min.
0.028
(0.70 mm) Max.
0.003
(0.07 mm) Min.
0.008
(0.20 mm) Max.
10° Max.
10° Max.
0.028
(0.70 mm) Min.
0.035
(0.90 mm) Max.
0.006 (0.15 mm) Min.
Polarity
Indicator Area
12
S1652Dimensions are in inches (millimeters shown in parentheses)
Box
or
Bar
Figure 6. SC-79 Package Dimensions
S2929
Notes:
1. Carrier tape: black conductive polycarbonate or polystyrene.
2. Cover tape material: transparent conductive PSA.
3. Cover tape size: 5.4 mm width.
4. ESD-surface resistivity is ≤1 x 108 Ohms/square per
EIA, JEDEC TNR Specification.
4. All measurements are in millimeters.
8.00 ± 0.20
0.229 ± 0.02 (T)
3.50 ± 0.05
A
B
Ø1.50± 0.10
Ø0.50± 0.05
4.00 ± 0.10 4.00 ± 0.10 2.00 ± 0.05
0.80 ± 0.05 (Ko)
1.95 ± 0.05 (Bo)
1.40 ± 0.05
0.39 ± 0.05
0.90 ± 0.05 (Ao)
1.75 ± 0.10
2
o
Max
2° Max
A
B
B
A
Pin 1 Indicator
Figure 7. SC-79 Tape and Reel Dimensions
DATA SHEET • SMV1247-SMV1255 VARACTORS
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12
0.090 (2.29 mm) Min.
0.107 (2.72 mm) Max. 0.000 (0 mm) Min.
0.004 (0.10 mm) Max.
0.012 (0.305 mm) Min.
0.016 (0.406 mm) Max.
0.036 (0.91 mm) Min.
0.046 (1.17 mm) Max.
0.010 (0.25 mm) Min.
0.018 (0.46 mm) Max.
0.005 (0.127 mm) Min.
0.008 (0.203 mm) Max.
0.044
(1.12 mm) Min.
0.054
(1.37 mm) Max.
0.025
(0.635 mm) Min.
0.037
(0.940 mm) Max.
0.013
(0.33 mm) Min.
0.017
(0.43 mm) Max.
Cathode
Indicator
0.008 Ref.
Gauge Datum
For Foot Length
Measurement
0.060 (1.52 mm) Min.
0.070 (1.78 mm) Max.
S1619
Dimensions are in inches (millimeters shown in parentheses)
Figure 8. SOD-323 Package Dimensions
S2910
Pin 1
Indicator
2.00 ± 0.05
0.30 ± 0.05
4.00
4.00
(See Note 4)
1.52 (Ao)
2.90 (Bo)
1.35 (Ko)
1.07 (K1)
2.08
0.84
R0.5 Typ.
R0.3 Max.
Ø1.50 +0.1/–0
Ø1.00 Min.
8.00 +0.30/–0.10
3.50 ± 0.05
1.75 ± 0.10
A
Notes:
1. Carrier tape: black conductive polystyrene.
2. Cover tape: transparent conductive PSA.
3. Cover tape size: 5.4 mm width.
4. 10 sprocket hole pitch cumulative tolerance: ±0.20 mm.
5. All measurements are in millimeters.
A
A
Figure 9. SOD-323 Tape and Reel Dimensions
DATA SHEET • SMV1247-SMV1255 VARACTORS
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All dimensions in millimeters
0.650
Cathode
Indicator
Cathode
Terminal
1.000
Bottom View
Side View
Top View
2X 0.25 ± 0.05
2X 0.50 ± 0.05
0.46 +0.04/–0.06
0.05/0.00
0.600
0.325
S1892
Figure 10. SOD-882 Package Dimensions
S1922
A
B
2.00 ± 0.05 ∅1.55 ± 0.05 (D0)
∅0.40 ± 0.05 (D1)
Cathode
Indicator
0.20
1.15 ± 0.05 (Bo)
0.70 ± 0.05 (A0)
4.00 ± 0.10
A
BB A
2.00 ± 0.05
0.47 ± 0.05 (Ko)
1.75 ± 0.10
3.50 ± 0.05
8.00 ± 0.1
Notes:
1. Carrier tape: black conductive polycarbonate.
2. Cover tape: transparent conductive material.
3. Cover tape size: 5.4 mm width.
4. ESD surface resistivity is ≥1 x 10
4
~ ≤ 1 x 10
8
Ohms/square.
5. All dimensions are in millimeters.
Figure 11. SOD-882 Tape and Reel Dimensions
DATA SHEET • SMV1247-SMV1255 VARACTORS
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3
2
1
0.035 (0.89 mm) Min.
0.044 (1.12 mm) Max.
0.0005 (0.01 mm) Min.
0.004 (0.10 mm) Max.
0.012 (0.30 mm) Min.
0.020 (0.50 mm) Max.
0.003 (0.080 mm) Min.
0.008 (0.20 mm) Max.
8° Max.
0.022 (0.55 mm) Ref.
0.110 (2.80 mm) Min.
0.120 (3.04 mm) Max.
0.083 (2.10 mm) Min.
0.104 (2.64 mm) Max.
0.037 (0.95 mm) Ref.
0.047 (1.20 mm) Min.
0.055 (1.40 mm) Max.
0.076 (1.92 mm) Ref.
0.020 (0.51 mm) Ref.
S1389
Dimensions are in inches (millimeters shown in parentheses)
Figure 12. SOT-23 Package Dimensions
Notes:
1. Carrier tape: black conductive polycarbonate.
2. Cover tape material: transparent conductive PSA.
3. Cover tape size: 5.40 mm width.
4. Tolerance ±0.10 mm.
5. Ten sprocket hole pitch cumulative tolerance: ±0.2 mm.
6. All measurements are in millimeters.
3.10 (Ao)
1.0
2.2
2.70 (Bo)
8.00 + 0.3/–0.1
4.00
4.00
(See Note 5)
2.00 ± 0.05
3.50 ± 0.05
1.75 ± 0.10
A
A
A
0.25 ± 0.05
0.8 ± 0.05
1.20 (Ko)
Ø1.00 Min.
R 0.5 Typ. Pin 1 Indicator
Ø1.5 + 0.1/–0
S1684b
R 0.3 Max
Figure 13. SOT-23 Tape and Reel Dimensions
DATA SHEET • SMV1247-SMV1255 VARACTORS
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