DATA SHEET
SMV1800-079LF: Hyperabrupt Junction Tuning Varactor
Applications
•
Satellite tuners
•
VCOs
•
Tuneable couplings
Features
•
Cross to NXP’s BB181
•
Low series resistance
•
High capacitance ratio
•
Ultra-small SC-79 package (MSL1, 260
°C
per
JEDEC J-STD-020)
Description
The SMV1800-079LF is a silicon hyperabrupt junction varactor
diode specifically designed for battery operation. The specified
high capacitance ratio and low series resistance make this
varactor appropriate for low phase noise Voltage-Controlled
Oscillators (VCOs) used at frequencies in wireless systems up to
and above 2.5 GHz.
Applications for the SMV1800-079LF include low-noise and
wideband UHF and VHF VCOs for GSM, PCS, CDMA, and analog
phones. Table 1 describes the package and marking of the
SMV1800-079LF varactor.
Table 1. Packaging and Marking
Single
SC-79
Green™
SMV1800-079LF
Marking: Cathode
L
S
= 0.7 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.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200916F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 20, 2012
1
DATA SHEET • SMV1800-079LF VARACTOR
Table 2. SMV1800-079LF Absolute Maximum Ratings
Parameter
Reverse voltage
Forward current
Power dissipation
Operating temperature
Storage temperature
Note:
Symbol
V
R
I
F
P
DIS
T
OP
T
STG
Minimum
Typical
Maximum
30
20
250
Units
V
mA
mW
°C
°C
–55
–55
+125
+150
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.
Attention: Observe Precautions for Handling Electrostatic Sensitive Devices
ESD Man-Machine (MM) Model = 400 V (ClassC)
ESD Human Body Model (HBM) = 8 kV (Class 3B)
ESD Charged Device Model (CDM) = 2 kV (Class 4)
Electrostatic Discharge (ESD) can damage this device, which must be protected from ESD at all times. 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. SMV1800-079LF Electrical Specifications (Note 1)
(T
OP
= 25
°C,
Unless Otherwise Noted)
Parameter
Reverse current
Capacitance
I
R
C
T
Symbol
Test Condition
V
R
= 30 V
f = 1 MHz
V
R
= 0.5 V
V
R
= 28 V
Capacitance ratio
Series resistance
Breakdown voltage
C
TR
R
S
V
BR
C
T
@ 0.5 V/C
T
@ 28 V
f = 470 MHz, V
R
= 1.5 V
I
R
= 10
μA
30
10.25
0.70
12
14.25
1.05
16
3
pF
pF
–
Ω
V
Min
Typical
Max
10
Units
nA
Note 1:
Performance is guaranteed only under the conditions listed in this Table.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SMV1800-079LF varactor
are provided in Table 2. Electrical specifications are provided in
Table 3. Typical capacitance values are listed in Table 4. The
relationship between capacitance and reverse voltage is
illustrated in Figure 1.
The SPICE model for the SMV1800-079LF varactor is shown in
Figure 2 and the associated model parameters are provided in
Table 5.
Package dimensions are shown in Figure 3, and tape and reel
dimensions are provided in Figure 4.
Otherwise, problems related to moisture absorption may occur
when the part is subjected to high temperature during solder
assembly.
The SMV1800-079LF varactor is rated to Moisture Sensitivity
Level 1 (MSL1) at 260
°C.
It 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.
Package and Handling Information
Instructions on the shipping container label regarding exposure to
moisture after the container seal is broken must be followed.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
November 20, 2012 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200916F
DATA SHEET • SMV1800-079LF VARACTOR
Table 4. Capacitance vs Reverse Voltage
V
R
(V)
0
0.5
1.0
2.0
4.0
6.0
8.0
10.0
15.0
20.0
25.0
28.0
30.0
C
T
(pF)
15.78
12.45
10.43
7.87
4.85
3.07
2.17
1.72
1.26
1.06
0.93
0.88
0.84
Typical Performance Characteristics
Figure 1. Capacitance vs Reverse Voltage
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200916F • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • November 20, 2012
3
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