Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com 1
Specifications subject to change without notice. 1/01A
Hyperabrupt Junction Tuning Varactor
Features
■High Capacitance Ratio
■Ultra Small Size SC-70 Package
■Designed for High Volume, Low Cost
Batter y Applications
■Available in Tape and Reel Packaging
SMV1269-074
Description
The SMV1269-074 is a dual silicon hyperabrupt junction
varactor diode in a common cathode configuration
specifically designed for battery operation.The specified
high capacitance ratio and low RSof this v ar actor mak e it
appropriate for low noise VCOs used at frequencies in
wireless systems to bey ond 2.5 GHz.Applications include
low noise and wideband UHF and VHF VCO f or GSM, PCS,
CDMA and analog phones.
Characteristic Value
Forward Current (IF) 20 mA
Power Dissipation (PD) 250 mW
Storage Temperature (TST) -55°C to +150°C
Operating Temperature (TOP) -55°C to +125°C
Absolute Maximum Ratings
Parameter Condition Min. Typ. Max. Unit
Reverse Current (IR)V
R= 8 V 20.0 nA
Capacitance (CT)C
T@ 0.5 V, VR= 0.5 V, F = 1 MHz 19.2 20.5 21.8 pF
Capacitance (CT)C
T@ 2.5 V, VR= 2.5 V, F = 1 MHz 6.5 7.3 8.1 pF
Capacitance Ratio (CTR)C
T(0.5 V)/CT(2.5 V) 2.5 2.8
Series Resistance (RS)V
R= 1 V, F = 900 MHz 0.6 0.8 Ω
Breakdown Voltage (VBR)I
R= 10 µA 10.0 V
Electrical Specifications at 25°C
Common Cathode Configuration
DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
RES
RS
R = RS
IND
LS
L = LS
CAP
CP
C = CP
PORT
P_anode
port = 1
PORT
P_Cathode
port = 2
DIODEM
Diode_Model
IS = 1.00e-14
RS = 0
N = 1
TT = 0
CJO = CJO
M = M
VJ
EG = 1.11
XTI = 3
KF =0
AF =1
FC = 0.5
BV = 0
IBV = 1e-3
ISR = 0
NR = 2
IKF = 0
NBV = 1
IBVL = 0
NBVL = 1
TBV1 = 0
TNOM = 27
FFE = 1
SPICE Model
Hyperabrupt Junction Tuning Varactor SMV1269-074
2Alpha Industries, Inc. [781] 935-5150 •Fax [617] 824-4579 •Email sales@alphaind.com •www.alphaind.com
Specifications subject to change without notice. 1/01A
Alpha Varactor (SMV1269-074)
0
5
10
15
20
25
30
012345
Voltage (V)
Capacitance (pF)
-40 -20 0 20 40 60 80
Temperature (˚C)
Relative Capacitance
Change vs. Temperature
Percent of Variation (%)
-4
-3
-2
-1
0
1
2
3
4
5
VVAR = 1 V
VVAR = 2.5 V
VVAR = 4 V
Typical Performance Data
3
2
1
0.031 (0.80 mm) MIN.
0.039 (1.00 mm) MAX.
0.000 (0.00 mm) MIN.
0.004 (0.10 mm) MAX.
0.010 (0.25 mm) MIN.
0.016 (0.40 mm) MAX.
0.071 (1.80 mm) MIN.
0.087 (2.20 mm) MAX.
0.071 (1.80 mm) MIN.
0.094 (2.40 mm) MAX. 0.045 (1.15 mm) MIN.
0.053 (1.35 mm) MAX.
0.026 (0.65 mm) REF.
0.051 (1.30 mm) REF.
0.004 (0.10 mm) MIN.
0.007 (0.18 mm) MAX.
0.004 (0.10 mm) MIN.
0.012 (0.30 mm) MAX.
0.014 (0.35 mm) REF.
SC-70
Capacitance vs. Voltage
VR (V) CT(pF)
029.0
0.2 25.3
0.4 22.4
0.6 20.1
0.8 18.0
1.0 16.2
1.2 14.6
1.4 13.2
1.6 11.9
1.8 10.7
2.0 9.6
2.2 8.7
2.4 7.8
2.6 7.0
2.8 6.3
3.0 5.7
3.2 5.2
3.4 4.8
3.6 4.4
3.8 4.1
4.0 3.9
4.2 3.7
4.4 3.5
4.6 3.3
4.8 3.2
5.0 3.1
Part CJO VJMCPRSLS
Number (pF) (V) (pF) (ΩΩ))(nH)
SMV1269-074 28.5 6.3 4.2 0.5 0.6 1.4
