Page 1
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com 1
Specifications subject to change without notice. 1/01A
Hyperabrupt Junction Tuning Varactor
Features
■ High Capacitance Ratio at Low
Reverse Voltage
■ Ultra Small SC-79 Package
■ Designed for High Volume, Low Cost
Battery Applications
■ Available in Tape and Reel Packaging
SMV1263-079
Description
The SMV1263-079 is a silicon hyperabrupt junction varactor
diode specifically designed for 3 V platforms.The specified
high capacitance ratio and low RSof this varactor make it
attractive for lo w phase noise VCOs in wireless systems up
to and beyond 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
= 15 V 20.0 nA
Capacitance (CT)C
T
@ 0.5 V, VR= 0.5 V, F = 1 MHz 6.2 6.7 7.2 pF
Capacitance (CT)C
T
@ 2.5 V, VR= 2.5 V, F = 1 MHz 2.3 2.6 2.9 pF
Capacitance Ratio (CTR)C
T
(0.5 V)/CT(2.5 V) 2.3 2.5
Series Resistance (RS)V
R
= 1 V, F = 900 MHz 1.2 Ω
Breakdown V oltage (VBR)I
R
= 10 µA20.0 V
Electrical Specifications at 25°C
Page 2
Hyperabrupt Junction Tuning Varactor SMV1263-079
2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 1/01A
Capacitance vs. Voltage
0
3.00
6.00
9.00
0123 45
Varactor Voltage (V)
Capacitance (pF)
Temperature (˚C)
Relative Capacitance
Change vs. Temperature
Percentage of Variation (%)
-4
-3
-2
-1
0
1
2
3
4
5
-40 -20 0 20 40 60 80
V
VAR
= 1 V
V
VAR
= 2.5 V
V
VAR
= 4 V
Typical Performance Data
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.
CATHODE
INDICATOR
12
SC-79
DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
RES
R
S
R = R
S
IND
L
S
L = L
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
EG = 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
SPICE Model
VR(V) CT(pF)
0.00 8.87
0.25 7.68
0.50 6.68
0.75 5.83
1.00 5.11
1.25 4.50
1.50 3.99
1.75 3.54
2.00 3.17
2.25 2.84
2.50 2.57
2.75 2.33
3.00 2.12
3.25 1.94
3.50 1.79
3.75 1.65
4.00 1.54
4.25 1.44
4.50 1.35
4.75 1.27
5.00 1.20
Part C
J0
V
J
M
C
P
R
S
L
S
Number (pF) (V) (pF) (
ΩΩ))
(nH)
SMV1263-079 8.2 15 9.5 0.67 1.2 1.7
Capacitance vs. Voltage
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