Hyperabrupt Junction Tuning Varactors
SMV1129 and SMV1139
Features
I
High Q
I
Low Series Resistance for Low Phase
Noise
I
Multiple Packages SOD-323, SC-79
and SC-70
I
Designed for High Volume Commercial
Applications
I
SPICE Models are Available
Description
The SMV1129 and SMV1139 silicon hyperabrupt junction
varactor diodes are designed for use in VCOs requiring
low resistance. The low resistance of these varactors
makes them appropriate for high Q resonators in
wireless system VCOs to frequencies beyond 2.5 GHz.
Absolute Maximum Ratings
Characteristic
Forward Current (I
F
)
Power Dissipation (P
D
)
Storage Temperature (T
ST
)
Operating Temperature (T
OP
)
Value
20 mA
250 mW
-55°C to +150°C
-55°C to +125°C
Single
SOD-323
o
SMV1129-011
o
SMV1139-011
L
S
= 1.5 nH
o
Available through distribution.
For other packages or configurations, please contact the factory.
Single
SC-79
o
SMV1129-079
o
SMV1139-079
L
S
= 0.7 nH
Common Anode
SC-70
SMV1129-073
L
S
= 1.4 nH
Electrical Specifications at 25°C
Part
Number
Min.
SMV1129
SMV1139
Reverse Voltage V
R
(I
R
= 10
µA):
12 V
Reverse Current I
R
(V
R
= 10 V): 20 nA
C
T
@ 1 V
(pF)
Typ.
19.0
5.4
Max.
20.50
5.85
17.50
4.95
1.4
1.4
C
T
@ 1 V
C
T
@ 3 V
(Ratio)
Min.
Typ.
1.53
1.53
Min.
2.0
2.0
C
T
@ 1 V
C
T
@ 6 V
(Ratio)
Typ.
2.5
2.5
R
S
@ 1 V
500 MHz
Ω
(Ω)
Max.
0.4
0.6
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 10/99A
1
Hyperabrupt Junction Tuning Varactors
SMV1129 and SMV1139
Typical Performance Data
30
25
Capacitance vs. Reverse Voltage
SMV1129
V
R
(V)
0
1
2
3
4
C
T
(pF)
27.5
18.9
15.0
12.5
10.7
9.3
8.1
7.1
6.3
5.7
5.2
4.9
4.7
SMV1139
C
T
(pF)
8.0
5.5
4.4
3.7
3.1
2.7
2.5
2.3
2.2
2.1
2.0
2.0
1.9
Capacitance (pF)
20
15
10
5
0
0
2
SMV1139
4
6
8
10
SMV1129
5
6
7
8
9
10
11
12
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
SPICE Model
PORT
P_anode
port = 1
IND
L
S
L = L
S
DIODEM
Diode_Model
I
S
= 1.00e-14
R
S
= 0
N=1
T
T
= 0
C
JO
= C
JO
M=M
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
SOD-323
0.090 (2.30 mm) MIN.
0.108 (2.74 mm) MAX.
0.010
(0.25 mm) MIN.
0.016
(0.40 mm) MAX.
0.063 (1.60 mm) MIN.
0.071 (1.80 mm) MAX.
0.045 (1.15 mm) MIN.
0.053 (1.35 mm) MAX.
1
2
RES
R
S
R = R
S
DIODE
Varactor_Diode
AREA = 1
MODEL = Diode_Model
MODE = nonlinear
CAP
C
P
C = C
P
CATHODE
INDICATOR
0.008 (0.20 mm) NOM.
0.006
(0.15 mm) TYP.
0.050
(1.25 mm) MAX.
0.004 (0.10 mm) MAX.
0.010 (0.25 mm) MIN.
PORT
P_Cathode
port = 2
SC-79
Part
Number
SMV1129
SMV1139
C
JO
(pF)
27.5
8.0
V
J
(V)
2.8
1.2
M
1.10
0.65
C
P
(pF)
0
0
R
S
Ω
(Ω)
0.40
0.60
0.010
(0.25 mm) MIN.
0.014
(0.35 mm) MAX.
CATHODE 0.006 (0.15 mm) MIN.
INDICATOR
1
2
1. Values extracted from measured performance.
2. For package inductance (L
S
) refer to package type.
3. For more details refer to the “Varactor SPICE Models for RF VCO
Applications” Application Note.
0.028
(0.70 mm) MIN.
0.035
(0.90 mm) MAX.
0.060 (1.50 mm) MIN.
0.067 (1.70 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.
10˚ MAX.
10˚ MAX.
0.003
(0.07 mm) MIN.
0.008
(0.20 mm) MAX.
2
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 10/99A
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