SMV1251 View Datasheet(PDF) - Alpha Industries
Part Name
Description
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SMV1251 Datasheet PDF : 4 Pages
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Hyperabrupt Tuning Varactors
SMV1247–SMV1255
Electrical Specifications at 25°C
Part
Number
CT
@ 0.3 V
(pF)
SMV1247
SMV1248
SMV1249
SMV1251
Min.
6.5
15.0
28.0
38.0
Typ.
7
17
31
42
SMV1253
SMV1255
48.0
53
58.0
64
Reverse Voltage VR (IR = 10 µA): 15 V
Reverse Current IR (VR = 12 V): 20 nA
CT
@ 4.7 V
(pF)
Typ.
Max.
0.7
0.78
1.5
1.70
2.6
2.80
3.4
3.80
4.3
4.80
5.2
5.80
CT
@ 1V
(pF)
Typ.
4.4
12.3
18.2
28.1
37.0
43.3
CT
@ 3V
(pF)
Typ.
0.95
2.60
3.40
5.80
7.80
8.50
CT @ 0.3 V
CT @ 4.7 V
(Ratio)
Min.
Typ.
9.5
10.0
10.8
12.0
11.0
12.1
11.0
12.2
11.0
12.3
11.0
12.3
CT @ 1 V RS @ 3 V
Q
CT @ 3 V 500 MHz @ 3 V
(Ratio)
(Ω) 50 MHz
Typ.
Max.
Typ.
4.6
2.0
1500
4.7
1.8
700
5.3
1.5
600
4.8
1.3
400
4.7
1.2
350
5.1
1.0
350
Typical Performance Data
100.0
10.0
SMV1255
SMV1253
SMV1251
SMV1249
1.0
SMV1248
SMV1247
0.1
0
2.0
4.0
6.0
8.0
Reverse Voltage (V)
Capacitance vs. Reverse Voltage
4.0
3.5
SMV1247
3.0
SMV1248
2.5
SMV1249
SMV1251
2.0
1.5
1.0
0.5
0
0
1
SMV1253
SMV1255
2
3
4
5
Reverse Voltage (V)
Series Resistance vs. Reverse Voltage
@ 500 MHz
3
2
VR = 1 V
1
0
-1
-2
VR = 4 V
-3
-40 -20 0 20 40 60 80
Temperature (˚C)
Relative Capacitance Change
vs. Temperature
15
10
5
0
-5
-10
-15
-20
-25
-50
-25
0
25 50
Temperature (˚C)
75 100
Relative Series Resistance Change
vs. Temperature @ 500 MHz
2
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 1/00A
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