Panasonic MA2X338 Datasheet

Variable Capacitance Diodes

MA2X338

Silicon epitaxial planar type

For CATV tuner

■ Features

•

Large capacitance ratio

•

Small series resistance r
mance index, Q of a circuit

■ Absolute Maximum Ratings Ta = 25°C

Parameter Symbol Rating Unit

Reverse voltage (DC) V

Peak reverse voltage

Forward current (DC) I

Junction temperature T

Storage temperature T

Note) * : RL = 10 kΩ

*

, resulting in obtaining high perfor-

D

R

V

RM

F

j

stg

150 °C

−55 to +150 °C

34 V

35 V

20 mA

INDICATES
CATHODE

12

+ 0.2

− 0.1

1.6

5°

0.30 to 0.05

+ 0.2

− 0.1

1.1

5°

Marking Symbol: 6H

Unit : mm

+ 0.2

2.7

− 0.1

3.3 ± 0.2

*(3.8 ± 0.2)

+ 0.1

− 0.03 0.55 ± 0.1

0.16

*( ): WL type

1 : Anode

Mini Type Package (2-pin)

2 : Cathode

■ Electrical Characteristics Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

Reverse current (DC) I

Diode capacitance C

Capacitance ratio

Diode capacitance deviation

Series resistance

*

R

D(2V)

C

D(25V)

C

D(10V)

C

D(17V)

C

D(2V)/CD(25V)

∆C

r

D

Note) 1．Rated input/output frequency: 470 MHz

  2．*: rf measuring instrument: YHP MODEL 4191A RF IMPEDANCE ANALYZER

VR = 30 V 10 nA

VR = 2 V, f = 1 MHz 27.13 32.15 pF

VR = 25 V, f = 1 MHz 2.60 3.15 pF

VR = 10 V, f = 1 MHz 7.05 9.97 pF

VR = 17 V, f = 1 MHz 3.48 4.74 pF

C

D(2V)(10V)(17V)(25V)

CD = 9 pF, f = 470 MHz 0.63 Ω

10 

2.5 %

1

MA2X338

Variable Capacitance Diodes

100

CD  V

50

)

pF

30

(

D

20

10

5

3

Diode capacitance C

2

1

0 8 16 24 324 1220283640

R

f = 1 MHz
T

a

Reverse voltage VR (V

IR  T

a

VR = 30 V

)
nA

(

100

10

R

1

= 25°C

)

IF  V

120

100

F

)

mA
(

80

F

60

40

Ta = 60°C

25°C

Forward current I

20

0

0 0.2 0.4 0.6 0.8 1.0 1.2

Forward voltage VF (V

− 40°C

)

CD  T

1.03

1.02

1.01

)

)

a

T
(

1.00

= 25°C

D

a

C

T
(

D

C

0.99

0.98

0.97
0 20 40 60 80 100

Ambient temperature Ta (°C

a

f = 1 MHz

VR = 2 V

10 V
17 V
25 V

)

0.1

Reverse current I

0.01
0 40 80 120 160 20020 60 100 140 180

Ambient temperature Ta (°C

CD rank classification

27.27
8

27.82
7

28.38
6

28.95
5

29.53
4

30.13
3

30.74
2

31.36

(pF)

1

31.99

D(2V)

C

)

Primary rank classification

C

(pF)

D(25V)

2.62

2.67

2.72

2.77

2.83

2.89

2.95

3.01

3.07

87654321

9

Note: Tracking guarantee range
(Capacitance deviation 2.5%)

3.13

Secondary rank classification

C

D(17V)

3.50

3.57

3.64

3.71

3.78

3.86

3.94

4.02

7.09

7.23

7.37

7.52

7.67

7.82

7.98

8.14

(pF)

8.30

8.47

D(10V)

8.64

C

8.81

8.99

9.17

9.35

9.54

9.73

9.92

15

14 13 12 11 10 9 8 7
17
16
15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

(pF)

4.10

4.18

4.26

4.35

654321

4.44

4.53

4.62

4.71

2