Panasonic MA2C840 Datasheet

Variable Capacitance Diodes

1st Band
2nd Band

φ 0.45 max.

φ 1.75 max.

13 min.

0.2 max.0.2 max.

13 min.

2.2 ± 0.3

COLORED BAND
INDICATES
CATHODE

2

1

MA2C840

Silicon epitaxial planar type

For AFC of UHF and VHF electronic tuner

■ Features

•

Super-small envelope (DO-34), allowing to insert into a 5 mm
pitch hole.

•

Small series resistance r

•

Large variable capcitance range

■ Absolute Maximum Ratings Ta = 25°C

Parameter Symbol Rating Unit

Reverse voltage (DC) V

Peak forward current V

Junction temperature T

Storage temperature T

D

R

RM

j

stg

32 V

34 V

150 °C

−55 to +150 °C

Unit : mm

1 : Anode
2 : Cathode

JEDEC : DO-34

■ Electrical Characteristics Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

Forward current (DC) V

Reverse current (DC) I

Reverse current (DC) C

Capacitance ratio

*

Series resistance r

F

R

t

C

t(2V)/Ct(10V)

C

t(6V)/Ct(10V)

D

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

  2．*: C

t(2V)/Ct(10V)

, C

t(6V)/Ct(10V)

rank classification table

Class A B M

C

t(2V)/Ct(10V)

C

t(6V)/Ct(10V)

2.5 to 3.0 2.8 to 3.4 2.8 to 3.4

>1.64

■ Cathode Indication

Class A B M

1st band Light Blue Light Blue Light Blue

2nd band White Green Light Blue

IF = 100 mA 1.1 V

VR = 30 V 10 nA

VR = 2 V, f = 1 MHz 10.5 16 pF

VR = 10 V, f = 1 MHz 3.3 5.7

2.5 3.4 

1.64 

CD = 9 pF, f = 470 MHz 1.2 Ω

1

MA2C840

Variable Capacitance Diodes

IF  V

3

10

2

10

)

mA

(

F

10

Ta = 125°C − 20°C

1

Forward current I

−1

10

−2

10

0 0.2 0.4 0.6 0.8 1.0 1.2

F

Forward voltage VF (V

Ct  V

32

28

)

pF

24

(

t

20

16

12

8

Terminal capacitance C

4

R

25°C75°C

)

f = 1 MHz

= 25°C

T

a

3

10

)

2

10

nA
(

R

10

1

Reverse current I

−1

10

0 8 20 28 324121624

IR  V

Reverse voltage VR (V

 T

1

0.5

)

0.3

nA
(

0.2

R

0.1

0.05

Reverse current I

0.03

0.02

IR

R

Ta = 25°C

a

)

VR = 28 V

1.06

Ct  T

1.05

1.04

)

1.03

)

a

T

1.02

(

= 25°C

t

a

C

T
(

t

1.01

C

1.00

0.99

0.98

−40 0 40 80 120 160 200

Ambient temperature Ta (°C

VR = 2 V

a

f = 1 MHz

10 V

)

0

0.1

1100.3 3 30 100

Reverse voltage VR (V

Ct rank classification

3.0

3.5

4.0

16

C

/ C

= 3.4

t(2V)

t(10V)

15

14

(pF)

t(2V)

13

C

12

11

10

2

0.01

)

C

(pF)

t(10V)

4.5

5.0

5.5

6.0

0 20406080100

Ambient temperature Ta (°C

)

3.0

2.8

2.5