PANASONIC MA2C840

Variable Capacitance Diodes
MA2C840
Silicon epitaxial planar type
Unit : mm
For AFC of UHF and VHF electronic tuner
φ 0.45 max.
2.2 ± 0.3
1st Band
2nd Band
Symbol
Rating
Unit
Reverse voltage (DC)
VR
32
V
Peak forward current
VRM
34
V
Junction temperature
Tj
150
°C
Storage temperature
Tstg
−55 to +150
°C
13 min.
■ Absolute Maximum Ratings Ta = 25°C
Parameter
13 min.
1
0.2 max.
• Super-small envelope (DO-34), allowing to insert into a 5 mm
pitch hole.
• Small series resistance rD
• Large variable capcitance range
COLORED BAND
INDICATES
CATHODE
0.2 max.
■ Features
2
φ 1.75 max.
1 : Anode
2 : Cathode
JEDEC : DO-34
■ Electrical Characteristics Ta = 25°C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Forward current (DC)
VF
IF = 100 mA
1.1
V
Reverse current (DC)
IR
VR = 30 V
10
nA
Reverse current (DC)
Ct
VR = 2 V, f = 1 MHz
10.5
16
pF
VR = 10 V, f = 1 MHz
3.3
5.7
Ct(2V)/C t(10V)
2.5
3.4
Ct(6V)/C t(10V)
1.64
Capacitance ratio*
Series resistance
rD
CD = 9 pF, f = 470 MHz


1.2
Ω
Note) 1．Rated input/output frequency: 470 MHz
2．* : Ct(2V)/Ct(10V), Ct(6V)/Ct(10V) rank classification table
Class
Ct(2V)/Ct(10V)
Ct(6V)/Ct(10V)
A
2.5 to 3.0

B
2.8 to 3.4

M
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
1
MA2C840
Variable Capacitance Diodes
IF  V F
Ct  Ta
IR  V R
103
103
1.06
Ta = 25°C
f = 1 MHz
1.05
25°C
Ta = 125°C
1
− 20°C
10−1
102
VR = 2 V
1.04
10 V
Ct(Ta)
Ct (Ta = 25°C)
75°C
10
Reverse current IR (nA)
Forward current IF (mA)
102
10
1
1.03
1.02
1.01
1.00
0.99
10−2
10−1
0
0.2
0.4
0.6
0.8
1.0
1.2
0
4
8
Ct  VR
Reverse current IR (nA)
Terminal capacitance Ct (pF)
16
12
8
0
0.1
0.3
1
3
10
30
100
Reverse voltage VR (V)
Ct(2V) (pF)
6.0
5.5
5.0
4.5
4.0
Ct(2V) / Ct(10V) = 3.4
3.0
2.8
11
10
2
3.5
3.0
Ct(10V) (pF)
12
0.3
0.2
0.1
0.05
0.03
0.01
0
20
40
60
80
2.5
0.98
−40
0
40
80
120
160
Ambient temperature Ta (°C)
VR = 28 V
Ambient temperature Ta (°C)
Ct rank classification
13
32
0.02
4
14
28
0.5
20
15
24
IR  Ta
24
16
20
1
f = 1 MHz
Ta = 25°C
28
16
Reverse voltage VR (V)
Forward voltage VF (V)
32
12
100
200