Document
Variable Capacitance Diodes
MA2X338
Silicon epitaxial planar type
For CATV tuner I Features
• Large capacitance ratio • Small series resistance rD, resulting in obtaining high performance index, Q of a circuit
5°
1.6 − 0.1
+ 0.2
INDICATES CATHODE
Unit : mm
1
2
2.7 − 0.1 3.3 ± 0.2 *(3.8 ± 0.2)
+ 0.2
1.1 − 0.1
I Absolute Maximum Ratings Ta = 25°C
Parameter Reverse voltage (DC) Peak reverse voltage* Forward current (DC) Junction temperature Storage temperature Note) * : RL = 10 kΩ Symbol VR VRM IF Tj Tstg Rating 34 35 20 150 −55 to +150 Unit V V mA °C °C
+ 0.2
0.3
0 to 0.05
5°
*(
): WL type
1 : Anode 2 : Cathode Mini Type Package (2-pin)
Marking Symbol: 6H
I Electrical Characteristics Ta = 25°C
Parameter Reverse current (DC) Diode capacitance Symbol IR CD(2V) CD(25V) CD(10V) CD(17V) Capacitance ratio Diode capacitance deviation Series resistance* CD(2V)/CD(25V) ∆C rD CD(2V)(10V)(17V)(25V) CD = 9 pF, f = 470 MHz VR = 30 V VR = 2 V, f = 1 MHz VR = 25 V, f = 1 MHz VR = 10 V, f = 1 MHz VR = 17 V, f = 1 MHz 27.13 2.60 7.05 3.48 10 2.5 0.63 Conditions Min Typ Max 10 32.15 3.15 9.97 4.74 Unit nA pF pF pF pF % Ω
Note) 1 Rated input/output frequency: 470 MHz 2 * : rf measuring instrument: YHP MODEL 4191A RF IMPEDANCE ANALYZER
0.16 − 0.03
+ 0.1
0.55 ± 0.1
1
MA2X338
CD VR
100 f = 1 MHz Ta = 25°C
Variable Capacitance Diodes
IF V F
120
1.03
CD Ta
f = 1 MHz
50
100
1.02 VR = 2 V
Diode capacitance CD (pF)
30 20
Forward current IF (mA)
CD(Ta) CD(Ta = 25°C)
80
Ta = 60°C 25°C − 40°C
1.01 10 V 17 V 25 V
10
60
1.00
5 3 2
40
0.99
20
0.98
1
0
4
8 12 16 20 24 28 32 36 40
0
0
0.2
0.4
0.6
0.8
1.0
1.2
0.97
0
20
40
60
80
100
Reverse voltage VR (V)
Forward voltage VF (V)
Ambient temperature Ta (°C)
IR Ta
100 VR = 30 V
Reverse current IR (nA)
10
1
0.1
0.01
0 20 40 60 80 100 120 140 160 180 200
Ambient temperature Ta (°C)
CD rank classification Primary rank classification
CD(25V) (pF)
2.62 2.67 2.72 2.77 2.83 2.89 2.95 3.01 3.07 3.13
Secondary rank classification
CD(17V) (pF)
2
CD(2V) (pF)
CD(10V) (pF)
27.27 27.82 28.38 28.95 29.53 30.13 30.74 31.36 31.99
8 7 6 5 4 3 2 1
9 8 7 6 5 4 3 2 1 Note: Tracking guarantee range (Capacitance deviation 2.5%)
7.09 7.23 7.37 7.52 7.67 7.82 7.98 8.14 8.30 8.47 8.64 8.81 8.99 9.17 9.35 9.54 9.73 9.92
17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
3.50 3.57 3.64 3.71 3.78 3.86 3.94 4.02 4.10 4.18 4.26 4.35 4.44 4.53 4.62 4.71
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
.