Sony 1T404A Datasheet
Variable Capacitance Diode
Description
The 1T404A is a variable capacitance diode designed
for electronic tuning of wide-band CATV tuners using
a super-small-miniature flat package (SSVC).
Features
• Super-small-miniature flat package
• Low series resistance 0.75Ω Max. (f = 470MHz)
• Large capacitance ratio 11.5 Typ. (C2/C25)
• Small leakage current 10nA Max. (VR = 28V)
• Capacitance deviation in a matching group within 2%
Applications
Electronic tuning of wide-band CATV tuners
Structure
Silicon epitaxial planar type diode
Absolute Maximum Ratings (Ta = 25°C)
• Reverse voltage VR 34 V
• Operating temperature Topr –20 to +75 °C
• Storage temperature Tstg –65 to +150 °C
– 1 –
E99805-PS
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
1T404A
M-290
Electrical Characteristics (Ta = 25°C)
Reverse voltage
Reverse current
Diode capacitance
Capacitance ratio
Series resistance
Capacitance deviation in a matching group
VR
IR
C2
C25
C2/C25
C25/C28
rs
∆C
IR = 1µA
VR = 28V
VR = 2V, f = 1MHz
VR = 25V, f = 1MHz
CD = 14pF, f = 470MHz
VR = 2 to 25V, f = 1MHz
34.0
29.5
2.60
11.0
1.03
11.5
10.0
33.5
2.90
0.75
2.0
V
nA
pF
pF
Ω
%
UnitMax.Typ.Min.ConditionsSymbolItem
– 2 –
1T404A
1 2 5 10 20 50
1
2
5
10
20
50
100
Diode capacitance vs. Reverse voltage
VR – Reverse voltage [V]
C – Diode capacitance [pF]
Ta = 25°C
100
1
10
100
Reverse current vs. Ambient temperature
–20 0 20 40 60 80
Ta – Ambient temperature [°C]
I
R
– Reverse current [pA]
VR = 28V
0.60
0.80
Forward voltage vs. Ambient temperature
–20 0 20 40 60 80
Ta – Ambient temperature [°C]
V
F
– Forward voltage [V]
IF = 1mA
0.70
0.50
Ta – Ambient temperature [°C]
40
50
Reverse voltage vs. Ambient temperature
–20 0 20 40 60 80
V
R
– Reverse voltage [V]
45
35
IR = 10µA
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