1T404A
Variable Capacitance Diode
Description
M-290
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
• Large capacitance ratio 11.5 Typ. (C2/C25)
• Small leakage current 10nA Max. (VR = 28V)
0.75Ω Max. (f = 470MHz)
Absolute Maximum Ratings (Ta = 25°C)
• Capacitance deviation in a matching group within 2%
• Reverse voltage
VR
34
V
°C
°C
• Operating temperature Topr
–20 to +75
Applications
• Storage temperature
Tstg –65 to +150
Electronic tuning of wide-band CATV tuners
Structure
Silicon epitaxial planar type diode
Electrical Characteristics
(Ta = 25°C)
Item
Symbol
Conditions
IR = 1µA
Min. Typ. Max. Unit
Reverse voltage
Reverse current
VR
34.0
V
10.0 nA
33.5 pF
2.90 pF
IR
VR = 28V
C2
VR = 2V, f = 1MHz
VR = 25V, f = 1MHz
29.5
Diode capacitance
C25
C2/C25
C25/C28
rs
2.60
11.0 11.5
1.03
Capacitance ratio
Series resistance
CD = 14pF, f = 470MHz
VR = 2 to 25V, f = 1MHz
0.75
2.0
Ω
Capacitance deviation in a matching group
∆C
%
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.
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E99805-PS
