1T408
Variable Capacitance Diode
Description
M-290
The 1T408 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
• Small series resistance 0.75Ω Max. (f = 470MHz)
• Large capacitance ratio 11.7 Typ. (C2/C25)
18.0 Typ. (C1/C28)
• 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
°C
°C
• Operating temperature Topr
–20 to +75
–65 to +150
• Storage temperature
Electrical Characteristics
Item
Tstg
(Ta = 25°C)
Symbol
Conditions
Min.
Typ.
11.7
Max.
Unit
nA
pF
Reverse current
IR
C2
VR = 28V
10
VR = 2V, f = 1MHz
VR = 25V, f = 1MHz
29.46
2.49
11.0
1.03
35.46
2.89
Diode capacitance
C25
pF
C2/C25
C25/C28
rs
Capacitance ratio
Series resistance
CD = 14pF, f = 470MHz
VR = 2 to 25V, f = 1MHz
0.75
2
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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E97522-PS
