1T405A
Variable Capacitance Diode
Description
M-290
The 1T405A is a variable capacitance diode
designed for electronic tuning of wide-band CATV
tuners using a super-small-miniature flat package
(SSVC).
High capacitance ratio (C25/C28) is improved to
support guard band.
Features
• Super-small-miniature flat package
• Low series resistance 0.85 Ω Max. (f=470 MHz)
Absolute Maximum Ratings (Ta=25 °C)
• Reverse voltage 34
• Operating temperature Topr –20 to +75 °C
• Storage temperature Tstg –65 to +150 °C
VR
V
• Large capacitance ratio 12.5 Typ.
(C2/C25)
1.03 Min.
(C25/C28)
• Small leakage current 10 nA Max. (VR=28 V)
• Capacitance deviation within 2 %
Applications
Electronic tuning of VHF band and wide-band
CATV tuners
Structure
Silicon epitaxial planar type diode
Electrical Characteristics
(Ta=25 °C)
Item
Symbol
IR
Conditions
VR=28 V
Min.
Typ.
12.5
Max.
10
Unit
nA
V
Reverse current
Reverse voltage
VR
IR=1 µA
34
C2
VR=2 V, f=1 MHz
VR=25 V, f=1 MHz
32.96
2.53
12.0
1.03
38.96
2.96
pF
pF
Diode capacitance
Capacitance ratio
C25
C2/C25
C25/C28
rs
Series resistance
Capacitance
CD=14 pF, f=470 MHz
VR=2 to 25 V, f=1 MHz
0.85
2
Ω
deviation in a
∆C
%
matching group
The continuous 20 pieces of ∆C are guaranteed.
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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E97109-TE
