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E97109-TE
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Variable Capacitance Diode
M-290
1T405A
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
Description
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)
• 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)
Unit
nA
V
pF
pF
Ω
%
Max.
10
38.96
2.96
0.85
2
Typ.
12.5
Min.
34
32.96
2.53
12.0
1.03
Item
Reverse current
Reverse voltage
Diode capacitance
Capacitance ratio
Series resistance
Capacitance
deviation in a
matching group
Symbol
IR
VR
C2
C25
C2/C25
C25/C28
rs
∆C
Conditions
VR=28 V
IR=1 µA
VR=2 V, f=1 MHz
VR=25 V, f=1 MHz
CD=14 pF, f=470 MHz
VR=2 to 25 V, f=1 MHz
The continuous 20 pieces of ∆C are guaranteed.