1T399
Variable Capacitance Diode
Description
M-235
The 1T399 is a variable capacitance diode
designed for the electronic tuning of wide-band
CATV tuners, and it has a super miniature package.
Features
• Super miniature package
• Small series resistance 0.75 Ω Max. (f=470 MHz)
• Large capacitance ratio 11.7
Typ. (C2/C25)
Typ. (C1/C28)
18.0
Absolute Maximum Ratings (Ta=25 °C)
• Small leak current
10 nA Max. (VR=28 V)
• Reverse voltage
• Operating temperature Topr
• Storage temperature
VR
34
V
• Capacitance deviation in a matching group:
–20 to +75
°C
within 2 %
Tstg –65 to +150 °C
Applications
Electronic tuning of wide-band CATV tuners
Structure
Silicon epitaxial planar-type diode
Electrical Characteristics
(Ta=25 °C)
Item
Symbol
IR
Conditions
Min.
Typ.
11.7
Max.
10
Unit
nA
pF
Reverse current
VR=28 V
C2
VR=2 V, f=1 MHz
VR=25 V, f=1 MHz
29.50
2.53
11.0
1.03
35.50
2.93
Diode capacitance
Capacitance ratio
C25
pF
C2/C25
C25/C28
rs
Series resistance
CD=14 pF, f=470 MHz
VR=2 to 25 V, f=1 MHz
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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E97454A82-TE
