1T397
Variable Capacitance Diode
Description
M-235
The 1T397 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
• Large capacitance ratio C2/C25=14.5 Min.
C1/C28=21.5 Min.
C25/C28=1.03 Min.
Absolute Maximum Ratings (Ta=25 °C)
• Small series resistance rs=1.1 Ω
Max.
• Reverse voltage
VR
34
V
• High reverse voltage
VR=34 V
• Operating temperature
Topr
–20 to +75
°C
Structure
• Storage temperature
Silicon epitaxial planar-type diode
Tstg –65 to +150 °C
Electrical Characteristics
(Ta=25 °C)
Item
Reverse current
Reverse voltage
Symbol
Conditions
Min.
Typ.
15.5
Max.
10
Unit
nA
V
IR
VR
VR=28 V
IR=1 µA
34
C2
VR=2 V, f=1 MHz
VR=25 V, f=1 MHz
42.9
2.60
14.5
21.5
1.03
51.0
3.03
pF
pF
Diode capacitance
C25
C2/C25
C1/C28
C25/C28
rs
Capacitance ratio
Series resistance
CD=14 pF, f=470 MHz
VR=1 to 28 V
1.1
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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E94610B83-TE
