Sony 1T404 Datasheet
Variable Capacitance Diode
Description
The 1T404 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
• Low series resistance: 0.75 Ω Max. (f=470 MHz)
• Large capacitance ratio: 11.5 Typ. (C2/C25)
• Small leakage current: 10 nA Max. (VR=28 V)
• Capacitance deviation in a matching group:
within 2 %
Applications
Electronic tuning of wide-band CATV tuners
1T404
M-290
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
Structure
Silicon epitaxial planar type diode
Electrical Characteristics (Ta=25 °C)
Item
Reverse current
Diode capacitance
Capacitance ratio
Series resistance
Capacitance
deviation in a
matching group
Symbol
IR
C2
C25
C2/C25
rs
∆C
Conditions
VR=28 V
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
Min.
29.36
2.49
11.0
Typ.
11.5
Max.
10
34.26
2.89
0.75
2
Unit
nA
pF
pF
Ω
%
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.
—1—
E95917-TE
1T404
Diode capacitance vs. Reverse voltage
100
50
20
10
5
C-Diode capacitance (pF)
2
1
12 51020 50
R-Reverse voltage (V)
V
Ta=25°C
Reverse current vs. Ambient temperature
VR=28V
100
10
-Reverse current (pA)
R
I
1
–20 0 20 40 60 80
Ta-Ambient temperature (°C)
0.80
Forward voltage vs. Ambient temperature
0.70
0.60
-Forward voltage (V)
F
V
0.50
–20 0 20 40 60 80
Ta-Ambient temperature (°C)
IF=1mA
45
Reverse voltage vs. Ambient temperature
40
35
-Reverse voltage (V)
R
V
30
–20 0 20 40 60 80
Ta-Ambient temperature (°C)
IR=10µA
—2—
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