1T408
Variable Capacitance Diode
Description
The 1T408 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
•
Small series resistance 0.75Ω Max. (f = 470MHz)
•
Large capacitance ratio 11.7 Typ. (C
2
/C
25
)
18.0 Typ. (C
1
/C
28
)
•
Small leakage current
10nA Max. (V
R
= 28V)
•
Capacitance deviation in a matching group: within 2%
Applications
Electronic tuning of wide-band CATV tuners
Structure
Silicon epitaxial planar-type diode
Absolute Maximum Ratings
(Ta = 25°C)
•
Reverse voltage
V
R
34
•
Operating temperature Topr
–20 to +75
•
Storage temperature
Tstg
–65 to +150
Electrical Characteristics
Item
Reverse current
Diode capacitance
I
R
C
2
C
25
Capacitance ratio
Series resistance
Capacitance deviation
in a matching group
C
2
/C
25
C
25
/C
28
rs
∆C
C
D
= 14pF, f = 470MHz
V
R
= 2 to 25V, f = 1MHz
Symbol
V
R
= 28V
V
R
= 2V, f = 1MHz
V
R
= 25V, f = 1MHz
29.46
2.49
11.0
1.03
0.75
2
Ω
%
11.7
Conditions
Min.
Typ.
M-290
V
°C
°C
(Ta = 25°C)
Max.
10
35.46
2.89
Unit
nA
pF
pF
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–
E97522-PS