--1--
E94610B83-TE
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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.
Absolute Maximum Ratings (Ta=25 C)
Reverse voltage
V
R
34
V
Operating temperature
Topr
20 to +75
C
Storage temperature
Tstg
65 to +150
C
Description
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
C
2
/C
25
=14.5 Min.
C
1
/C
28
=21.5 Min.
C
25
/C
28
=1.03 Min.
Small series resistance
rs=1.1
Max.
High reverse voltage
V
R
=34 V
Structure
Silicon epitaxial planar-type diode
Variable Capacitance Diode
M-235
1T397
Electrical Characteristics
(Ta=25 C)
Item
Reverse current
Reverse voltage
Diode capacitance
Capacitance ratio
Series resistance
Capacitance deviation in a
matching group
Symbol
I
R
V
R
C
2
C
25
C
2
/C
25
C
1
/C
28
C
25
/C
28
rs
C
Conditions
V
R
=28 V
I
R
=1 A
V
R
=2 V, f=1 MHz
V
R
=25 V, f=1 MHz
C
D
=14 pF, f=470 MHz
V
R
=1 to 28 V
Min.
Typ.
Max.
Unit
10
nA
34
V
42.9
51.0
pF
2.60
3.03
pF
14.5
15.5
21.5
1.03
1.1
2.0
%
--2--
1T397
Diode capacitance vs. Reverse voltage temperature
Ta=25C
100
10
1
C
-
D
i
o
d
e
c
a
p
a
c
i
t
a
n
c
e
(
p
F
)
V
R
- Reverse voltage temperature
1
10
50
V
F
F
o
r
w
a
r
d
v
o
l
t
a
g
e
(
V
)
0.90
0.80
0.70
0.60
20
0
20
40
60
80
I
F
=1mA
2
5
20
2
5
20
50
V
R
-
R
e
v
e
r
s
e
v
o
l
t
a
g
e
(
V
)
50
45
40
35
30
-20
0
20
40
60
I
R
=10A
Reverse current vs. Ambient temperature
Ta - Ambient temperature (C)
I
R
R
e
v
e
r
s
e
c
u
r
r
e
n
t
(
n
A
)
V
R
=28V
1.000
0.100
0.010
0.001
20
0
20
40
60
Ta - Ambient temperature (C)
Reverse voltage vs. Ambient temperature
Ta - Ambient temperature (C)
Forward voltage vs. Ambient temperature
80
80
--3--
1T397
Diode capacitance vs. Ambient temperature
D
i
o
d
e
c
a
p
a
c
i
t
a
n
c
e
C
(
T
a
)
C
(
2
5
C
)
20
0
20
40
60
80
1.03
1.02
1.01
1.00
0.99
0.98
V
R
=1V
V
R
=2V
V
R
=7V
V
R
=15V
V
R
=25V
Reverse current vs. Reverse voltage
I
R
-
R
e
v
e
r
s
e
c
u
r
r
e
n
t
(
n
A
)
0.100
0.010
0.001
0.0001
1
10
50
Ta=60C
Ta=25C
2
5
20
Ta=80C
Thermal coeffcient of diode capacitance vs. Reverse voltage
VR - Reverse voltage (V)
T
h
e
r
m
a
l
c
o
e
f
f
c
i
e
n
t
o
f
d
i
o
d
e
c
a
p
a
c
i
t
a
n
c
e
(
p
p
m
/
C
)
1000
100
50
1
10
2
5
20
200
500
Ta - Ambient temperature (C)
V
R
- Reverse voltage(V)
50
SONY CODE
EIAJ CODE
JEDEC CODE
PACKAGE WEIGHT
M-235
1.25
+ 0.2
0.1
0.3
+ 0.1
0.05
1
.
7
0
.
1
2
.
5
0
.
2
1
2
0.3
+ 0.1
0.05
0.9 0.1
0.2
0 0.05
0 to 10
0.11
+ 0.1
0.06
M-235
0.1g
NOTE: Dimension "
" does not include mold protrusion.
Package Outline Unit : mm
1T397
--4--
Marking
1
2
CATHODE MARK
97
B
Notes
1) B:Lot No.(Year and Month of manufacture)
Year;Last one digit
Month;A,B,C(for Oct. to Dec.)
1 to 9(for Jan.to Sept.)
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