SONY 1T397

1T397
Variable Capacitance Diode
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 C2/C25=14.5 Min.
C1/C28=21.5 Min.
C25/C28=1.03 Min.
• Small series resistance rs=1.1 Ω
Max.
• High reverse voltage
VR=34 V
M-235
Absolute Maximum Ratings (Ta=25 °C)
• Reverse voltage
VR
34
• Operating temperature
Topr
–20 to +75
• Storage temperature
Tstg –65 to +150
Structure
Silicon epitaxial planar-type diode
Electrical Characteristics
Item
Reverse current
Reverse voltage
Diode capacitance
Capacitance ratio
Series resistance
Capacitance deviation in a
matching group
V
°C
°C
(Ta=25 °C)
Symbol
IR
VR
C2
C25
C2/C25
C1/C28
C25/C28
rs
∆C
Conditions
51.0
3.03
Unit
nA
V
pF
pF
CD=14 pF, f=470 MHz
1.1
Ω
VR=1 to 28 V
2.0
%
VR=28 V
IR=1 µA
VR=2 V, f=1 MHz
VR=25 V, f=1 MHz
Min.
34
42.9
2.60
14.5
21.5
1.03
Typ.
Max.
10
15.5
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—
E94610B83-TE
1T397
Diode capacitance vs. Reverse voltage temperature
Reverse current vs. Ambient temperature
100
1.000
VR=28V
Ta=25°C
20
10
IR Reverse current (nA)
C-Diode capacitance (pF)
50
5
2
0.100
0.010
1
1
2
10
5
50
20
VR - Reverse voltage temperature
0.001
–20
0
20
40
80
60
Ta - Ambient temperature (°C)
Forward voltage vs. Ambient temperature
Reverse voltage vs. Ambient temperature
50
IF=1mA
IR=10µA
0.80
0.70
0.60
–20
0
20
40
60
80
VR - Reverse voltage (V)
VF Forward voltage (V)
0.90
45
40
35
Ta - Ambient temperature (°C)
30
-20
0
20
40
60
Ta - Ambient temperature (°C)
—2—
80
1T397
Diode capacitance vs. Ambient temperature
1.03
VR=1V
C (Ta)
Diode capacitance
C (25°C)
1.02
VR=2V
VR=7V
VR=25V
VR=15V
1.01
1.00
0.99
0.98
–20
0
20
40
60
80
Ta - Ambient temperature (°C)
Thermal coeffcient of diode capacitance vs. Reverse voltage
Thermal coeffcient of diode capacitance (ppm/°C)
Reverse current vs. Reverse voltage
IR - Reverse current (nA)
0.100
0.010
Ta=80°C
Ta=60°C
0.001
Ta=25°C
0.0001
1
2
5
10
20
50
VR - Reverse voltage(V)
—3—
1000
500
200
100
50
1
2
5
10
20
VR - Reverse voltage (V)
50
1T397
Package Outline
Unit : mm
AA AA
M-235
+ 0.2
∗1.25 – 0.1
∗0.9 ± 0.1
+ 0.1
0.3 – 0.05
0.2
2.5 ± 0.2
∗1.7 ± 0.1
2
1
+ 0.1
0.3 – 0.05
0 ± 0.05
+ 0.1
0.11 – 0.06
0° to 10°
NOTE: Dimension “∗” does not include mold protrusion.
SONY CODE
M-235
EIAJ CODE
JEDEC CODE
Marking
PACKAGE WEIGHT
CATHODE MARK
0.1g
2
97
B
1
—4—
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.)