Sony 1T405 Datasheet

Variable Capacitance Diode

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Description

The 1T405 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: 0.85 Ω Max. (f=470 MHz)

• Large capacitance ratio: 12.5 Typ. (C2/C25)

• Small leakage current: 10 nA Max. (VR=28 V)

• Capacitance deviation in a matching group:

within 2%

Applications

Electronic tuning of UHF and wide-band CATV

tuners

1T405

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
Reverse voltage

Diode capacitance
Capacitance ratio

Series resistance
Capacitance
deviation in a
matching group

Symbol

IR
VR
C2

C25

C2/C25

rs

∆C

Conditions

VR=28 V
IR=1 µA
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.

34

32.96

2.53

12.0

Typ.

12.5

Max.

10

38.96

2.96

0.85

2

Unit

nA

V
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.

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E95918-TE

1T405

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

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