Sony 1T387 Datasheet

Variable Capacitance Diode

Description

The 1T387 is a variable capacitance diode
designed for electronic tuning of BS and CS tuners
using a super miniature package (SMVC).

Features

• Super miniature package

• Low series resistance: 1.5Ω Max. (f = 470MHz)

• Large capacitance ratio: 14.6 Typ. (C1/C25)

• Small leakage current: 10nA Max. (VR = 25V)

• Capacitance deviation in a matching group: within 6%

Applications

Electronic tuning of BS and CS tuners

Structure

Silicon epitaxial planar type diode

Absolute Maximum Ratings (Ta = 25°C)

• Reverse voltage VR 30 V

• Peak reverse voltage VRM 35 V

(RL ≥ 10kΩ)

• Operating temperature Topr –20 to +75 °C

• Storage temperature Tstg –65 to +150 °C

– 1 –

E00421-PS

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.

1T387

M-235

Electrical Characteristics (Ta = 25°C)

Reverse voltage
Reverse current

Diode capacitance

Capacitance ratio
Series resistance
Capacitance deviation in a matching group

VR
IR
C1
C25
C1/C25
rs
∆C

IR = 1µA
VR = 25V
VR = 1V, f = 1MHz
VR = 25V, f = 1MHz

VR = 5V, f = 470MHz
VR = 1 to 25V, f = 1MHz

30.0

7.84

0.54

12.2 14.6

1.30

10.0

9.44

0.64

1.50

6.0

V
nA
pF
pF

Ω

%

UnitMax.Typ.Min.ConditionsSymbolItem

– 2 –

1T387

IF = 1mA

1 10

0.1

1

10

Diode capacitance vs. Reverse voltage

VR – Reverse voltage [V]

C – Diode capacitance [pF]

Ta – Ambient temperature [°C]

Forward voltage vs. Ambient temperature

V

F

– Forward voltage [V]

–20 0 20 40 60

10

100

1000

Reverse current vs. Ambient temperature

Ta – Ambient temperature [°C]

I

R

– Reverse current [pA]

80

0.90

0. 80

0.70

0.60
–20 0 20 40 60 80

IR = 10µA

Ta – Ambient temperature [°C]

Reverse voltage vs. Ambient temperature

V

R

– Reverse voltage [V]

45

40

35

30

–20 0 20 40 60 80

VR = 25V

5

2

0.2

0.5

2

5

20

50