LRC BB145B Datasheet

LESHAN RADIO COMPANY, LTD.

Low-voltage variable capacitance diode

FEATURES

· Ultra small plastic SMD package

· C4: 2.75 pF; ratio: 2.4

· Low series resistance.

APPLICATIONS

· Voltage controlled oscillators (VCO).

DESCRIPTION

The BB145B is a planar technology variable capacitance diode in a SOD523 (SC-79)
package.

1
CATHODE

2
ANODE

BB 145B

2

SOD523 SC-79

MARKING CODE:Z

1

LIMITING V ALUES In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

V

R

V

RM

I

F

T

stg

T

j

ELECTRICAL CHARACTERISTICS T

continuous reverse voltage – 6 V

peak reverse voltage in series with a 10 kΩ resistor – 8 V

continuous forward current – 20 mA

storage temperature –55 +150 °C

operating junction temperature –55 +150 °C

=25°C unless otherwise specified.

j

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

I

r
C

R

s

d

reverse current V R = 6 V; see Fig.2 – 10 nA

V

=6 V; T j =85°C; see Fig.2 – 200 nA

R

diode series resistance f = 470 MHz; V R =1 V – 0.6 Ω

diode capacitance V R = 1 V; f = 1 MHz; 6.4 7.2 pF

see Figs 1 and 3
V R = 4 V; f = 1 MHz; 2.55 2.95 pF

see Figs 1 and 3
C
C

d ( 1V)

d ( 4V)

capacitance ratio f = 1 MHz 2.2 –

Z

1

2

BB145B–1/2

LESHAN RADIO COMPANY, LTD.

10

8

6

( pF )
C d

4

2

f = 1 MHz; T j =25°C

0

–1

10

Fig.1 Diode capacitance as a function of reverse voltage; typical values.

110

V R ( V )

BB 145B

3

10

(nA)

R

2

I

10

10

0 50 100

T j ( °C )

Fig.2 Reverse current as a function of junction

temperature; maximum values.

-3

10

)

-1

( K

d

TC

-4

10

–1

10

110

V R ( V )

Fig.3 Temperature coefficient of diode capacitance as a function of

reverse voltage; typical values.

BB145B–2/2