LESHAN RADIO COMPANY, LTD.

BB178–1/2

VHF variable capacitance diode

BB 178

2

ANODE

1

CATHODE

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

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

continuous reverse voltage

–

32

V

peak reverse voltage

in series with a 10 k

Ω resistor

–

35

V

continuous forward current

–

20

mA

storage temperature

–55

+150

°C

operating junction temperature

–55

+125

°C

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

TYP.

UNIT

reverse current

–

–

10

nA

–

–

200

nA

diode series resistance

f = 100 MHz;

–

0.65

0.8

Ω

diode capacitance

34.65

–

42.35

pF

2.361

–

2.754

pF

capacitance ratio

f = 1 MHz

–

1.3

–

capacitance ratio

f = 1 MHz

13.5

–

–

capacitance ratio

f = 1 MHz

–

1.08

–

∆C

d

capacitance matching

––

2

%

C

d

diodes(gliding)

FEATURES

· Excellent linearity

· Excellent matching to 2% DMA

· Ultra small plastic SMD package

· C 28: 2.6 pF; ratio: 15

· Very low series resistance.

APPLICATIONS

· Electronic tuning in VHF television

tuners, band B up to 460 MHz

· Voltage controlled oscillators(VCO).

DESCRIPTION

The BB178 is a planar technology variable

capacitance diode, in a SOD523 (SC-79)

package. The excellent matching perfor-

mance is achieved by gliding matching and

a direct matching assembly procedure.

MARKING CODE:8

1

2

SOD523 SC-79

1

2