1998 Sep 15

2

Philips Semiconductors

Product specification

UHF variable capacitance diode

BB149

FEATURES

• Excellent linearity

• Excellent matching to 1% DMA

• Very small plastic SMD package

• C28: 2.1 pF; ratio 9

• Low series resistance.

APPLICATIONS

• Electronic tuning in UHF television

tuners

• VCO.

DESCRIPTION

The BB149 is a variable capacitance

diode, fabricated in planar

technology, and encapsulated in the

SOD323 very small plastic SMD

package.

The excellent matching performance

is achieved by gliding matching and a

direct matching assembly procedure.

The unmatched type, BB159 has the

same specification.

LIMITING VALUES

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

SYMBOL

PARAMETER

MIN.

MAX.

UNIT

continuous reverse voltage

−

30

V

continuous forward current

−

20

mA

storage temperature

−55

+150

°C

operating junction temperature

−55

+125

°C

Fig.1 Simplified outline (SOD323) and symbol.

Marking code: P9.

Cathode side indicated by a bar.

handbook, 4 columns

ka

MAM130

ELECTRICAL CHARACTERISTICS

Note

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

reverse current

−

10

nA

−

200

nA

diode series resistance f = 470 MHz; note 1

−

0.75

Ω

diode capacitance

18

19.5

pF

1.9

2.25

pF

capacitance ratio

f = 1 MHz

8.2

10

capacitance ratio

f = 1 MHz

1.2

−

capacitance matching

1%

(gliding)

−

2%

C

d1V

()

C

d28V

()

--------------------

C

d19V

()

C

d28V

()

--------------------

C

d

∆

C

d

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