Philips BB148 DATA SHEET
DISCRETE SEMICONDUCTORS
DATA SH EET
lfpage
M3D049
BB148
VHF variable capacitance diode
Product specification
Supersedes data of December 1994
File under Discrete Semiconductors, SC01
1996 May 03
Philips Semiconductors Product specification
VHF variable capacitance diode BB148
FEATURES
• Excellent linearity
• Excellent matching to 1% DMA
• Very small plastic SMD package
• C28: 2.6 pF; ratio: 15
• Low series resistance.
handbook, 4 columns
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APPLICATIONS
• Electronic tuning in VHF television
tuners, band B up to 460 MHz
• VCO.
DESCRIPTION
The BB148 is 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 diodes are delivered on tape in
several matched groups and are also
available unmatched upon request.
The unmatched type, BB158 has the
same specification.
ELECTRICAL CHARACTERISTICS
T
=25°C; unless otherwise specified.
j
MAM130
Marking code: P8.
Cathode side indicated by a yellow bar.
Fig.1 Simplified outline (SOD323) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER MIN. MAX. UNIT
V
R
I
F
T
stg
T
j
continuous reverse voltage
continuous forward current −
storage temperature
operating junction temperature
−
−55
−55
30 V
20 mA
+150 °C
+125 °C
SYMBO
L
I
R
r
s
C
d
C
d1V()
-------------------C
d28V()
C
∆
d
---------C
d
PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
reverse current VR= 30 V; see Fig.3 −−
= 30 V; Tj=85°C; see Fig.3 −−
V
R
diode series resistance f = 100 MHz; note 1 −−0.9 Ω
diode capacitance VR= 1 V; f = 1 MHz; see Figs 2 and 4
= 28 V; f = 1 MHz; see Figs 2 and 4 2.4 − 2.75 pF
V
R
capacitance ratio f = 1 MHz 14.5 −−
capacitance matching V
= 0.5 to 28 V; in a sequence of 4 diodes (gliding) −−1%
R
= 0.5 to 28 V; in a sequence of 20 diodes (gliding) −−2%
V
R
Note
1. V
is the value at which Cd= 12 pF.
R
1996 May 03 2
36.8
−
10
200
nA
nA
41.8 pF
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