BB148
VHF variable capacitance diode
Rev. 05 — 4 October 2004
Product data sheet
1. Product profile
1.1 General description
The BB148 is a variable capacitance diode, fabricated in planar technology, and
encapsulated in the SOD323 (SC-76) very small SMD plastic package.
The excellent matching performance is achieved by gliding matching and a Direct
Matching Assembly (DMA) 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.
1.2 Features
s
s
s
s
s
Excellent linearity
Excellent matching to 1 % DMA
Very small SMD plastic package
C
d(28V)
: 2.6 pF; C
d(1V)
to C
d(28V)
ratio: 15
Low series resistance.
1.3 Applications
s
Electronic tuning in VHF television tuners, band B up to 460 MHz
s
Voltage Controlled Oscillators (VCO).
2. Pinning information
Table 1:
Pin
1
2
Pinning
Description
cathode
anode
1
2
sym008
Simplified outline
[1]
Symbol
[1]
The marking bar indicates the cathode.
Philips Semiconductors
BB148
VHF variable capacitance diode
3. Ordering information
Table 2:
Ordering information
Package
Name
BB148
SC-76
Description
plastic surface mounted package; 2 leads
Version
SOD323
Type number
4. Marking
Table 3:
BB148
Marking
Marking code
P8
Type number
5. Limiting values
Table 4:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
V
R
I
F
T
stg
T
j
Parameter
reverse voltage
forward current
storage temperature
junction temperature
Conditions
Min
-
-
−55
−55
Max
30
20
+150
+125
Unit
V
mA
°C
°C
6. Characteristics
Table 5:
Characteristics
T
j
= 25
°
C unless otherwise specified.
Symbol
I
R
Parameter
reverse current
Conditions
see
Figure 2
V
R
= 30 V
V
R
= 30 V; T
j
= 85
°C
r
s
C
d
diode series
resistance
diode
capacitance
f = 100 MHz; C
d
= 12 pF
f = 1 MHz; see
Figure 1
and
3
V
R
= 1 V
V
R
= 28 V
f = 1 MHz
36.8
2.4
14.5
-
2.6
15
41.8
2.75
-
pF
pF
-
-
-
-
-
-
10
200
0.9
nA
nA
Ω
Min
Typ
Max
Unit
C
d
(
1V
)
------------------
-
C
d
(
28V
)
∆
C
d
---------
-
C
d
capacitance
ratio
capacitance
matching
V
R
= 0.5 V to 28 V; in a
sequence of 10 diodes
(gliding)
-
-
2
%
9397 750 13824
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 05 — 4 October 2004
2 of 7
Philips Semiconductors
BB148
VHF variable capacitance diode
50
C
d
(pF)
40
mlc266
30
20
10
0
10
−1
1
10
V
R
(V)
10
2
f = 1 MHz; T
j
= 25
°C.
Fig 1. Diode capacitance as a function of reverse voltage; typical values.
10
3
I
R
(nA)
10
2
10
−4
mlc816
10
−3
mlc815
TC
d
(K
−1
)
10
1
0
20
40
60
80
T
j
(°C)
100
10
−5
10
−1
1
10
V
R
(V)
10
2
T
j
= 0
°C
to 85
°C.
Fig 2. Reverse current as a function of junction
temperature; maximum values.
Fig 3. Temperature coefficient of diode capacitance
as a function of reverse voltage; typical values.
9397 750 13824
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 05 — 4 October 2004
3 of 7
Philips Semiconductors
BB148
VHF variable capacitance diode
7. Package outline
Plastic surface mounted package; 2 leads
SOD323
D
A
E
X
H
D
v
M
A
Q
1
2
b
p
A
A
1
(1)
c
L
p
detail X
0
1
scale
2 mm
DIMENSIONS (mm are the original dimensions)
UNIT
mm
A
1.1
0.8
A
1
max
0.05
b
p
0.40
0.25
c
0.25
0.10
D
1.8
1.6
E
1.35
1.15
H
D
2.7
2.3
L
p
0.45
0.15
Q
0.25
0.15
v
0.2
Note
1. The marking bar indicates the cathode
OUTLINE
VERSION
SOD323
REFERENCES
IEC
JEDEC
JEITA
SC-76
EUROPEAN
PROJECTION
ISSUE DATE
99-09-13
03-12-17
Fig 4. Package outline SOD323 (SC-76).
9397 750 13824
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 05 — 4 October 2004
4 of 7
Philips Semiconductors
BB148
VHF variable capacitance diode
8. Revision history
Table 6:
BB148_5
Modifications:
Revision history
Release date
20041004
Data sheet status
Product data sheet
Change notice
-
Doc. number
9397 750 13824
Supersedes
BB148_4
Document ID
•
•
•
•
•
The format of this data sheet has been redesigned to comply with the new presentation and
information standard of Philips Semiconductors
Table 5 “Characteristics”:
∆C
d
/C
d
conditions changed from sequence of 20 diodes to sequence
of 10 diodes
Table 5 “Characteristics”:
∆C
d
/C
d
in a sequence of 4 diodes removed
Table 5 “Characteristics”:
added typical value of 2.6 pF for C
d(28V)
Table 5 “Characteristics”:
added typical value of 15 for C
d(1V)
to C
d(28V)
ratio.
Product specification
Product specification
n.a.
n.a.
-
-
-
-
9397 750 12644
9397 750 04377
n.a.
n.a.
BB148_3
BB148_2
BB148_1
-
BB148_4
BB148_3
BB148_2
BB148_1
20040301
19980915
19960503
19941209
9397 750 13824
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 05 — 4 October 2004
5 of 7
