DISCRETE SEMICONDUCTORS
DATA SHEET
alfpage
M3D049
BB149A
UHF variable capacitance diode
Product specification
1997 Dec 17
Philips Semiconductors
Product specification
UHF variable capacitance diode
FEATURES
•
Excellent linearity
•
Excellent matching to 2% DMA
•
Very small plastic SMD package
•
C28: 2.1 pF; ratio 9
•
Low series resistance.
APPLICATIONS
•
Electronic tuning in UHF television
tuners
•
Voltage controlled oscillators
(VCO).
PINNING
PIN
1
2
DESCRIPTION
cathode
anode
DESCRIPTION
The BB149A is a planar technology
variable capacitance diode, in a
SOD323 very small plastic SMD
package. The excellent matching
performance is achieved by gliding
matching and a direct matching
assembly procedure.
BB149A
handbook, 2 columns
1
2
MAM392
Marking code:
PL.
Cathode side indicated by a bar.
Fig.1 Simplified outline
(SOD323) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
V
R
V
Rp
I
F
T
stg
T
j
PARAMETER
continuous reverse voltage
peak reverse voltage
continuous forward current
storage temperature
operating junction temperature
in series with a 10 kΩ resistor
CONDITIONS
−
−
−
−55
−55
MIN.
MAX.
30
35
20
+150
+125
V
V
mA
°C
°C
UNIT
ELECTRICAL CHARACTERISTICS
T
j
= 25
°C
unless otherwise specified.
SYMBOL
I
R
r
s
C
d
PARAMETER
reverse current
diode series resistance
diode capacitance
capacitance ratio
CONDITIONS
V
R
= 30 V; see Fig.3
V
R
= 30 V; T
j
= 85
°C;
see Fig.3
V
R
= 1 V; f = 1 MHz; see Figs 2 and 4
V
R
= 28 V; f = 1 MHz; see Figs 2 and 4
C
d
(
1V
)
-----------------
-
C
d
(
2V
)
C
d
(
1V
)
--------------------
C
d
(
28V
)
C
d
(
25V
)
--------------------
C
d
(
28V
)
∆
C
d
---------
-
C
d
f = 1 MHz
MIN.
−
−
TYP.
−
−
0.6
MAX.
10
200
0.75
UNIT
nA
nA
Ω
f = 470 MHz; V
R
is the value at which C
d
= 9 pF
−
18.22
−
1.951
−
−
1.27
21.26 pF
2.225 pF
−
capacitance ratio
f = 1 MHz
8.45
−
10.9
capacitance ratio
f = 1 MHz
−
1.05
−
capacitance matching
V
R
= 1 to 28 V; in a sequence of 15 diodes
(gliding)
−
−
2
%
1997 Dec 17
2
Philips Semiconductors
Product specification
UHF variable capacitance diode
GRAPHICAL DATA
30
BB149A
MLC391
handbook, full pagewidth
Cd
(pF)
20
10
0
10
1
f = 1 MHz; T
j
= 25
°C
.
1
10
V R (V)
10
2
Fig.2 Diode capacitance as a function of reverse voltage; typical values.
10
3
handbook, halfpage
MLC816
10
3
handbook, halfpage
MLC815
IR
(nA)
(K
−1
)
TC d
10
2
10
4
10
0
50
T j (
o
C)
100
10
5
10
1
1
10
VR (V)
10
2
T
j
= 0 to 85
°C.
Fig.4
Fig.3
Reverse current as a function of junction
temperature; maximum values.
Temperature coefficient of diode
capacitance as a function of
reverse voltage; typical values.
1997 Dec 17
3
Philips Semiconductors
Product specification
UHF variable capacitance diode
PACKAGE OUTLINE
Plastic surface mounted package; 2 leads
BB149A
SOD323
A
A1
E
bp
DIMENSIONS (mm are the original dimensions)
UNIT
mm
A
1.1
0.8
A1
max.
+
0.05
−
0.05
bp
0.40
0.25
c
D
0.25
0.10
Note
1. The marking bar indicates the cathode.
OUTLINE
VERSION
SOD323
,
Lp
HE
D
1
2
(1)
Q
c
v
M
A
A
0
1
2 mm
scale
E
HE
Lp
Q
v
0.2
1.8
1.6
1.35
1.15
2.7
2.3
0.45
0.15
0.25
0.15
REFERENCES
IEC
JEDEC
EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
98-09-14
1997 Dec 17
4
Philips Semiconductors
Product specification
UHF variable capacitance diode
DEFINITIONS
Data sheet status
Objective specification
Preliminary specification
Product specification
Limiting values
BB149A
This data sheet contains target or goal specifications for product development.
This data sheet contains preliminary data; supplementary data may be published later.
This data sheet contains final product specifications.
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1997 Dec 17
5
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