1996 Sep 20
2
Philips Semiconductors
Product specification
UHF variable capacitance diode
BB146
FEATURES
Ultra high ratio
Excellent matching to 1.6% DMA
(Direct Matching Assembly)
Very small plastic SMD package
C28: 1.9 pF; ratio 20.
APPLICATIONS
Electronic tuning in television
tuners with extended UHF range
Voltage controlled oscillators
(VCO).
DESCRIPTION
The BB146 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.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
MIN.
MAX.
UNIT
V
R
continuous reverse voltage
-
30
V
I
F
continuous forward current
-
20
mA
T
stg
storage temperature
-
55
+150
C
T
j
operating junction temperature
-
55
+125
C
Fig.1 Simplified outline (SOD323) and symbol.
Marking code: P6.
Cathode side indicated by a bar.
handbook, 4 columns
k
a
MAM130
ELECTRICAL CHARACTERISTICS
T
j
= 25
C; unless otherwise specified.
Note
1. V
R
is the value at which C
d
= 9 pF.
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
I
R
reverse current
V
R
= 30 V; see Fig.3
-
10
nA
V
R
= 30 V; T
j
= 85
C; see Fig.3
-
200
nA
r
s
diode series resistance
f = 470 MHz; note 1
-
1.4
C
d
diode capacitance
V
R
= 0.5 V; f = 1 MHz; see Figs 2 and 4
35
43
pF
V
R
= 28 V; f = 1 MHz; see Figs 2 and 4
1.7
2.1
pF
capacitance ratio
f = 1 MHz
17.5
23
capacitance matching
V
R
= 0.5 to 28 V; in a sequence of 8 diodes
(gliding)
-
1.6
%
C
d 0.5V
(
)
C
d 28V
(
)
----------------------
C
d
C
d
----------
1996 Sep 20
3
Philips Semiconductors
Product specification
UHF variable capacitance diode
BB146
GRAPHICAL DATA
Fig.2 Diode capacitance as a function of reverse voltage; typical values.
f = 1 MHz; T
j
= 25
C
.
handbook, full pagewidth
0
50
MBH584
10
1
10
20
30
40
10
-
1
10
2
VR (V)
Cd
(pF)
Fig.3
Reverse current as a function of junction
temperature; maximum values.
handbook, halfpage
100
0
10
MLC816
10
2
10
3
50
IR
(nA)
T ( C)
j
o
T
j
= 0 to 85
C.
Fig.4
Temperature coefficient of diode
capacitance as a function of reverse
voltage; typical values.
handbook, halfpage
MLC815
1
10
10
2
10
3
10
4
10
5
10
1
(K
-
1
)
V (V)
R
d
TC
1996 Sep 20
4
Philips Semiconductors
Product specification
UHF variable capacitance diode
BB146
PACKAGE OUTLINE
DEFINITIONS
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.
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
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.
Dimensions in mm.
The marking bar indicates the cathode.
Fig.5 SOD323.
handbook, full pagewidth
1.8
1.6
2.7
2.3
0.40
0.25
1.35
1.15
1.00
max
0.25
0.10
MBC672 - 1
0.05
max
0.55
0.40
,
,
A
0.2
A
M
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