BB179LX UHF variable capacitance diode
1.
Product profile
1.1 General description
The BB179LX is a planar technology variable capacitance diode in a SOD882T ultra small
leadless plastic SMD package. The excellent matching performance is achieved by gliding
matching and a Direct Matching Assembly (DMA) procedure.
1.2 Features
I
Excellent linearity
I
Excellent matching to 2 % DMA
I
Ultra small leadless SMD package
I
C
d(28V)
: 2.1 pF; C
d(1V)
to C
d(28V)
ratio typical 9
I
Low series resistance
1.3 Applications
I
Voltage Controlled Oscillators (VCO)
I
Electronic tuning in VHF television tuners
2.
Pinning information
[1]
The marking bar indicates the cathode.
3.
Ordering information
BB179LX
UHF variable capacitance diode
Rev. 01 -- 13 April 2006
Preliminary data sheet
Table 1.
Discrete pinning
Pin
Description
Simplified outline
Symbol
1
cathode
[1]
2
anode
Transparent
top view
2
1
sym008
Table 2.
Ordering information
Type number Package
Name
Description
Version
BB179LX
-
leadless ultra small plastic package; 2 terminals;
body 1.0
0.6
0.4 mm
SOD882T
BB179LX_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary data sheet
Rev. 01 -- 13 April 2006
2 of 7
Philips Semiconductors
BB179LX
UHF variable capacitance diode
4.
Marking
5.
Limiting values
6.
Characteristics
Table 3.
Marking
Type number
Marking code
BB179LX
L4
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
Min
Max
Unit
V
R
reverse voltage
-
30
V
I
F
forward current
-
20
mA
T
stg
storage temperature
-
55
+150
C
T
j
junction temperature
-
55
+125
C
Table 5.
Characteristics
T
j
= 25
C unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
I
R
reverse current
see
Figure 3
V
R
= 30 V
-
-
10
nA
V
R
= 30 V; T
j
= 85
C
-
-
200
nA
r
s
diode series resistance
f = 470 MHz; C
d
= 30 pF; see
Figure 2
-
0.65
-
C
d
diode capacitance
see
Figure 1
and
Figure 4
; f = 1 MHz;
V
R
= 1 V
18.2
-
21.3
pF
V
R
= 28 V
1.95
2.1
2.22
pF
diode capacitance ratio
f = 1 MHz
-
1.27
-
diode capacitance ratio
f = 1 MHz
8.45
9
10.9
diode capacitance ratio
f = 1 MHz
-
1.05
-
diode capacitance
matching
V
R
= 1 V to 28 V; in sequence of 5
diodes (gliding)
-
-
2
%
C
d 1V
(
)
C
d 2V
(
)
----------------
C
d 1V
(
)
C
d 28V
(
)
-------------------
C
d 25V
(
)
C
d 28V
(
)
-------------------
C
d
C
d
----------
BB179LX_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary data sheet
Rev. 01 -- 13 April 2006
3 of 7
Philips Semiconductors
BB179LX
UHF variable capacitance diode
f = 1 MHz; T
j
= 25
C.
f = 470 MHz; T
j
= 25
C.
Fig 1.
Diode capacitance as a function of reverse
voltage; typical values
Fig 2.
Diode serial resistance as a function of reverse
voltage; typical values
001aae543
10
20
30
C
d
(pF)
0
V
R
(V)
10
-
1
10
2
10
1
001aae544
0.4
0.2
0.6
0.8
r
s
(
)
0
V
R
(V)
10
-
1
10
2
10
1
T
j
= 25
C to 85
C.
Fig 3.
Reverse current as function of junction
temperature; maximum values
Fig 4.
Temperature coefficient of diode capacitance
as a function of reverse voltage; typical values
001aae541
10
2
10
10
3
I
R
(nA)
1
T
j
(
C)
0
100
80
40
60
20
V
R
(V)
10
-
1
10
2
10
1
001aae542
10
-
3
10
-
4
10
-
2
TC
Cd
(K
-
1
)
10
-
5
BB179LX_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary data sheet
Rev. 01 -- 13 April 2006
4 of 7
Philips Semiconductors
BB179LX
UHF variable capacitance diode
7.
Package outline
Fig 5.
Package outline SOD882T
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION
ISSUE DATE
IEC
JEDEC
JEITA
SOD882T
SOD882T
04-12-14
06-04-12
Note
1. The marking bar indicates the cathode
UNIT
A
mm
0.40
0.36
0.55
0.45
0.65
0.55
1.05
0.95
0.30
0.22
A
1
max
DIMENSIONS (mm are the original dimensions)
Leadless ultra small plastic package; 2 terminals; body 1 x 0.6 x 0.4 mm
A
B
y
e
1
w
B
M
L
1
(2
)
A
1
A
b (2
)
(2
)
(2
)
D
E
(1)
0
0.5
1 mm
scale
0.04
b
D
E
e
1
0.65
L
1
w
0.1
y
0.03
2
1
w
A
M
BB179LX_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary data sheet
Rev. 01 -- 13 April 2006
5 of 7
Philips Semiconductors
BB179LX
UHF variable capacitance diode
8.
Revision history
Table 6.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
BB179LX_1
20060413
Preliminary data sheet
-
-
Document Outline
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