Philips Semiconductors
Product specification
VHF variable capacitance diode
FEATURES
•
High linearity
•
Excellent matching to 2% DMA
•
Ultra small plastic SMD package
•
C25: 2.75 pF; ratio: min. 11
•
Low series resistance.
APPLICATIONS
•
Electronic tuning in VHF television tuners
•
Voltage controlled oscillators (VCO).
handbook, 2 columns
1
BB187
PINNING
PIN
1
2
cathode
anode
DESCRIPTION
2
DESCRIPTION
The BB187 is a variable capacitance diode, fabricated in
planar technology and encapsulated in the SOD523
(SC-79) ultra small plastic SMD package. The excellent
matching performance is achieved by gliding matching
and a Direct Matching Assembly (DMA) procedure.
MARKING
TYPE NUMBER
BB187
MARKING CODE
X
X
MBL427
Orientation of marking code as shown.
The marking bar indicates the cathode.
Fig.1 Simplified outline (SOD523) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOL
V
R
V
RM
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.
32
35
20
+150
+150
V
V
mA
°C
°C
UNIT
2002 Feb 20
2
Philips Semiconductors
Product specification
VHF variable capacitance diode
CHARACTERISTICS
T
j
= 25
°C
unless otherwise specified.
SYMBOL
I
R
r
s
C
d
C
d
(
2V
)
------------------
-
C
d
(
25V
)
∆
C
d
---------
-
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
f = 470 MHz; V
R
= 5 V
V
R
= 2 V; f = 1 MHz; see Figs 2 and 4
f = 1 MHz
MIN.
−
−
−
29.3
11
TYP.
−
−
−
−
−
−
−
BB187
MAX.
10
200
0.75
34.2
2.92
−
UNIT
nA
nA
Ω
pF
pF
V
R
= 25 V; f = 1 MHz; see Figs 2 and 4 2.57
capacitance matching
V
R
= 2 to 25 V; in a sequence of 15
diodes (gliding)
−
2
%
handbook, full pagewidth
50
MCD781
Cd
(pF)
40
30
20
10
0
10
−1
1
10
VR (V)
10
2
f = 1 MHz; T
j
= 25
°C
.
Fig.2 Diode capacitance as a function of reverse voltage; typical values.
2002 Feb 20
3
Philips Semiconductors
Product specification
VHF variable capacitance diode
BB187
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
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.
2002 Feb 20
4
Philips Semiconductors
Product specification
VHF variable capacitance diode
PACKAGE OUTLINE
Plastic surface mounted package; 2 leads
BB187
SOD523
A
c
HE
v
M
A
D
A
0
0.5
scale
1 mm
1
E
bp
2
DIMENSIONS (mm are the original dimensions)
UNIT
mm
A
0.7
0.5
bp
0.35
0.25
c
0.2
0.1
D
1.3
1.1
E
0.9
0.7
HE
1.7
1.5
v
0.15
(1)
Note
1. The marking bar indicates the cathode.
OUTLINE
VERSION
SOD523
REFERENCES
IEC
JEDEC
EIAJ
SC-79
EUROPEAN
PROJECTION
ISSUE DATE
98-11-25
2002 Feb 20
5
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