LESHAN RADIO COMPANY, LTD.
BB1871/2
SOD523 SC-79
1
2
BB 187
2
ANODE
1
CATHODE
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
R
continuous reverse voltage
32
V
V
RM
peak reverse voltage
in series with a 10 k
resistor
35
V
I
F
continuous forward current
20
mA
T
stg
storage temperature
55
+150
C
T
j
operating junction temperature
55
+125
C
ELECTRICAL CHARACTERISTICS T
j
=25C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
TYP.
UNIT
I
R
reverse current
V
R
= 30 V; see Fig.2
10
nA
V
R
= 30 V; T
j
=85C; see Fig.2
200
nA
r
s
diode series resistance
f = 470 MHz; V
R
= 5V
0.75
C
d
diode capacitance
V
R
= 2 V; f = 1 MHz; see Figs 1and 3
29.3
34.2
pF
V
R
= 25 V; f = 1 MHz; see Figs 1and 3
2.57
2.92
pF
C
d(2V)
capacitance ratio
f = 1 MHz
11
C
d(25V)
C
d
capacitance matching
V
R
= 2 to 25 V; in a sequence of 15
2
%
C
d
diodes(gliding)
VHF variable capacitance diode
FEATURES
High linearity
Excellent matching to 2% DMA
Ultra small plastic SMD package
C25: 2.75 pF; ratio: 11
Low series resistance.
APPLICATIONS
Electronic tuning in VHF television tuners.
Voltage controlled oscillators (VCO).
DESCRIPTION
The BB187 is a planar technology variable capacitance diode, in a SOD523 (SC-79)
package. The excellent matching performance is achieved by gliding matching and a
direct matching assembly procedure.
MARKING CODE:X
X
1
2
LESHAN RADIO COMPANY, LTD.
BB1872/2
BB 187
50
40
30
20
10
0
10
1
1
10
10
2
V
R
( V )
C
d
( pF )
10
3
10
4
10
5
10
1
1
10
10
2
V
R
( V )
TC
d
( K
-1
)
10
3
10
2
10
0
50
100
T
j
( C )
I
R
(nA)
Fig.1 Diode capacitance as a function of reverse voltage; typical values.
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.
f = 1 MHz; T
j
=25C
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