LESHAN RADIO COMPANY, LTD.
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.
1
CATHODE
2
ANODE
BB 187
1
2
SOD523 SC-79
MARKING CODE:X
X
MAX.
32
35
20
+150
+125
UNIT
V
V
mA
°C
°C
MAX.
–
–
–
–
–
–
–
TYP.
10
200
0.75
34.2
2.92
–
2
%
nA
nA
Ω
pF
pF
1
2
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
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
CONDITIONS
in series with a 10 kΩ resistor
MIN.
–
–
–
–55
–55
ELECTRICAL 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
CONDITIONS
V
R
= 30 V; see Fig.2
V
R
= 30 V; T
j
=85°C; see Fig.2
f = 470 MHz; V
R
= 5V
V
R
= 2 V; f = 1 MHz; see Figs 1and 3
V
R
= 25 V; f = 1 MHz; see Figs 1and 3
capacitance ratio
capacitance matching
f = 1 MHz
V
R
= 2 to 25 V; in a sequence of 15
diodes(gliding)
MIN.
–
–
–
29.3
2.57
11
–
UNIT
BB187–1/2
LRC [ LESHAN RADIO COMPANY ]
