LESHAN RADIO COMPANY, LTD.
BB1431/2
Low-voltage variable capacitance diode
SOD523 SC-79
1
2
BB 143
2
ANODE
1
CATHODE
FEATURES
· Excellent linearity
· Ultra small plastic SMD package
· C4: 2.25 pF; ratio: 2.35
· Low series resistance.
APPLICATIONS
· Voltage controlled oscillators (VCO).
DESCRIPTION
The BB143 is a variable capacitance diode, fabricated in planar technology, and
encapsulated in the SOD523 (SC-79) ultra small plastic SMD package.
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V
R
continuous reverse voltage
6
V
V
RM
peak reverse voltage
in series with a 10 k
resistor
8
V
I
F
continuous forward current
20
mA
T
stg
storage temperature
55
+150
°C
T
j
operating junction temperature
55
+150
°C
ELECTRICAL CHARACTERISTICS T
j
=25°C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
I
R
reverse current
V
R
= 6 V; see Fig.2
10
nA
V
R
=6 V; T
j
=85°C; see Fig.2
200
nA
r
s
diode series resistance
f = 470 MHz; V
R
=1 V
0.5
C
d
diode capacitance
V
R
= 1 V; f = 1 MHz;
4.75
5.3
5.75
pF
see Figs 1 and 3
V
R
= 4 V; f = 1 MHz;
2.05
2.25
2.55
pF
see Figs 1 and 3
C
d ( 1V)
C
d ( 4V)
capacitance ratio
f = 1 MHz
2.1
2.35
MARKING CODE:L
L
1
2
LESHAN RADIO COMPANY, LTD.
BB1432/2
BB 143
10
8
6
4
2
0
10
1
1
10
V
R
( V )
C d
( pF )
10
-3
10
-4
10
1
1
10
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.
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