LESHAN RADIO COMPANY, LTD.
BB145B1/2
Low-voltage variable capacitance diode
SOD523 SC-79
1
2
BB 145B
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
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
=25C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
I
R
reverse current
V
R
= 6 V; see Fig.2
10
nA
V
R
=6 V; T
j
=85C; see Fig.2
200
nA
r
s
diode series resistance
f = 470 MHz; V
R
=1 V
0.6
C
d
diode capacitance
V
R
= 1 V; f = 1 MHz;
6.4
7.2
pF
see Figs 1 and 3
V
R
= 4 V; f = 1 MHz;
2.55
2.95
pF
see Figs 1 and 3
C
d ( 1V)
C
d ( 4V)
capacitance ratio
f = 1 MHz
2.2
FEATURES
Ultra small plastic SMD package
C4: 2.75 pF; ratio: 2.4
Low series resistance.
APPLICATIONS
Voltage controlled oscillators (VCO).
DESCRIPTION
The BB145B is a planar technology variable capacitance diode in a SOD523 (SC-79)
package.
MARKING CODE:Z
Z
1
2
LESHAN RADIO COMPANY, LTD.
BB145B2/2
BB 145B
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.
f = 1 MHz; T
j
=25C
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