LRC BB134 Datasheet
UHF Variable Capacitance
LESHAN RADIO COMPANY, LTD.
Diode
FEATURES
· Excellent linearity
· Excellent matching to 0.5% DMA
· Very small plastic SMD package
· C28: 1.9 pF; ratio: 10.
· Low series resistance.
APPLICATIONS
· Electronic tuning in UHF television
tuners.
· VCO.
1
CA THODE
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER MIN. MAX. UNIT
V
R
I
F
T
stg
T
j
continuous reverse voltage – 30 V
continuous forward current – 20 mA
storage temperature –55 +150 °C
operating junction temperature –55 +125 °C
DESCRIPTION
The BB134 is a variable capacitance
diode fabricated in planar technology, and
encapsulated in the SOD323 very small
plastic SMD package.
The excellent matching performance is
achieved by a direct matching assembly
procedure. The unmatched type, BB135
has the same specification.
2
ANODE
BB134
1
2
SOD– 323
MARKING DIAGRAM
P4
ELECTRICAL CHARACTERISTICS
T
j = 25 °C unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
R reverse current VR = 30 V; see Fig.2 – 10 nA
I
V
R = 30 V; Tj = 85 °C; see Fig.2 – 200 nA
s diode series resistance f = 470 MHz; note – 0.75 Ω
r
C
d diode capacitance VR = 0.5 V; f = 1 MHz; see Figs 1 and 3 17.5 21 pF
R = 28 V;f = 1 MHz; see Figs 1 and 3 1.7 2.1 pF
V
d( 0.5V ) capacitance ratio f = 1 MHz 8.9 12
C
C
d (28V )
capacitance matching VR = 0.5 to 28 V; in a sequence of 4 diodes – 0.5 %
∆C
d (gliding)
d VR= 0.5 to 28 V; in a sequence of 15 diodes – 2 %
C
(gliding)
Note
R is the value at which Cd = 9 pF.
1. V
BB134–1/2
LESHAN RADIO COMPANY, LTD.
f = 1 MHz; Tj = 25 °C.
Fig.1 Diode capacitance as a function of reverse voltage; typical values.
BB134
Tj °C.
Fig.2 Reverse current as a function of junction
temperature; maximum values.
Tj = 0 to 85 °C.
(V).
V
R
Fig.3 Temperature coefficient of diode
capacitance as a function of
reverse voltage; typical values.
BB134–2/2
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