LESHAN RADIO COMPANY, LTD.
BB134–1/2
UHF Variable Capacitance
Diode
SOD– 323
1
2
BB134
P4
MARKING DIAGRAM
2
ANODE
1
CATHODE
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.
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.
LIMITING VA LUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER MIN. MAX. UNIT
VRcontinuous reverse voltage – 30 V
IFcontinuous forward current – 20 mA
Tstg storage temperature –55 +150 °C
Tjoperating junction temperature –55 +125 °C
ELECTRICAL CHARACTERISTICS
Tj = 25 °C unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
IRreverse current VR = 30 V; see Fig.2 – 10 nA
VR = 30 V; Tj = 85 °C; see Fig.2 – 200 nA
rs diode series resistance f = 470 MHz; note – 0.75 Ω
Cddiode capacitance VR = 0.5 V; f = 1 MHz; see Figs 1 and 3 17.5 21 pF
VR = 28 V;f = 1 MHz; see Figs 1 and 3 1.7 2.1 pF
Cd( 0.5V ) capacitance ratio f = 1 MHz 8.9 12
Cd (28V ) capacitance matching VR = 0.5 to 28 V; in a sequence of 4 diodes – 0.5 %
∆Cd(gliding)
CdVR= 0.5 to 28 V; in a sequence of 15 diodes – 2 %
(gliding)
Note
1. VR is the value at which C d = 9 pF.
LESHAN RADIO COMPANY, LTD.
BB134–2/2
BB134
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.
Tj °C. VR (V).
f = 1 MHz; Tj = 25 °C.
Tj = 0 to 85 °C.
