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LESHAN RADIO COMPANY, LTD.
Low-voltage variable capacitance diode
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.
BB 143
1
2
SOD523 SC-79
MARKING CODE:L
L
MAX. 6 8 20 +150 +150 UNIT V V mA C C MAX. 10 200 - 5.75 2.55 UNIT nA nA pF pF - - -
1 CATHODE
2 ANODE
1
2
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VR V RM IF T stg Tj PARAMETER continuous reverse voltage peak reverse voltage continuous forward current storage temperature operating junction temperature in series with a 10 k resistor CONDITIONS MIN. - - - -55 -55
ELECTRICAL CHARACTERISTICS T j =25C unless otherwise specified. SYMBOL IR rs Cd PARAMETER reverse current diode series resistance diode capacitance CONDITIONS V R = 6 V; see Fig.2 V R =6 V; T j =85C; see Fig.2 f = 470 MHz; V R =1 V V R = 1 V; f = 1 MHz; see Figs 1 and 3 V R = 4 V; f = 1 MHz; see Figs 1 and 3 C d ( 1V) C d ( 4V) capacitance ratio f = 1 MHz 2.1 2.35 MIN. - - - 4.75 2.05 TYP.
0.5 5.3 2.25
BB143-1/2
LESHAN RADIO COMPANY, LTD.
BB 143
10
8
C d ( pF )
6
4
2
0 10 -1 1 10
V R( V )
Fig.1 Diode capacitance as a function of reverse voltage; typical values.
10 3
10 -3
I R (nA)
10 2
10 0 50 100 10 -4 10 -1 1 10
T j ( C )
TC d ( K -1 )
V R( V )
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.
BB143-2/2

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