BB143

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 Ω 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 kΩ resistor CONDITIONS MIN. – – – –55 –55 ELECTRICAL CHARACTERISTICS T j =25°C 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 =85°C; 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