LESHAN RADIO COMPANY, LTD. VHF variable capacitance diode FEATURES · High linearity · Excellent matching to 2% DMA · Ultra small plastic SMD package · C25: 2.8 pF; ratio: 17 · Low series resistance. APPLICATIONS · Electronic tuning in VHF television tuners, band A up to 160 MHz · Voltage controlled oscillators (VCO). DESCRIPTION The BB182B is a planar technology variable capacitance diode, in a SOD523 (SC-79) package. The excellent matching performance is achieved by gliding matching and a direct matching assembly procedure. BB 182B 1 2 SOD523 SC-79 1 CATHODE 2 ANODE Y MARKING CODE:Y 1 2 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAMETER CONDITIONS VR continuous reverse voltage V RM IF peak reverse voltage continuous forward current T stg Tj storage temperature operating junction temperature MIN. MAX. UNIT – 34 V – – 35 20 V mA –55 –55 +150 +125 °C °C in series with a 10 kΩ resistor ELECTRICAL CHARACTERISTICS T j =25°C unless otherwise specified. SYMBOL IR PARAMETER reverse current CONDITIONS V R = 32 V; see Fig.2 MIN. – MAX. – TYP. 10 UNIT nA V R = 32 V; T j =85°C; see Fig.2 f = 470 MHz; V R = 5V – – – – 200 1.1 nA Ω V R = 2 V; f = 1 MHz; see Figs 1and 3 V R = 25 V; f = 1 MHz; see Figs 1and 3 47 2.65 – – 53 3 pF pF rs diode series resistance Cd diode capacitance C d(2V) C d(25V) capacitance ratio f = 1 MHz 17 – – capacitance matching V R = 2 to 25 V; in a sequence of 15 diodes(gliding) – – 2 ∆C d Cd % BB182B–1/2 LESHAN RADIO COMPANY, LTD. BB 182B 80 70 C d ( pF ) 60 50 40 30 f = 1 MHz; T j =25°C 20 10 0 10 –1 1 10 2 10 V R( V ) 10 3 10 –3 10 2 10 –4 TC d ( K -1 ) I R (nA) Fig.1 Diode capacitance as a function of reverse voltage; typical values. 10 0 50 T j ( °C ) Fig.2 Reverse current as a function of junction temperature; maximum values. 100 10 –5 10 –1 1 10 10 2 V R( V ) Fig.3 Temperature coefficient of diode capacitance as a function of reverse voltage; typical values. BB182B–2/2