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