BB178LX,315 NXP

BB178LX VHF variable capacitance diode Rev. 02 12 February 2009 Product data sheet 1. Product prole 1.1 General description The BB178LX is a planar technology variable capacitance diode in a SOD882T ultra small leadless plastic SMD package. The excellent matching performance is achieved by gliding matching and a Direct Matching Assembly (DMA) procedure. 1.2 Features n Excellent linearity n Excellent matching to 2 % DMA n Ultra small leadless SMD package n C : 2.6 pF C to C ratio typical 15 d(28V) d(1V) d(28V) n Low series resistance 1.3 Applications n Voltage Controlled Oscillators (VCO) n Electronic tuning in VHF television tuners, Band B up to 460 MHz 2. Pinning information Table 1. Pinning Pin Description Simplied outline Graphic symbol 1 1 cathode 2 anode 1 2 sym008 Transparent top view 1 The marking bar indicates the cathode. 3. Ordering information Table 2. Ordering information Type number Package Name Description Version BB178LX - leadless ultra small plastic package 2 terminals SOD882T body 1 0.6 0.4 mmBB178LX NXP Semiconductors VHF variable capacitance diode 4. Marking Table 3. Marking codes Type number Marking code BB178LX L3 5. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit V reverse voltage - 32 V R I forward current - 20 mA F T storage temperature - 55 +150 C stg T junction temperature - 55 +125 C j 6. Characteristics Table 5. Characteristics T = 25 C unless otherwise specied. j Symbol Parameter Conditions Min Typ Max Unit I reverse current see Figure 3 R V =30V - - 10 nA R V =30V T =85 C - - 200 nA R j r diode series resistance f = 100 MHz at C =30pF - 0.7 - s d see Figure 2 C diode capacitance f = 1 MHz see Figure 1 and d Figure 4 V = 1 V 34.65 - 42.35 pF R V = 28 V 2.36 2.6 2.75 pF R C /C diode capacitance ratio (1 V to 2 V) f = 1 MHz - 1.3 - d(1V) d(2V) C /C diode capacitance ratio (1 V to 28 V) f = 1 MHz 13.5 15 - d(1V) d(28V) C /C diode capacitance ratio (25 V to 28 V) f = 1 MHz - 1.08 - d(25V) d(28V) C /C diode capacitance matching V = 1 V to 28 V in sequence of--2 % d d R 5 diodes (gliding) BB178LX 2 NXP B.V. 2009. All rights reserved. Product data sheet Rev. 02 12 February 2009 2 of 7