BB178,115 NXP

BB178 VHF variable capacitance diode Rev. 3 5 September 2011 Product data sheet 1. Product profile 1.1 General description The BB178 is a planar technology variable capacitance diode, in a SOD523 (SC-79) ultra small plastic package. The excellent matching performance is achieved by gliding matching and a Direct Matching Assembly (DMA) procedure. 1.2 Features and benefits Excellent linearity Excellent matching to 2 % DMA Ultra small plastic SMD package C : 2.6 pF C to C ratio: 15 d(28V) d(1V) d(28V) Very low series resistance. 1.3 Applications Electronic tuning in VHF television tuners, band B up to 460 MHz Voltage Controlled Oscillators (VCO). 2. Pinning information Table 1. Pinning 1 Pin Description Simplified outline Symbol 1 cathode 2 anode 1 2 sym008 1 The marking bar indicates the cathode. 3. Ordering information Table 2. Ordering information Type number Package Name Description Version BB178 SC-79 plastic surface mounted package 2 leads SOD523BB178 NXP Semiconductors VHF variable capacitance diode 4. Marking Table 3. Marking Type number Marking code BB178 8 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 V peak reverse voltage in series with a -35 V RM 10 k resistor 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 specified. j Symbol Parameter Conditions Min Typ Max Unit I reverse current see Figure 2 R V=30V --10 nA R V =30V T =85 C - - 200 nA R j 1 r diode series f = 100 MHz -0.65 0.8 s resistance C diode f = 1 MHz see Figure 1 d capacitance and Figure 3 V = 1 V 34.65 - 42.35 pF R V = 28 V 2.361 2.6 2.754 pF R capacitance ratio f = 1 MHz - 1.3 - C d1V ---------------- C d2V capacitance ratio f = 1 MHz 13.5 15 - C d1V ------------------ C d28V capacitance ratio f = 1 MHz - 1.08 - C d25V ------------------ C d28V capacitance V = 1 V to 28 V in a --2 % R C d ---------- matching sequence of 10 diodes C d (gliding) 1 V is the value at which C = 30 pF. R d BB178 All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 3 5 September 2011 2 of 8