UNISONIC TECHNOLOGIES CO., LTD BB178 Preliminary DIODE VHF VARIABLE CAPACITANCE DIODE DESCRIPTION The UTC BB178 is a planar technology variable capacitance diode providing the designers excellent matching performance, ultra-low series resistance and great linearity. The UTC BB178 is suitable for VCO (Voltage Controlled Oscillators) and Electronic tuning in VHF (Very High Frequency) tuners. 1 2 SOD-523 FEATURES * Excellent matching to 2% DMA * Ultra low series resistance. * Great linearity * C28: 2.6 pF; ratio: 15 ORDERING INFORMATION Ordering Number BB178G-CC2-R Note: Pin Assignment: A: Anode K: Cathode Package SOD-523 Pin Assignment 1 2 A K Packing Tape Reel BB178G-CC2-R (1) Packing Type (1) R: Tape Reel (2) Package Type (2) CC2 : SOD-523 (3) Green Package (3) G: Halogen Free and Lead Free MARKING www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 3 QW-R601-032.b BB178 Preliminary DIODE ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Continuous Reverse Voltage VR 32 V In series with a 10 kΩ VRM Peak Reverse Voltage 35 V resistor Continuous Forward Current IF 20 mA Storage Temperature TSTG -40~+150 °C Operating Junction Temperature TJ -40~+125 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (TJ =25°C unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS VR = 30 V VR = 30 V, TJ=85 °C f = 100 MHz, VR is the value at which Cd=30pF VR = 1 V, f = 1 MHz VR = 28 V, f = 1 MHz Reverse Current IR Diode Series Resistance rS Diode Capacitance Cd Capacitance Ratio Cd(1V) Cd(2V) f = 1 MHz Capacitance Ratio Cd(1V) Cd(28V) f = 1 MHz Capacitance Ratio Cd(25V) Cd(28V) f = 1 MHz Capacitance Matching ∆Cd Cd VR = 1~28 V, in a sequence of 15 diodes (gliding) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX UNIT 10 nA 200 nA 0.65 34.65 2.361 0.8 Ω 42.35 2.754 pF pF 2 % 1.3 13.5 1.08 2 of 3 QW-R601-032.b BB178 Preliminary DIODE UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 3 QW-R601-032.b