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. 2 1 SOD-523 FEATURES * Excellent matching to 2% DMA * Ultra low series resistance. * Great linearity * C28: 2.6 pF; ratio: 15 ORDERING INFORMATION Ordering Number Lead Free Halogen Free BB178L-CC2-R BB178G-CC2-R Note: Pin Assignment: A: Anode, K: Cathode Package SOD-523 Pin Assignment 1 2 A K Packing Tape Reel MARKING 78 G: Halogen Free L : Lead Free www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 2 QW-R601-032.a BB178 Preliminary DIODE ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Continuous Reverse Voltage VR 32 V Peak Reverse Voltage In series with a 10 kΩ resistor VRM 35 V 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 MIN TYP MAX UNIT VR = 30 V 10 nA VR = 30 V, TJ=85 °C 200 nA f = 100 MHz, VR is the value at 0.65 0.8 Ω which Cd=30pF VR = 1 V, f = 1 MHz 34.65 42.35 pF VR = 28 V, f = 1 MHz 2.361 2.754 pF 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 ΔCd Cd VR = 1~28 V, in a sequence of 15 diodes (gliding) 1.3 13.5 1.08 2 % 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 2 of 2 QW-R601-032.a