BB844 Silicon Variable Capacitance Diode • For FM radio tuner with extended frequency band 77MHz to 108MHz • Designed for application requiring back-to-back diode configuration for optimum signal distortion and detuning • High tuning ratio at low supply voltage (car radio) • Monolitic chip (common cathode) for perfect dual diode tracking • Good C- V linearity • High figure of merit • Pb-free (RoHS compliant) package 1) • Qualified according AEC Q101 BB844 ! , , Type BB844 Package SOT23 Configuration common cathode Maximum Ratings at TA = 25°C, unless otherwise specified Symbol Parameter LS(nH) 1.8 Value Marking SNs Unit Diode reverse voltage VR 18 Peak reverse voltage VRM 20 Forward current IF 50 mA Operating temperature range Top -55 ... 150 °C Storage temperature Tstg -55 ... 150 1Pb-containing V package may be available upon special request 1 2007-04-20 BB844 Electrical Characteristics at TA = 25°C, unless otherwise specified Symbol Values Parameter min. typ. - - - - Unit max. DC Characteristics Reverse current IR VR = 16 V VR = 16 V, TA = 85 °C nA 20 200 AC Characteristics Diode capacitance pF CT VR = 2 V, f = 1 MHz 42.5 43.75 45 VR = 4 V, f = 1 MHz 25 27 29 VR = 8 V, f = 1 MHz 10 11.5 13 CT2 /CT8 3.2 3.8 - ∆CT/CT - - 1.5 % rS - 0.28 - Ω Capacitance ratio VR = 2 V, VR = 8 V, f = 1 MHz Capacitance matching1) VR = 2V to 8V , f = 1 MHz Series resistance VR = 2 V, f = 100 MHz 1For details please refer to Application Note 047. 2 2007-04-20 BB844 Diode capacitance CT = ƒ (VR) Capacitance ratio CTref /CT = ƒ (V R) f = 1MHz f = 1MHz 5 90 pF CTref/C T 70 60 CT CT1V/CT 4 3.5 CT2V/CT 3 50 2.5 40 2 30 1.5 CT8V/CT 20 1 10 0.5 0 -1 10 10 0 10 1 V 10 0 0 2 1 2 3 4 5 6 7 8 V 10 VR VR Temperature coefficient of the diode capacitance TCc = ƒ (VR) 0.0006 1/C° TCc 0.0005 0.00045 0.0004 0.00035 0.0003 0.00025 0.0002 1 2 3 4 5 6 7 8 V 10 VR 3 2007-04-20 Package SOT23 BB844 0.4 +0.1 -0.05 1) 2 0.08...0.1 C 0.95 1.3 ±0.1 1 2.4 ±0.15 3 0.1 MAX. 10˚ MAX. B 1 ±0.1 10˚ MAX. 2.9 ±0.1 0.15 MIN. Package Outline A 5 0...8˚ 1.9 0.2 0.25 M B C M A 1) Lead width can be 0.6 max. in dambar area Foot Print 0.8 0.9 1.3 0.9 0.8 1.2 Marking Layout (Example) Manufacturer EH s 2005, June Date code (YM) Pin 1 BCW66 Type code Standard Packing Reel ø180 mm = 3.000 Pieces/Reel Reel ø330 mm = 10.000 Pieces/Reel 4 0.2 8 2.13 2.65 0.9 Pin 1 1.15 3.15 4 2007-04-20 BB844 Edition 2006-02-01 Published by Infineon Technologies AG 81726 München, Germany © Infineon Technologies AG 2007. All Rights Reserved. Attention please! The information given in this dokument shall in no event be regarded as a guarantee of conditions or characteristics (“Beschaffenheitsgarantie”). With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. 5 2007-04-20