BB844

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 LS(nH) 1.8 Marking SNs Maximum Ratings at TA = 25°C, unless otherwise specified Parameter Diode reverse voltage Peak reverse voltage Forward current Operating temperature range Storage temperature 1Pb-containing Symbol VR VRM IF Top Tstg Value 18 20 50 -55 ... 150 -55 ... 150 Unit V mA °C package may be available upon special request 1 2007-04-20 BB844 Electrical Characteristics at TA = 25°C, unless otherwise specified Parameter DC Characteristics Reverse current VR = 16 V VR = 16 V, TA = 85 °C AC Characteristics Diode capacitance VR = 2 V, f = 1 MHz VR = 4 V, f = 1 MHz VR = 8 V, f = 1 MHz CT Symbol min. IR - Values typ. 20 200 max. Unit nA pF 42.5 25 10 3.2 43.75 27 11.5 3.8 0.28 45 29 13 1.5 % Ω Capacitance ratio VR = 2 V, VR = 8 V, f = 1 MHz CT2 /CT8 ∆CT/CT rS 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) f = 1MHz Capacitance ratio CTref /CT = ƒ (V R) f = 1MHz 90 pF 5 CTref/C T 70 60 50 4 3.5 3 2.5 CT1V/CT CT2V/CT CT 40 2 30 20 10 0 -1 10 1.5 CT8V/CT 1 0.5 0 1 2 10 10 V 10 0 0 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° 0.0005 TCc 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 Package Outline 0.15 MIN. 1 ±0.1 0.1 MAX. 1.3 ±0.1 2.9 ±0.1 3 B 2.4 ±0.15 10˚ MAX. 0.4 +0.1 -0.05 1) 1 2 10˚ MAX. C 0.95 1.9 0.08...0.1 A 5 0...8˚ 0.25 M B C 0.2 M A 1) Lead width can be 0.6 max. in dambar area Foot Print 0.8 0.9 0.8 1.2 Marking Layout (Example) Manufacturer EH s Pin 1 0.9 1.3 2005, June Date code (YM) BCW66 Type code Standard Packing Reel ø180 mm = 3.000 Pieces/Reel Reel ø330 mm = 10.000 Pieces/Reel 4 0.9 2.13 2.65 0.2 8 Pin 1 3.15 1.15 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