KV1845K VARIABLE CAPACITANCE DIODE FEATURES APPLICATIONS ■ ■ ■ ■ ■ ■ UHF Communications Equipment ■ Voltage Controlled Oscillator ■ 900 MHz Communications Systems Very Small URD Surface Mount Package Very Low Series Resistance Large Capacitance Ratio (A = 2.2 minimum) Excellent Linearity (CV Curve) Very Small Capacitance Deviation at Tape/Reel DESCRIPTION The KV1845K is a variable capacitance diode designed for UHF applications. The KV1845K is available in a very small URD Surface Mount Package. CLASSIFICATION RANK 1 2 3 MIN 9.45 9.80 10.75 MAX 10.05 11.00 11.35 C C1 (Unit: pF) KV1845K Note: Rank is determined after testing and marked on the reel. All the diodes on a reel have the same rank, but rank can not be specified when ordering. ORDERING INFORMATION KV1845K Tape/Reel Code TAPE/REEL CODE TR: Tape Right October 1999 TOKO, Inc. Page 1 KV1845K ABSOLUTE MAXIMUM RATINGS Reverse Voltage ....................................................... 15 V Forward Current ...................................................... 7 mA Power Dissipation ................................................ 25 mW Storage Temperature Range ................... -55 to +150 °C Operating Temperature Range ................... -55 to +85 °C ELECTRICAL CHARACTERISTICS Test conditions: TA = 25 °C SYMBOL PARAMETER TEST CONDITIONS MIN V REV Reverse Voltage IREV = 1 µA IREV Reverse Current VREV = 10 V C1 Diode Capacitance 1 VREV = 1 V, f = 1 MHz 9.45 C4 Diode Capacitance 4 VREV = 4 V, f = 1 MHz 4.15 RS Series Resistance C = 5 pF, f = 470 MHz A Capacitance Ratio C1 / C4 TYP MAX 10 UNITS V 5.00 nA 10.40 11.35 pF 4.67 5.19 pF 0.25 0.30 Ω 2.20 Note 1: Diode Capacitance measured with HP 4279A or equivalent instruments (at OSC level 20 mVrms, ± 5 mVrms). Note 2: Series Resistance measured with HP 4191A or equivalent instruments. Page 2 October 1999 TOKO, Inc. KV1845K TYPICAL PERFOMANCE CHARACTERISTICS CAPACITANCE vs. REVERSE VOLTAGE 100 1.08 1.0 TA = 25 °C f = 1 MHz C (TA C)/C (25 C) 10 f = 1 MHz 1.06 f = 470 MHz RS (Ω) CAPACITANCE (pF) C (TA °C)/C (25 °C) vs. REVERSE VOLTAGE SERIES RESISTANCE vs. REVERSE VOLTAGE 1.04 TA = 85 °C 55 °C 25 °C 1.02 1.00 0.98 -15 °C 0.96 -55 °C 0.94 1 0 2 4 0.1 0 6 2 0.01 0.92 0 6 1 2 3 4 5 VREV (V) VREV (V) QUALITY FACTOR vs. REVERSE VOLTAGE SERIES RESISTANCE vs. FREQUENCY VREV (V) REVERSE CURRENT vs. REVERSE VOLTAGE 4 1000 1.00 TA = 25 °C VR = 3.5 V TA = 25 °C f = 50 MHz TA = +85°C 6 100 MHz Q 0.001 470 MHz RS (Ω) IREV (nA) 300 MHz 100 TA = +55°C TA = +25°C 0.0001 0 10 2 4 6 8 10 VREV (V) 0 2 4 VREV (V) 6 0.10 100 1000 FREQUENCY (MHz) TEMPERATURE-COEFFICIENT vs. REVERSE VOLTAGE 1000 ∆C/ ∆TA (ppm/ C) TA = -55 °C to 85 °C f = 1 MHz 100 0 2 4 6 VREV (V) October 1999 TOKO, Inc. Page 3 KV1845K PACKAGE OUTLINE Marking Information UFD Product Code S 0.8 2.3 Marking 1.25 0.8 Cathode Mark Recommended Mount Pad 0 ~ 0.1 0.13 0.9 +0.15 -0.05 1.7 0.3 0.2 min + 0.3 2.5 Dimensions are shown in millimeters Tolerance: x.x = ± 0.2 mm (unless otherwise specified) Toko America, Inc. Headquarters 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 TOKO AMERICA REGIONAL OFFICES Midwest Regional Office Toko America, Inc. 1250 Feehanville Drive Mount Prospect, IL 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 Western Regional Office Toko America, Inc. 2480 North First Street , Suite 260 San Jose, CA 95131 Tel: (408) 432-8281 Fax: (408) 943-9790 Eastern Regional Office Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375 Visit our Internet site at http://www.tokoam.com The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc. Page 4 © 1999 Toko, Inc. All Rights Reserved October 1999 TOKO, Inc. IC-xxx-KV1845E 0798O0.0K Printed in the USA