a Clock Driver AD246 GENERAL DESCRIPTION AD246 SPECIFICATIONS The AD246 is a compact, inexpensive clock driver that can be (Typical @ 25∞C and VS = 15 V, unless otherwise noted.) used to obtain the required clock from a single 15 V supply. The Model AD246JY AD246JN circuit shown in Figure 1 (essentially an AD246) can operate at least 32 AD204s at the rated minimum supply voltage of 14.25 V OUTPUT* and one additional isolator can be operated for each 40 mV Frequency 25 kHz Nominal 25 kHz Nominal increase in supply voltage up to 15 V. Voltage 15 V p-p Nominal 15 V p-p Nominal A supply bypass capacitor is included in the AD246, but if many Fan Out 32 max 32 max AD204s are operated from a single AD246, an external bypass POWER SUPPLY connector should be used with a value of at least 1 mF for every REQUIREMENTS five isolators used. Place the capacitor as close as possible to the Input Voltage 15 V ± 5% 15 V ± 5% clock driver. Supply Current Unloaded 35 mA 35 mA 15V 180pF1 C14 6 5 TETLSECD46Y2N6E IN914 EAadcdhs A1 Dm2A04 2.2 mA 2.2 mA 2 10 2 7 Load on AD204 RC CD Q CLKOUT +V or 3 R 4947B 4 5 +1(cid:1)F –VISO Adds 0.7 mA 0.7 mA 49.9k(cid:2) IN914 35V ISO *The high current drive will not support a short to ground. 12 9 8 7 4 3 CLK AND Specifications are subject to change without notice. PWR COM Figure 1.Clock Driver AD246 Pin Designations Pin (Y) Pin (N) Function 1 12 15 V Power In 2 1 Clock Output 12 14 Common 13 24 Common OUTLINE DIMENSIONS AD246JY Package AD246JN Package Dimensions shown in inches and (millimeters) Dimensions shown in inches and (millimeters) 8.40 (0.330) MAX 36.70 (1.445) MAX 25.30 (0.995) MAX AD246JN 8.90 (0.350) MAX FRONT VIEW AFRDO2NT4 V6IJEWY (10M5.6A.92X05) VSIIEDWE 2.50 (0.1M0I0N) 0.51 (0.020) 0.51 (0.020) 0.25 (0.010) 0.38 (0.015) 0.38 (0.015) 3.70 (0.145) 2.50 (0.100) 1.30 (0.050) 0.25 (0.010) 27.90 (1.100) MIN NOM 2.90 (0.115) 2.50 (0.100) 1 12 14.00 (0.550) NOM 5.00 (0.197) 0.38 (0.015) 12.70 17.80 0.25 (0.010) (0. 500) BOTTOM VIEW (0.700) 2.90 (0.115)CL 1 BOVTIETWOM 13 2(0.5.1000) 24 14 2 12 25.40 (1.000) CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. may result from its use. No license is granted by implication or otherwise Tel: 781/329-4700 www.analog.com under any patent or patent rights of Analog Devices. Fax: 781/326-8703 © Analog Devices, Inc., 2002

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