AD246

a GENERAL DESCRIPTION Clock Driver AD246 AD246 SPECIFICATIONS (Typical @ 25∞C and VS = 15 V, unless otherwise noted.) The AD246 is a compact, inexpensive clock driver that can be used to obtain the required clock from a single 15 V supply. The circuit shown in Figure 1 (essentially an AD246) can operate at least 32 AD204s at the rated minimum supply voltage of 14.25 V and one additional isolator can be operated for each 40 mV increase in supply voltage up to 15 V. A supply bypass capacitor is included in the AD246, but if many AD204s are operated from a single AD246, an external bypass connector should be used with a value of at least 1 mF for every five isolators used. Place the capacitor as close as possible to the clock driver. 180pF 1 2 3 49.9k⍀ 12 9 8 7 4 3 14 C RC R CD 4947B Q 10 2 4 6 5 6 TELEDYNE TSC426 15V IN914 7 5 IN914 CLKOUT + 1␮F 35V CLK AND PWR COM Model OUTPUT* Frequency Voltage Fan Out POWER SUPPLY REQUIREMENTS Input Voltage Supply Current Unloaded Each AD204 Adds 1 mA Load on AD204 +VISO or –VISO Adds AD246JY AD246JN 25 kHz Nominal 25 kHz Nominal 15 V p-p Nominal 15 V p-p Nominal 32 max 32 max 15 V ± 5% 35 mA 2.2 mA 15 V ± 5% 35 mA 2.2 mA 0.7 mA 0.7 mA *The high current drive will not support a short to ground. Specifications are subject to change without notice. Figure 1. Clock Driver AD246 Pin Designations Pin (Y) 1 2 12 13 OUTLINE DIMENSIONS AD246JY Package Dimensions shown in inches and (millimeters) 8.40 (0.330) MAX 25.30 (0.995) MAX Pin ...