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Laser Driver Ba andwidt at Low Current Output th w t t Rev A. Nov 2012 The ana alog modulatio on bandwidth* of the LDC5 h 500, freq quency responses for LDC C500/501, an LDC502, nd LDC501 an nd LDC502 is s specified for o operation at 550% are shown in Figu ures 1 and 2. of full scalee DC output (5 50% FS). Whe en the DC currrent setting is v very low, say 2% FS, the baandwidth will be l From the figu F ure, when the current settin ng is above lower. To a achieve higher r frequency m modulation at low 40% FS, the ba % measured to be around andwidth is m DC bias, directly injecti ing RF curren into the la nt aser 1MH For example, at low ra Hz. ange on the LDC501, full diode can be used, wh hich is descr ther ribed in anot scal is 250mA. 40% FS gi le ives 100mA. When the application n note on our w website.