FAQ: AD8309 Limiter impedance

Document created by Jim Employee on Jan 20, 2010Last modified by AndyR on Jan 31, 2012
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What is the impedance of the limiter in the AD8309?




The limiter used in the AD8309 is an open collector circuit. The impedance is determined by the value of the pull up resistors used. The minimum resistor value is 50 ohms. Since the limiter circuit is differential, the minimum impedance would be 100 ohms differential.