ADT2520BXX * this specifications are subject to be changed without notice http://www.ad-tech.co.kr general description features ? wide operating supply voltage 2.7v ~ 5.5v ? internal voltage reference circ uit for wide operating built-in. ? no external components necessary. ? suitable for minimum burst leng th of 6 pulses per burst. ? continuous codes ( <1ms pause time ) are acceptable. ? output active low. ? carrier frequency 37.9 /56 khz available the ADT2520BXX is a miniaturized rece iver ic for infrared remote control system. it has a wide voltage operating such as 2.7~5.5v, a high sensitivity. wide operating voltage is very suitable to the hand-held battery operating systems, e.g., electrical toy. it has 5 trimming cells for the fi ned adjust of center frequency. these ics are capable of accept ing a photodiode directly and include many excellent circuit such as a high gain initial amplifier, a gain control amplifier, a limiter, a band pass filter, a detection circuit, two comparator circuits, gain control circuits, integrator circuits, a waveform shaping circuit assembled on a single chip.
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