ADT2510 feb. 02. 2007 / rev. 0.1 1/4 * this specifications are subject to be changed without notice http://www.ad-tech.co.kr general description features absolute maximum ratings * stress above those listed under absolute maximum ratings may cause permanent damage of device. this is stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for longer periods may affect device reliability. during overload conditions (vin>vcc or vinADT2510 is a miniaturized receiver ic for use in the infrared remote control system. it has a wide voltage operating such as 2.7~5.5v, a high sensitivity, and good noise immunity. it has high noise immunity from external light source disturba nce which are general fluorescent lamp, incandescent lamp etc. it has the frequency selecting pads for setting th e center frequency of band-pass filter and also has 5 trimming pads for the fined adjust of center frequency. these ics is capable of accepti ng a photodiode directly and incl ude many excellent circuit such as a high gain initial amplifier, a gain control amplifier, a limite r, a band pass filter, a detection circuit, two comparator circuits, gain control circuits, integrator circuits, a waveform shaping circuit assembled on a single chip. ? wide operating supply voltage 2.7v ~ 5.5 v ? internal voltage reference circ uit for wide operating built-in. ? excellent interference safety against external light sources. ? no external components necessary. ? the center frequency can be varied with option pads ( 36.0khz, 37.9khz, 40.0khz, 56.7khz) ? internal filter for a high frequency lighting fluorescent lamp. ? built-in automatic bias control for sunlight. ? output active low. parameter symbol min. max. unit supply voltage vcc 0 6.0 v output voltage vout 0 6.0 v output current iout 0 2.5 ma operating temperature topr -20 80 storage temperature tst -40 125
ADT2510 feb. 02. 2007 / rev. 0.1 2/4 * this specifications are subject to be changed without notice http://www.ad-tech.co.kr recommended operating conditions functional block diagram fc (center frequency) pad setting method s1 s2 36.0khz gnd gnd 37.9khz floating floating 40.0khz floating gnd 56.7khz gnd floating in pre amp i-v converter & input bias control agc amp limit amp band-pass filter frequency setting frequency trimming fset bias circuit noise det. & gain ctrl. comparator integrator & wave shaping output stage trimming pads(t1~t5) freq.selection option pads (s1,s2) gnd vcc voltage reference circuit out parameter symbol min. typ. max. unit operating voltage vcc 2.7 5.0 5.5 v input frequency fin 30 37.9 60 khz operating temperature top -20 25 80
ADT2510 feb. 02. 2007 / rev. 0.1 3/4 * this specifications are subject to be changed without notice http://www.ad-tech.co.kr electrical specifications specifications hold over the recommended operating conditions, unless otherwise noted herein. all values are at 25 and vcc=3.0v/5.0v note 1 : (input burst waveform) (output pulse) 600 ? 600 ? 600 ? 600 ? carrier frequency : 37.9khz parameter symbol min. typ. max. unit conditions supply current i cc - 0.9 1.5 ma iin=0 a, vcc=3v - 1.0 1.5 ma iin=0 a, vcc=5v max. voltage gain a v 65 72 80 db fin=37.9khz, vin=30 ? p-p bpf bandwidth f bw 4 5.8 8 khz -3db bandwidth vin=30 ? p-p output pulse width t pw1 500 600 800 usec fin=37.9khz, burst wave vin=500 ? p-p note*1 t pw1 500 600 800 usec fin=37.9khz, burst wave vin=50 mvp-p note*1 low level output voltage v ol - 0.15 0.3 v isink=2.5ma high level output voltage v oh 2.7 3.0 - v vcc=3v 4.7 5.0 - v vcc=5v
ADT2510 feb. 02. 2007 / rev. 0.1 4/4 * this specifications are subject to be changed without notice http://www.ad-tech.co.kr application guide in fc set pins gnd vcc out s1 s2 vcc out gnd ADT2510 1. example of module(37.9khz) packaging using ADT2510 2. functional guide of ADT2510 -. ADT2510 is high gain amplifier for high sensitivit y. so if you want better characteristic of receivable distance, you have much careful attention in bonding of gnd pads and shielding to gnd. -. for more better distance performance,it is important to suppress the supply noise. the supply filter r 1 ,c 1 have to be located close to ic if possible -. the photo diode are the important factor in ir receiver module and you select it considerately. -. in packaging of ir module, the photo lens is good for receiving of photo signal. but if the chip is included in the lens , the chip also receives the photo signal and the signal acts as a noise in the chip. so when you design the lens or module fram e, the above point must be considered. -. in the detection or demodulation(wave shape) of incoming signal, ADT2510 need the minimum burst length of modulated signals. the incoming photo signal is modulated with proper carrier signal(e.g.37.9khz) and if the ?1? data bit is modulated with carrier signal, the period of data bit?1? is important. because the carrier signals is in this period, in the integrator& wave shape block of ADT2510 the integration need minimum period to the reach of appropriately level. hence the minimum burst length is important characteristic and specification of remote control systems. the minimum burst length of ADT2510 is about 10 cycles of carrier. (~10*tfc) you can easily understand as see the figure 1. figure 1. (integrator output) burst length carrier frequency : 37.9khz (output pulse) (input burst waveform) the minimum burst length * the min. burst length of ADT2510 : ~10cycles of carreier (~10*tfc) c 1 : 4.7uf r 1 : 100ohm
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