HL3280 1 preamplifier for remote control use the HL3280 is a miniaturized receiver ic for use in the infrared re mote control system. it has a wide voltage operating such as 2.7~5.5v, a high sensitivity, and good noise immunity. wide operating is very suitable to the hand-held battery operating systems, such as electrical toy. this can also be suitable for high optical and electrical disturbances. it has the frequency selecting pads for setting the center frequency of band-pass filter and also has 5 trimming pads for the fine adjustment of center frequency. the HL3280 is capable of accepting a photodiod e directly and incl ude many excellent circuit such as an internal voltage reference for wide voltage operating, a high gain initial amplifier, a gain control amplifier, a limiter, a band pass filter, a detection circuit, two comparator circuits, gain control circuits, in tegrator circuits, a waveform shaping circuit assembled on a single chip. ? wide operating supply voltage 2.7v ~ 5.5 v ? built-in internal voltage reference circuit for wide operating ? maximum interference safety against optical and electrical disturbances ? no external components necessary ? the center frequency can be varied with option pads ( 32.7khz, 36.7khz, 37.9khz, 40khz, 56.7khz) ? internal filter for a high frequency lighting fluorescent lamp ? open collector output (open collector output with a pull-up resistor) ? output active low version 2 published by magnachip semiconductor, ltd. oct. 25 2004. all right reserved. additional information of this datasheet ma y be served by magnachip semiconductor offices in korea or distributors and represen tatives listed at address directory. magnachip semiconductor reserves the right to make changes to any informati on here in at any time without notice. the information, diagrams and ot her data in this datasheet are correct and re liable; however, magnach ip semiconductor is in no way responsible for any violations of patents or other rights of the third part y generated by the use of this manual. 1. overview 1.1 description 1.2 features
HL3280 2 2. electrical characteristics 2.1 absolute maximum ratings symbol vcc min. 0 unit v parameter supply voltage vout 0 v output voltage iout 0 ma output current max. 6.0 6.0 2.5 conditions topr -25 ? operating temperature tst -40 ? storage temperature 85 125 * stress above those listed under absolute maximum ratings may cause permanent damage of device. this is stress rating only and functional oper ation of the device at these or any other conditio ns 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 vin HL3280 3 tpw1 500 - 800 ? fin=37.9khz, burst wave vin=500 ? p-p *note 1 output pulse width tpw2 500 - 800 ? fin=37.9khz, burst wave vin= 50mvp-p *note 1 vol - - 0.25 v isink=2.0ma low level output voltage voh 2.7 3.0 - v vcc=3v high level output voltage *note 1. (input burst waveform) (output pulse) 600 ? 600 ? 600 ? carrier frequency : 37.9khz 4.7 5.0 - v vcc=5v 600 ? 2.3 electrical specifications specifications hold over the recommended operating conditions, unless otherwise noted herein. all values are at 25 ? and vcc=3.0v/5.0v . symbol min. typ. max. unit conditions parameter icc - 1.3 2.5 ma iin = 0 ? , vcc=3v supply current iin 0.8 - 1.75 ma iin = 0 ? , vcc=5v max. input current av 85 95 110 db fin=37.9khz, vin=30 ? p-p, vcc=3v max. voltage gain fbw 5 7 9 khz -3db bandwidth vin=30 ? p-p bpf bandwidth - 1.2 2.5 ma iin = 0 ? , vcc=5v 85 95 110 db fin=37.9khz, vin=30 ? p-p, vcc=5v
HL3280 4 3. functional block diagram gnd in integ- rator & wave shaping output stage band pass filter compa- rator threshold control circuit fc setting out freq. selection option pads (s1~s4) vcc noise det. & gain ctrl. i-v convert & input bias control fc trimming trimming pads (t1~t5) voltage reference circuit pre amp agc amp limit amp fset bias circuit * fc(center frequency) can be varied with 4 option pins. : 32.7khz, 36.7khz, 37.9khz, 40.0khz, 56.7khz fc(center frequency) pad setting method (s1,s2,s3,s4) 32.7 khz no connection 36.7 khz s1(pad6) is ground 37.9 khz s2(pad5) is ground 40.0 khz 56.7 khz s3(pad3) is ground s4(pad2) is ground
HL3280 5 2 3 4 5 6 7 8 9 10 1 11 12 13 14 15 16 HL3280 ? chip size : 1460 um x 1200um (with scribe lane) ? pad open size : 100 x 100 um (80 x 90 um for trimming and test pad) u.r.(1460,1200) l.l.( 0 , 0 ) vcc gnd out gnd 282.5 , 1051.5 trimming pad t3 16 422.5 , 1051.5 trimming pad t2 15 562.5 , 1051.5 trimming pad t1 14 702.5 , 1051.5 trimming pad t4 13 842.5 , 1051.5 trimming pad t5 12 1012.5, 1045 signal output pad output 11 1322.5, 1028.5 ground pad for output gnd 10 1328 , 868.5 pad for test mp1 9 1322.5, 135 ground pad gnd 8 292.5 , 135 signal input pad in 7 132.5 , 138 bpf frequency selection pad s1 6 132.5 , 298 bpf frequency selection pad s2 5 127.5 , 448 pad for test mp2 4 132.5 , 703 bpf frequency selection pad s3 3 132.5 , 863 bpf frequency selection pad s4 2 132.5 , 1023 vcc pad vcc 1 pad (x,y) description pad name pad number scribe lane : 50um 4. floor planning diagram(fc=37.9khz) 5. pads description gnd
HL3280 6 6. application guide in fc set pins gnd vcc out s1 s2 s3 s4 vcc out gnd HL3280 6.1 example of module(37.9khz) packaging using HL3280 c1:4.7uf r1:100 ? 6.2 functional guide of HL3280 ? HL3280 is high gain amplifier for high sensitiv ity. so if you want better characteristics 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 r1, c1 have to be located close to ic if possible. ? the photo diode is important factor in ir re ceiver module and you se lect 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 frame, the above point must be considered. ? in the detection or demodulation(wave shape) of incoming signal, HL3280 need the minimum burst length of modulated signals. the incoming photo signal is modulated with pr oper 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, the integration need minimum period to the reach of appropriately level in the integrator & wave shape block of HL3280. hence the minimum burst length is important characteristic and specification of remote control systems. the minimum burst length of HL3280 is about 10 cycles of carrier. (~10*tfc) you can easily understand as see the figure 1. figure 1. (input burst waveform) (integrator output) burst length carrier frequency : 37.9khz (output pulse) minimum burst length * the minimum burst length of HL3280:~10cycles of carrier (~10*tfc)
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