41812 sy 20120411-s00004 no.a2052-1/8 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 LA1225MC overview the LA1225MC is a low-voltag e operation (1.8v or higher) fm if detect or ic for the electro nic tuning system. features ? low-voltage operation (1.8v or higher) ? supports electronic tuning systems (provides built-in sd output and if count output functions) ? fm detector circuit accepts an even wider input frequency range. (supports the use of an external phase capacitor.) ? miniature package: soic10 functions ? if amplifier ? quadrature detector ? signal meter ? sd ? if buffer specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max 9.0 v allowable power dissipation pd max ta 85 c 100 mw operating temperature topr -20 to +85 c storage temperature tstg -55 to +150 c operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc 3.0 v operating supply voltage range v cc op 1.8 to 8.0 v ordering number : ena2052 monolithic linear ic fm if detector ic stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above the recommended oper ating conditions is not implied. extended exposure to stresses above the recommended operating conditions may affect device reliabili ty.
LA1225MC no.a2052-2/8 operating characteristics at ta = 25 c, v cc = 3.0v, f c = 10.7mhz parameter symbol conditions ratings unit min typ max current drain i cco no input 3.0 4.0 5.0 ma demodulator output v o 100db v, 100% mod., fm = 1khz 70 150 220 mv total harmonic distortion thd 100db v, 100% mod., fm = 1khz 0.5 0.8 % signal-to-noise ratio s/n 100db v, 100% mod., fm = 1khz 65 73 db 3db sensitivity -3dbl.s 100db v, 100% mod., fm = 1khz output reference, when the input is -3db 19 28 37 db v sd sensitivity sd on 0% mod. 35 50 65 db v if counter buffer output v ifbuff 100db v 90 130 170 mv package dimensions unit : mm 3426 sanyo : soic10 5.0 4.4 6.4 6 10 5 1 0.835 0.15 0.37 0.35 1.0 0.175 1.5 1.75 max
LA1225MC no.a2052-3/8 block diagram and test circuit sample application circuit + 1 10 2 9 3 8 4 7 5 6 + + reg sd if amp if buff gnd s-meter v cc det fm if in v sm v cc det out if buff strq sd + 1 10 2 9 3 8 4 7 5 6 + + fm if in v sm v cc = 3.0v if buff strq sd LA1225MC 75 330 0.047 f 10 f1 f 100 f 0.015 f det out 0.047 f 15k 0.047 f detcoil; yt-30103 3.9k 2pf 1000pf 10k 3.0v 3.3k 0.047 f
LA1225MC no.a2052-4/8 pin functions no-signal voltage at v cc = 3.0v pin no. function no-signal voltage (v) equivalent circuit notes 1 if input 1.2 input impedance r in = 330 2 reg 1.2 vreg = 1.2v 3 gnd 0 4 s-meter output 0.1 open collector output. the sd sensitivity can be adjusted with an external resistor connected to this pin. 5 v cc 3.0 6 demodulated output 1.5 output impedance r out = 3k 7 det 3.0 the detector coil is inserted between pin 7 and pin 5 (v cc ). continued on next page.
LA1225MC no.a2052-5/8 continued from preceding page. pin no. function no-signal voltage (v) equivalent circuit notes 8 limiter amplifier output 2.8 pin 8 and pin 7 (det) are connected through a capacitor. 9 if buffer (also used for control sw) 0 the if buffer output is turned on when the voltage applied to the pin is the recommended 1.5v or higher. 10 sd 1.6 this is an active-low output. this is an open-collector output and can directly drive an led. (i c max = 20ma)
LA1225MC no.a2052-6/8
LA1225MC ps no.a2052-7/8
LA1225MC ps no.a2052-8/8 on semiconductor and the on logo are registered trademarks of semiconductor components industries, llc (scillc). scillc owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. a listing of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent-marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc mak es no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability ar ising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s techn ical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorize d for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other appli cation in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of persona l injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture o fthe part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws a nd is not for resale in any manner.
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