specifications of any and all sanyo semiconductor co.,ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer ' s products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ' s products or equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. the products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for new introduction or other application different from current conditions on the usage of automotive device, communication device, office equipment, industrial equipment etc. , please consult with us about usage conditi on (temperature, operation time etc.) prior to the intended use. if there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. 41812 sy 20120411-s00004 no.a2052-1/8 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 orderin g number : ena2052 monolithic linear ic fm if detector ic
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 sanyo semiconductor co.,ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-quality high-reliab ility pr oducts, however, any and all semiconductor products fail or malfunction with some probab ility. it is possible that these pr obab ilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equip ment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor co.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. this catalog provides information as of april, 2012. specifications and info rmation herein are subject to change without notice.
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