Ordering number : EN6017A Monolithic Linear IC LA1225M FM IF Detector IC Overview The LA1225M is a Low-voltage operation (1.8V or higher) FM IF detector IC for the electronic 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: MFP-10S Functions • IF amplifier • Quadrature detector • Signal meter • SD • IF buffer Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Symbol Conditions Ratings VCC max Pd max Ta ≤ 85°C Unit 9.0 V 100 mW Operating temperature Topr -20 to +85 °C Storage temperature Tstg -55 to +150 °C Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Operating supply voltage range VCC op Conditions Ratings Unit 3.0 V 1.8 to 8.0 V Any and all SANYO Semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. SANYO Semiconductor assumes no responsibility 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 products described or contained herein. 92706 / 42406 MS OT B8-6906 No.6017A-1/8 LA1225M Operating Characteristics at Ta = 25°C, VCC = 3.0V, fC = 10.7MHz Ratings Parameter Symbol Current drain ICCO min typ Unit max No input 3.0 4.0 5.0 mA VO 100dBµ, 100% mod., fm = 1kHz 70 150 220 mV THD 100dBµ, 100% mod., fm = 1kHz 0.5 0.8 % 37 dBµ Demodulator output Total harmonic distortion Conditions Signal-to-noise ratio S/N 100dBµ, 100% mod., fm = 1kHz 65 73 100dBµ, 100% mod., 19 28 dB 3dB sensitivity -3dBL.S SD sensitivity SDON 0% mod. 35 50 65 dBµ IF counter buffer output VIFBuff 100dBµ 90 130 170 mV fm = 1kHz output reference, when the input is -3dB Package Dimensions unit : mm 3086B 5 6.4 1 0.15 0.1 (1.5) 1.7max 4.4 6 0.63 5.0 10 0.35 1.0 (0.5) SANYO : MFP10S(225mil) No.6017A-2/8 LA1225M Block Diagram and Test Circuit Sample Application Circuit No.6017A-3/8 LA1225M Pin Functions No-Signal Voltage at VCC = 3.0V Pin No. Function No-signal voltage (V) 1 IF input 1.2 Equivalent circuit Notes Input impedance RIN = 330Ω 2 Reg 1.2 3 GND 0 4 S-meter output 0.1 Vreg = 1.2V Open collector output. The SD sensitivity can be adjusted with an external resistor connected to this pin. 5 VCC 3.0 6 Demodulated output 1.5 Output impedance ROUT = 3kΩ 7 DET 3.0 The detector coil is inserted between pin 7 and pin 5 (VCC). Continued on next page. No.6017A-4/8 LA1225M Continued from preceding page. Pin No. Function No-signal voltage (V) 8 Limiter amplifier output 2.8 Notes Equivalent circuit Pin 8 and pin 7 (DET) are connected through a capacitor. 9 IF buffer 0 (Also used for control SW) 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. (ICmax = 20mA) No.6017A-5/8 LA1225M No.6017A-6/8 LA1225M PS No.6017A-7/8 LA1225M Specifications of any and all SANYO Semiconductor 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. SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage 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. In the event that any or all SANYO Semiconductor products (including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining 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 permission of SANYO Semiconductor Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO Semiconductor believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of April, 2006. Specifications and information herein are subject to change without notice. PS No.6017A-8/8