LA1844M

Ordering number : EN7930A Monolithic Linear IC LA1844 LA1844M Overview For Home Stereo Single-chip Tuner IC The LA1844, LA1844M is designed for use in mini systems and is a single-chip tuner IC that provides electronic tuning functions using SD/IF-count technique. It incorporates a pilot canceler and an adjustment-free MUX VCO circuit, thus allows additional parts to be reduced. Features • Integrated MPX VCO (ceramic resonators are no longer required.) • Built-in adjacent channel interference rejection function (114kHz, 190kHz) • Supports both SD and IF-count techniques • Both FM SD sensitivity and bandwidth can be set • Pilot canceler built in. • Package : DIP24S(300mil) [LA1844], MFP24S(300mil) [LA1844M] Functions • AM : RF amplifier, mixer, oscillator, IF amplifier, detector, AGC, SD, oscillator buffer, IF buffer, stereo IF output, AGC time constant switch • FM IF : IF amplifier, quadrature detector, S-meter, SD (signal detection), S-curve detection, IF buffer output • MPX : PLL stereo decoder, stereo display, forced monaural, VCO stop, audio muting, adjacent channel interference rejection function, pilot canceler 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 usingany 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. 83006 / 52106 MS OT B8-7111 No.7930A-1/11 LA1844,LA1844M Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Symbol VCC max Pd max Ta ≤ 45°C Ta ≤ 80°C Operating temperature Storage temperature Topr Tstg Conditions Ratings 9 400 260 -20 to +80 -20 to +150 Unit V mW mW °C °C Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Conditions Ratings 5 4.3 to 8.0 Unit V V Electrical Characteristics at Ta = 25°C FM Mono Characteristics at fC = 10.7MHz, VCC = 5V Ratings Parameter Current drain Demodulator output Total harmonic distortion Signal-to-noise ratio AM rejection ratio 3dB sensitivity SD sensitivity IF counter buffer output Mute attenuation Symbol ICCO-FM VOFM THDFM mono S/NFM AMR Vi-limit LED Sens VIFBuff-FM Mute-Att With no input signal 100dBμ, 100% modulation, fm = 1kHz 100dBμ, 100% modulation, fm = 1kHz 100dBμ, 100% modulation, fm = 1kHz 100dBμ, AM 30% modulation, fm = 1kHz 100dBμ, 100% modulation, fm = 1kHz output reference, -3dB input 0% modulation 100dBμ 100dBμ, 100% modulation, fm = 1kHz 37 200 47 275 76 57 400 dBμ mVrms dB 73 47 Conditions min 18 210 typ 28 330 0.35 80 65 32 40 max 38 420 1.5 Unit mA mVrms % dB dB dBμ FM Stereo Characteristics at fC = 10.7MHz, 100dBμ, VCC = 5V Ratings Parameter Separation Stereo on level Total harmonic distortion Adjacent channel rejection ratio 1 Adjacent channel rejection ratio 2 Carrier leak Symbol Sep STON THD-main BR1 BR2 CL Conditions L+R = 90%, Pilot = 10%, fm = 1kHz Pilot input Pilot input fs = 113kHz, Vs = 90%, pilot = 10% : The left - right modulation, demodulated output fs = 189kHz, Vs = 90%, pilot = 10% : The left - right modulation, demodulated output L+R = 90%, pilot = 10% reference, pilot = 10% output 38 44 dB 41 dB min 30 1.5 typ 42 3.5 0.45 36 5.5 1.5 max Unit dB % % dB AM Characteristics at fC = 1000kHz, VCC = 5V Ratings Parameter Current drain Detector output Symbol ICCO-AM VOAM1 VOAM2 Signal-to-noise ratio S/NAM1 S/NAM2 Total harmonic distortion THDAM1 THDAM2 SD sensitivity Local oscillator buffer output IF counter buffer output SD-Sens VOSC-AM VIFBuff-AM With no input signal 23dBμ, 30% modulation, fm = 1kHz 80dBμ, 30% modulation, fm = 1kHz 23dBμ, 30% modulation, fm = 1kHz 80dBμ, 30% modulation, fm = 1kHz 80dBμ, 30% modulation, fm = 1kHz 107dBμ, 30% modulation, fm = 1kHz 0% modulation With no input signal 23dBμ 11 100 140 Conditions min 11 40 90 17 48 typ 22 80 160 23 54 0.4 0.5 21 140 285 1.1 1.3 31 200 400 max 33 160 230 Unit mA mVrms mVrms dB dB % % dBμ mVrms mVrms No.7930A-2/11 LA1844,LA1844M Package Dimensions unit : mm 3067B [1844M] 21.0 24 13 24 3112B [LA1844] 12.5 13 7.62 6.4 5.4 7.6 0.25 1 12 1 1.0 (0.75) 0.35 12 0.15 0.9 0.95 3.3 3.9 max (3.25) 0.51min (0.71) 1.78 0.48 SANYO : DIP24S(300mil) SANYO : MFP24S(300mil) 0.1 1.7max (1.5) No.7930A-3/11 0.63 LA1844,LA1844M Block Diagram No.7930A-4/11 LA1844,LA1844M Test Circuit No.7930A-5/11 LA1844,LA1844M Pin Functions Pin No. 1 Function FM IF input Pin voltage (V) Vreg Equivalent circuit Notes Input impedance Ri = 330Ω 2 AM mixer output VCC Connect the mixer coil between this pin and VCC 3 REG 2.1 Vreg = 2.4V 4 AM IF input Vreg Input impedance Ri = 2kΩ 5 6 7 GND Tu-LED ST-LED / AM-IF output 0 VCC Active low Open collector 8 9 10 FM detector VCC AM / FM IF counter output, output control switch, mute switch VCC 5.0 0 The 600BEAS-10471 (Toko Mfg. Co., Ltd.) is recommended for detector coil. V10 ≤ 0.5V : Reception state (Normal) 1.4V ≤ V10 ≤ 2.2V : Muting on (Mute) V10 ≥ 3.5V : IF counter output and muting on (Seek) 11 Phase comparator low-pass filter (AM/FM switching) VCC-1.0 The device operates in AM mode when a current of over 200μA flows from pin 12. Continued on next page. No.7930A-6/11 LA1844,LA1844M Continued from preceding page. Pin No. 12 Function Pilot detector low-pass filter (Forced mono) (VCO stop) Pin voltage (V) VCC-1.0 Equivalent circuit Notes The device is forced to monaural when a current of over 50μA flows from this pin. The VCO is stopped when a current of over 200μA flows from this pin. 13 14 L outputs R outputs 3.2 Output impedance RO = 3.3kΩ 15 Pilot canceler output Vreg 16 Decoder input Vreg Inverting input pin RNF = 20kΩ 17 PLL input Vreg Input impedance Ri = 20kΩ 18 FM demodulator output Vreg+0.7 Output impedance RO = 2.3kΩ The channel separation can be adjusted with an external capacitor connected between this pin and ground. 19 AM detector output 0 (FM) 1.5 (AM) Output impedance RO = 3.3kΩ 20 S meter, AM AGC 0.2 (FM) 0.9 (AM) The resistance of the built-in resistor R is 13.9kΩ The SD responce during seek operation is determined with the external capacitor connected to this pin. Continued on next page. No.7930A-7/11 LA1844,LA1844M Continued from preceding page. Pin No. 21 Function AM RF input Pin voltage (V) Vreg Equivalent circuit Notes Must be used at the same potential as pin 22 22 AFC Vreg The FM SD bandwidth can be adjusted with the external resistor connected between this pin and pin 3 (REG) 23 OSC VCC Connect the oscillator coil between this pin and pin 9 (VCC) Note: Impedance of the secondary oscillator coil must be 5kΩ or higher. 24 Oscillator buffer output, FM SD sensitivity adjustment VCC-1.4 The FM SD sensitivity can be adjusted with an external resistor connected to this pin. Output impedance RO = 200Ω Note: Resistance of the external resistor connected to the pin 24 must be 3.3kΩ or higher. No.7930A-8/11 LA1844,LA1844M No.7930A-9/11 LA1844,LA1844M No.7930A-10/11 LA1844,LA1844M 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 June, 2006. Specifications and information herein are subject to change without notice. PS No.7930A-11/11