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LA1838

LA1838

  • 厂商:

    SANYO(三洋)

  • 封装:

  • 描述:

    LA1838 - Single-Chip Home Stereo IC with Electronic Tuning Support - Sanyo Semicon Device

  • 数据手册
  • 价格&库存
LA1838 数据手册
Ordering number : EN5888 Monolithic linear IC LA1838 Single-Chip Home Stereo IC with Electronic Tuning Support Overview The LA1838 is designed for use in home stereo systems and is a single-chip tuner IC that provides electronic tuning functions for AM, FM IF, and MPX reception. It is optimal for use in products that adopt an automatic tuning system based on an IF count. Features • Integrated MPX VCO (External components are no longer required.) • Built-in adjacent channel interference rejection function (third and fifth order) • Adjustment-free FM detector circuit (Uses a ceramic discriminator.) • The AM and FM SD sensitivities can be set independently. • The AM and FM output levels can be set independently. • Improved useable AM sensitivity and strong field distortion characteristics. Functions • AM: RF amplifier, mixer, oscillator, IF amplifier, detector, AGC, oscillator buffer, S-meter, narrow-band SD, IF buffer • 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, post amplifier, audio muting, adjacent channel interference rejection function Allowable power dissipation, Pdmax — mW 600 550 500 Package Dimensions unit: mm 3061-DIP30S [LA1838] 30 16 Pd max - Ta 10.16 8.6 400 1 27.2 15 1.15 1.78 0.48 0.95 100 SANYO: DIP30S 0 -40 -20 0 20 40 60 80 100 Ambient temperature, Ta —°C Any and all SANYO 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 representative nearest you before using any SANYO products described or contained herein in such applications. SANYO 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 products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 40999RM (OT) No. 5888-1/9 3.2 200 0.51min 4.25 300 4.95max 0.25 LA1838 Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta ≤ 70°C Conditions Ratings 12 550 –20 to +70 –40 to +125 Unit V mW °C °C Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCCop Conditions Ratings 9 7 to 11 Unit V V Operating Characteristics at Ta = 25°C, VCC = 9 V, in the specified test circuit. Parameter Symbol Conditions Ratings min typ max Unit [FM Mono Characteristics] fc = 10.7 MHz, fm = 1 kHz Current drain Demodulator output Channel balance Total harmonic distortion (mono) Signal-to-noise ratio AM rejection ratio Input limiting voltage LED indicator on sensitivity LED indicator on bandwidth IF counter buffer output S-meter output Mute attenuation ICCO-FM VOFM With no input signal 100 dBµ, 100% modulation, the pin 16 output 18 730 –1.5 31 1100 0 0.3 70 40 26 47 100 dBµ 100 dBµ, the pin 13 output 0 dBµ, the pin 11 output 100 dBµ, the pin 11 output 100 dBµ, 100% modulation, the pin 16 output 130 80 0 3.6 75 77 55 32 57 210 120 0.1 4.3 85 38 67 300 160 0.5 5.0 44 1460 +1.5 1.5 mA mVrms dB % dB dB dBµ dBµ kHz mVrms V V dB 100 dBµ, 100% modulation, the pin 16 output/the C.B-mono pin 17 output THDFM S/NFM AMR –3dBL.S SDOn-FM SDBW VIFBuff-FM VSM-FM1 VSM-FM2 Mute-Att 100 dBµ, 100% modulation, the pin 16 output 100 dBµ, 100% modulation, the pin 16 output 100 dBµ, AM 30% modulation, the pin 16 output 100 dBµ, 100% modulation, referenced to the output, the input when the output is down by –3 dB [FM Stereo Characteristics] fc = 10.7 MHz, fm = 1 kHz, L + R = 90%, Pilot = 10%, 100 dBµ Separation (left) Separation (right) Stereo on level Stereo off level Total harmonic distortion (main) SepL SepR STON STOFF Left channel modulated. The pin 16 output/the pin 17 output Right channel modulated. The pin 17 output/the pin 16 output The pilot modulation such that V7 falls under 0.7 V The pilot modulation such that V7 rises to over 4.5 V 30 30 1.3 45 45 2.7 1.5 0.3 40 1.5 5 dB dB % % % dB THD-main Left + right modulation. The pin 16 output. Brej-3rd fs = 113 kHz, Vs = 90%, pilot = 10% The left - right modulation 1 kHz demodulated output with respect to the pin 16 output fs = 189 kHz, Vs = 90%, pilot = 10% The left - right modulation 1 kHz demodulated output with respect to the pin 16 output Adjacent channel rejection ratio Brej-5th [AM Characteristics] fc = 1000 kHz, fm = 1 kHz Current drain Detector output ICCO-AM VOAM1 VOAM2 S/NAM1 S/NAM2 THDAM1 THDAM2 SDOn-AM VOSC-AM VIFBuff-AM VSTIF-AM VSM-AM 40 dB With no input signal 23 dBµ, 30% modulation, the pin 16 output 80 dBµ, 30% modulation, the pin 16 output 23 dBµ, 30% modulation, the pin 16 output 80 dBµ, 30% modulation, the pin 16 output 80 dBµ, 30% modulation, the pin 16 output 80 dBµ, 80% modulation, the pin 16 output 15 100 200 18 49 25 180 320 22 55 0.4 1.0 35 360 500 mA mVrms mVrms dB dB Signal-to-noise ratio Total harmonic distortion LED indicator on sensitivity Local oscillator buffer output IF counter buffer output ST - IF output S-meter output 1.2 4.0 37 220 300 48 0.2 % % dBµ mVrms mVrms mVrms V 17 With no input signal, the pin 30 output 80 dBµ, 100% modulation, the pin 13 output 80 dBµ, 100% modulation, the pin 7 output 0 dBµ, 100% modulation 110 160 16 0 27 160 220 34 0 No. 5888-2/9 LA1838 Block Diagram OSC BUFF FM SD ADJ VT OSC FM SD BAND -W AM AGC L.P.F L.P.F + AM - STEREO L / R - INPUT L R + 30 29 28 REG 27 RF + + + + L- OUT R - OUT 26 25 24 23 22 21 20 19 18 17 16 ALC BUFF AM OSC AM MIX AM RF.AMP P-DET AGC AM I F DET DECODER ANTI- BIRDIE STEREO SW MUTE SD COMP AM S-METER FM AM/FM S-METER S CURVE I F-BUFF FM DET GND 1 2 AM IFT FM IN (10.7MHz) + 3 4 5 TU - LED 6 ST - LED 7 TUNING DRIVE STEREO DRIVE VCO 304kHz FF 38k FF π 19k∠2 FF 19k∠θ PILOT DET FM I F VCC 8 + AM - IF 9 10 AM NARROW SD 11 12 FM VSM AM VSM (SD-ADJ) + AM/FM IF-BUFF MUTE + + AM MONO VCC T00147 13 14 15 FM ST AC Test Circuit 50Ω AM - IN (1MHz) OSC BUFF (1.45MHz) 1000pF 39pF 20pF 0.047µF REG AFC 0.047µF 39mH 3kΩ 3.3µF 18kΩ 0.01µF 0.033µF 0.033µF 10µF + + L.P.F L.P.F 3.3kΩ 10µF + 3.3kΩ 10µF 17 L- OUT R - OUT 5.1kΩ 0.047µF 33µF + 28 + 26 22µF + 25 24 30 29 27 1000pF 23 T1 OSC 22 21 20 19 18 16 LA1838 1 FM IN (10.7MHz) 75Ω 300Ω T2 0.047µF 2 450kHz 68kΩ 0.047µF 47µF + 3 4 5 6 SD 1000pF 7 ST 68kΩ 0.047µF + 8 9 330Ω 10 51Ω 3kΩ IF - BUFF 0.047µF ( ) 0.047µF 11 FM 12 AM + 1µF 10kΩ 13 SEEK1000pF 14 15 FM 0.47µF AM STEREO 1µF VCC 9.0V T00148 10µF 5kΩ * 5kΩ MONO VSM VSM + 5kΩ AM - ST NORMAL CDA10.7MGI-C (For use as the DUT socket board) T1: HW-50425 T2: YD-1073-1 The CDA10.7MG74 must be used for actual production models. (Series resistance: 270 Ω) 1 µF VDD + + No. 5888-3/9 LA1838 Coil Specifications • AM oscillator (for the DUT) HW-50425 (Mitsumi) 3 2 1 6 A10633 • IFT YD-1073-1 (Mitsumi) 3 S 4 4 Ž- -‘ -x QO ≥ 80 2T 9T 86T 2 1 S 6 SFU450B A10634 -x -‘ -Ž 58T 7T 94T fO = 450 kHz QO = 110 A 180-pF capacitor is built in With an external SFU450B L = 270 µH YD-1073 Pin Functions Pin No. Pin function Pin voltage Notes Equivalent circuit 1 1 FM IF input Vreg Input impedance ri = 330 Ω 3 A10635 2 2 AM mixer output VCC Connect the mixer coil between this pin and VCC A10636 1 3 FM IF input bypass Vreg Also used for the MPX regulator filter 3 A10635 4 4 AM IF input Vreg Input impedance ri = 2 kΩ A10637 5 GND 0V Active low Open collector AM stereo IF output (pin 7) The influx current must be held under 150 µA. A10638 6 7 TU-LED 6 7 ST-LED, AF-IF output VCC VCC 8 VCC VCC 28 9 FM detector Vreg – 1.4 The CDA10.7 MG74 (Murata Mfg. Co., Ltd.) is recommended as the ceramic discriminator. A device with a series resistance of 270 Ω must be used. 9 A10639 Continued on next page. No. 5888-4/9 LA1838 Continued from preceding page. Pin No. Pin function Pin voltage Notes Recommended narrow band CF: BFU450 C4N (Murata Mfg. Co., Ltd.) 1.3 V When the narrow band SD function is not used, bypass this circuit with a 50 Ω resistor and a 0.047 µF capacitor in series. 10 Equivalent circuit 10 AM narrow band CF connection A10640 11 FM S-meter output 0V RL = 8 kΩ 11 A10641 12 AM S-meter output 0 V (AM) The AM SD sensitivity is adjusted with an external resistor connected between this pin and ground 12 28 A10642 AM/FM IF buffer output, 13 Output control switch (mute switch) 0V V13 ≤ 0.5 V: Reception state 1.4 V ≤ V13 ≤ 2.2 V: IF buffer output on V13 ≥ 3.5 V: IF buffer output and muting on A10643 13 14 Phase comparator low-pass filter (AM/FM switching) The device operates in AM mode when this pin is connected to ground through a resistor. VCC – 1.4 (FM) 0 V (AM) Limit values for the resistor: 2.7 kΩ (When VCC = 7 V) 3.9 kΩ (8 V), 5.1 kΩ (9 V) 6.2 kΩ (10 V), 7.5 kΩ (11 V) The device is forced to monaural when a current of over 50 µA flows from this pin. 14 A10644 15 Pilot detector lowpass filter (Forced mono) (VCO stop) VCC – 1.0 The VCO is stopped if this pin is connected to ground. The limit values for the resistor are the same as those for pin 14. Output impedance ro = 200 Ω Pin 16: Right output, pin 17: Left output 15 A10645 16 17 18 19 Post-amplifier inputs and outputs Vreg Vreg Inverting input pins Pin 18: Right input, pin 19: Left input RNF = 33 kΩ 18 19 16 17 A10646 20 21 MPS outputs 3.5 V 3.5 V Output impedance ro = 3.3 kΩ Pin 20: Right deemphasis Pin 21: Left deemphasis 20 21 A10647 Continued on next page. No. 5888-5/9 LA1838 Continued from preceding page. Pin No. Pin function Pin voltage Notes Equivalent circuit 22 22 MPX input 2.9 V Input impedance ri = 20 kΩ A10648 Output impedance ro = 3.0 kΩ 23 FM demodulator output 2.8 V (FM) 2.8 V (AM) The channel separation can be adjusted with an external capacitor connected between this pin and ground. The VO sub/VO main ratio is set to be about 0 dB. 23 A10649 Output impedance ro = 3.3 kΩ 24 AM detector output 0 V (FM) 0.5 V (AM) The AM frequency characteristics can be adjusted by modifying the time constant of the circuit connected between this pin and pin 22 and between this pin and ground. 24 A10650 25 AM AGC 0 V (FM) 0.5 V (AM) The resistance of the built-in resistor R is 11 kΩ 25 A10651 26 AFC Vreg The FM SD bandwidth can be adjusted with the external resistor connected between this pin and pin 28 26 A10652 27 AM RF input Vreg Must be used at the same potential as pin 28 27 A10653 28 28 REG Vreg Vreg = 3.6 V A10654 29 29 OSC Vreg Connect the oscillator coil between this pin and pin 28 A10655 30 Oscillator buffer output, FM SD sensitivity adjustment 1.6 V (FM) 1.3 V (AM) The FM SD sensitivity can be adjusted with an external resistor connected between this pin and ground. Output impedance ro = 200 Ω 30 A10656 No. 5888-6/9 LA1838 Overall FM Characteristics Out 10 0 -10 -20 5 FM THD and VSM Characteristics VSM Total harmonic distortion, THD — %, S-meter output, VSM — V 4 Output, — dBm -30 -40 -50 -60 -70 AMOut Noise 3 2 V =9V -80 f CC10.7 MHz c= fm = 1 kHz,75 kHzdev -90 AM = 30% mod -100 0 20 40 1 THD 0 0 10 20 30 40 50 60 70 80 90 100 110 120 60 80 100 120 Input, — dBµ 5.0 Input, — dBµ 10 7 5 3 2 1.0 7 5 3 2 0.1 7 5 3 2 23 5 7 0.1 23 5 7 1.0 2 3 5 7 10 23 ON O FM THD vs. Band Characteristics Total harmonic distortion, THD — % VCC = 9 V VIN = 100 dBµ fm = 1 kHz, 75 kHzdev Distortion vs. Frequency Characteristics SUB Total harmonic distortion, THD — % 4.0 2.0 1.0 0 10.60 10.62 10.64 10.66 10.68 10.70 10.72 10.74 10.76 10.78 10.80 0.01 0.01 Frequency, fc — MH 50 45 Frequency, freq — kHz IF = 10.7 MHz, 100 dBµ, 75 kHzdev -10 VS = 90% PILOT = 10% LA1836 -20 Referenced to the L-R demodulated output 0 Separation vs. Frequency Characteristics -R Sep Adjacent Channel Rejection Ratio Channel separation, Sep — dB 40 35 30 25 20 15 10 5 0 0.01 23 Sep -L Vobat — dB -30 -40 -50 -60 -70 -80 LA1838 5 7 0.1 23 5 7 1.0 23 5 7 10 2 -90 70 90 110 130 150 170 190 210 M AM 3.0 MAIN ST 230 30 Frequency, freq — kHz 6 4 70 Frequency, fs — kHz 90 80 Capture Range Characteristics CR+ SD Sensitivity Adjustment 12 Capture range — % SD on — dBµ 2 60 50 40 30 20 AM FM AM FM 0 -2 -4 CR-6 10 20 30 40 10 0 0 2 4 6 8 10 12 14 16 Pilot — mV Rsdadj — kΩ No. 5888-7/9 LA1838 SD Band Adjustment Characteristics Overall AM Characteristics Out 350 300 250 0 -10 -20 Output, — dBm SD BW — kHz -30 -40 -50 -60 -70 VCC = 9 V fc = 1 MHz fm = 1 kHz,30%mod -80 -20 0 20 40 Noise 200 150 100 50 0 0 2 4 6 8 10 12 14 16 18 20 60 80 100 120 140 Radj — kΩ 5.0 Input, — dBµ 0 -5 AM THD and VSM Characteristics AM Detector Output Frequency Characteristics (1) 24 Total harmonic distortion, THD — % S-meter output, VSM — V Output voltage, VO — dBV VCC = 9 V 4.5 fc = 1 MHz fm = 1 kHz, 30%mod 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 -20 0 20 THD = 30%mod 40 60 80 100 120 140 THD = 80%mod VSM R C 22 -10 -15 -20 -25 -30 -35 -40 0.01 C 5 7 0.1 =0 .04 C =0 C= 0. . 02 7 µ 01 µ 2 µ 23 23 5 7 1.0 23 5 7 10 2 Input, — dB 0 -5 Frequency, fm — kHz 1.0 AM Detector Output Frequency Characteristics (2) 24 Distortion vs. Ambient Temperature Characteristics Output voltage, VO — dBV R = 10 k -10 -15 -20 -25 -30 -35 -40 0.01 2 3 5 7 0.1 23 5 7 1.0 23 R = 33 k R = 18 k 22 0.01 µF Total harmonic distortion, THD — % R 7 5 3 THD sub THD Mono 2 THD st THD Main 5 7 10 2 0.1 -40 -20 0 20 40 60 80 100 Frequency, fm — kHz 90 80 Ambient temperature, Ta — °C Separation vs. Ambient Temperature Characteristics S/N Mono S/N Stereo Sep- R Channel separation, Sep — dB 70 60 50 40 30 20 10 0 -40 -20 0 Sep- L 20 40 60 80 100 Ambient temperature, Ta — °C No. 5888-8/9 LA1838 Specifications of any and all SANYO 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 Electric 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 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 Electric 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 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 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, 1999. Specifications and information herein are subject to change without notice. No. 5888-9/9
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