Ordering number : EN1506D Monolithic Linear IC LA1260 FM/AM Tuner System for Radio-Casette Recorders, Music Centers Functions Package Dimensions FM : IF amplifier, quadrature detector, AF preamplifier, unit : mm tuning indicator drive output. 3006B-DIP16 AM : RF amplifier, MIX, OSC (with ALC), IF amplifier, Detector, AGC, tuning indicator drive. [LA1260] Features • Minimum number of external parts required (No AM detection coil required). • High S/N : FM 81dB AM 53dB • Low-level AM oscillator with ALC : Pin 16 OSC output MW 130mV SW 70 mV to 90 mV (7MHz) (24MHz) SANYO : DIP16 • Less AM whistle interference : Whistle 1% at input 100dB/m. • On-chip LED tuning indicator driver. • On-chip FM/AM selector. • Independent FM/AM output pins : Possible to set FM/AM frequency characteristic independently. Specifications Maximum Ratings at Ta=25°C, See specified Test Circuit. Parameter Symbol Conditions Ratings Pins 6, 12 Unit Maximum supply voltage VCC max 9 V Maximum current drain ICC max Pins 6+7+12 50 mA Flow-in current I7 Pin 7 20 mA Flow-out current I15 Pin 15 0.1 mA Allowable power dissipation Pd max Ta≤70°C 450 mW Operating temperature Topr –20 to +70 °C Storage temperature Tstg –40 to +125 °C Operating Conditions at Ta=25°C Parameter Symbol Recommended operating voltage VCC Operating voltage range VCC op Conditions Ratings Unit 4.5 V 3.0 to 8.0 V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN N2897HA (KT)/33194HO/O067KI/8225MW/4045KI/8084KI, TS No.1506-1/14 LA1260 Operating Characteristics at Ta=25°C, VCC=4.5V, See specified Test Circuit Parameter Symbol Conditions Ratings min Unit typ max 7.5 10.5 mA –33 –28 –23 dBm 17.3 31 55 mV [AM Characteristics : f=1MHz] Quiescent current Icco AM VIN=No input Detection output VO1 VIN=23dBµ, 400Hz-30% mod. S/N ratio S/N1 VIN=23dBµ, 400Hz-30% mod. 18.0 21.5 Detection output VO2 VIN=60dBµ, 400Hz-30% mod. –19.0 –16.0 –13.0 dBm dB 87 122 174 mV S/N ratio S/N2 VIN=60dBµ, 400Hz-30% mod. 48 53 Total harmonic distortion THD1 VIN=60dBµ, 400Hz-30% mod. 0.45 1.3 % THD2 VIN=100dBµ, 400Hz-30% mod. 1.5 3.0 % LED lighting voltage VLEDAM IC=1mA Oscillation output (24MHz) VOSC24M dB 22 30 38 dBm 60 86 120 mV 8.5 12.0 mA [FM Characteristics : f=10.7MHz] Quiescent current IccoFM VIN=No input –3dB sensitivity VINlim –3dB down, 400Hz-100% mod. Demodulation output VO3 VIN=80dBµ, 400Hz-100% mod. S/N ratio S/N3 VIN=80dBµ, 400Hz-100% mod. S/N4 VIN=80dBµ, 400Hz-30% mod. Total harmonic distortion THD3 VIN=80dBµ, 400Hz-100% mod. 0.55 THD4 VIN=80dBµ, 400Hz-30% mod. 0.05 LED lighting voltage VLEDFM IL=1mA 39 AM rejection ratio AMR VIN=80dBµ, 400Hz-100% FM mod. 60 35 42 dBµ –12.5 –9.5 –6.5 dBm 183 260 367 mV 77 81 dB 71 dB 1.2 % 49 dBµ % dB 1kHz-30% AM mod. Equivalent Circuit Block Diagram No.1506-2/14 LA1260 Test Circuit Unit (resistance : Ω, capacitance : F) T1 Mitsumi YT30194 (56pF tuning) T2 Mitsumi KW30011 T3 Mitsumi YT30105 T4 Mitsumi YT30112 Proper Cares in Using the IC External parts placement and pattern • The AM local oscillation parts, AM local oscillation coil, and antenna circuit parts such as bar antenna must be separated from each other as far as possible to prevent Qs from worsening. • Pin 16 (AM oscillation injection pin) and pin 14 (RF input pin) must be separated from each other on the pattern as shown in Figure. A below. Care should be taken not to make unwanted coupling by parallel wiring as shown in Figure B to prevent Qs from worsening. Figure A Good example Figure B Bad example FM quadrature detection coil • The values recommended for the detection coil are shown below. (See Figure 1.) Tuning capacitance : 56pF Damping resistance : 6.8kΩ • Values other than recommended provide the LED drive characteristic as shown below. Tuning capacitance Damping resistance Value increased Value decreased • Lighting is delayed. • No lighting may occur at low temperature. • Lighting is advanced. • Mislighting may occur in the absence of signal. • Lighting is advanced. • Mislighting may occur in the absence of signal. • Lighting is delayed. • No lighting may occur at low temperature. If the product of tuning capacitance and damping resistance is equal to that of values recommended above (e. g. tuning capacitance=82pF, damping resistance=4.7kΩ), other characteristics (demodulation output, S/N, THD, etc.) than the LED drive characteristic remain almost unaffected. • For applications where a double tuning coil is used, refer to "Applications where a double coil is used" on page 13. No.1506-3/14 LA1260 How to apply FM AFC The S curve at the FM output pin (pin 8) is as shown in Figure 1. Therefore, the domestic (Japan) band (lower local oscillation) use and foreign band (upper local oscillation) use differ as shown in Figures 2 and 3. Figure 1 Figure 2 Domestic (lower local oscillation) band Figure 3 Foreign (upper local oscillation) band Unit (resistance : Ω, capacitance : F) AM local oscillation Since the LA1260 contains an ALC circuit, the oscillation level at pin 16 can be limited to 60 to 150mV in the following applications where a coil is used. Unit (capacitance : F) Stable oscillation occurs at a coil impedance of 5kΩ or greater viewed from across pins 16 and 15. Turn ratio n and QO must be determined so that the oscillation level at pin 16 becomes 75mV or greater for MW use and 60mV or greater for SW use. If turn ratio n is increased more than needed, the oscillation level at pin 16 drops, thereby lowering the maximum sensitivity as shown in Figure 5 and 6. Figure 7 shows the relation between turn ratio n and oscillation level at pin 16 in the MW band. Unit (capacitance : F) Figure 4 Maximum sensitivity (input at detection output –30dBm) Usable sensitivity (S/N=20dB) OSC injection voltage at pin 16 – mV Figure 6 fr=1000kHz reception Maximum sensitivity, VS Usable sensitivity, QS – dB/m Maximum sensitivity, VS Usable sensitivity, QS – dB/m Figure 5 21MHz reception mode Usable sensitivity (S/N=20dB) Maximum sensitivity (input at detection output –30dBm) OSC injection voltage at pin 16 – mV No.1506-4/14 LA1260 Figure 7 V16 OSC voltage Receiving frequency, fr – Hz V16 OSC voltage – mV Relation between turn ration n and OSC level OSC voltage at coil end OSC voltage at coil end, VOSC – mV MW OSC characteristic AM oscillation coil Generally speaking, the following should be noted. Winding with loose coupling between 1 and 2 and between 1 and 3 must be avoided. (Particularly SW1, SW2). To put in concretely, the pot core type is better than the screw core type which is loose in coupling. This prevents the local oscillation frequency from turning third resonance frequency related to the coupling coefficient. Unit (capacitance : F) LED unlighted time and distortion in AM (MW) By increasing the value of the electrolytic capacitor for AGC at pin 11 (Figure 8), the distortion in the AM mode can be improved, but the LED unlighted time is made longer. 10µF is recommended for obtaining the optimum LED unlighted time and distortion. The LED unlighted time is 200ms at this value (Approximately 400ms at 22µF). FM-AM selection and dc level at pin 12 (1) Pin 12-used method=recommended circuit The FM mode is entered with pin 12 open. When pin 12 and pin 6 are at the same potential in terms of DC, the AM circuit is turned on by the internal switch. It should be noted that the dynamic range is narrowed whether the potential at pin 12 is lower or high than that at pin 6. (2) Pin 13-used method The AM mode is entered with pin 13 open. When pin 13 is grounded, the FM circuit is turned on and the AM circuit is turned off by the internal switch. In this case, pin 12 and pin 6 (VCC) are at the same potential. Total harmonic distortion, THD – % Figure 8 Input 100dBm VCC=4.5V AM mod. char. and electrolytic capacitor at pin 11. : nd µF 10 dG ss or cit z, a cap o acr 1 n1 an pi 0H 10 Unit (capacitance : F) Modulation degree – % No.1506-5/14 LA1260 FM IF/MW Test Circuit L1 TN10896 (Mitsumi) T1 YT-30194 (Mitsumi), 2153-4095-239 (Sumida) T2 KW-30011 (Mitsumi) T3 YT-30105 (Mitsumi) Unit (resistance : Ω, capacitance : F) N vo oise lta ge Current drain, ICC – mA ut on outp Detecti Voltage at pin 11 – V MW input char. 1MHz reception Total harmonic distortion, THD – % Noise voltage, VN detection output, VO – dBm [FM Characteristics] Current drain Voltage at pin 11 LED lighted Antenna input voltage, VIN – dB/m Antenna input voltage, VIN – dB/m Sensitivity char. f=1MHz Output 25mV const Attenuation – dB Input 30% mod. Distortion Modulation frequency – Hz Attenuation – dB Attenuation Total harmonic distortion, THD – % MW fidelity char. Frequency, ∆ – kHz No.1506-6/14 LA1260 Sensitivity dB/m Interference – dB Detection output – dBm MW detuning char. MW receiving char. Tracking adjust at each freq. IF interference Usable sensitivity Max. sensitivity detection output 20mV) Frequency, ∆f – Hz Whistle output – dBm Receiving frequency, ∆f – kHz OSC voltage – mVrms OSC coil end Input 100dB/m IC injection end V16 Receiving frequency, ∆f – kHz Frequency, ∆f – kHz Reception : 1MHz MW char. [FM Characteristics] Response – dB Detection output, Whistle output – dBm Detection output (400Hz-30% mod.) Whistle max Input voltage – dB/m Frequency, f – Hz Detection output, Noise output – dBm 400Hz-75kHz dev AM output Noise voltage IF input voltage – dBµ Total harmonic distortion, THD – % Detection output IF input voltage – dBµ No.1506-7/14 LA1260 Detection output Sensitivity output 20mV LED light sensitivity Voltage at pin 11 – V Current drain, ICC – mA Detection output – dB ICC (including no LED current) Sensitivity – dB/m Current drain, ICC – mA Voltage at pin 11, V11 – V ICC no input quiescent LED lighted IF input voltage – dBµ Supply voltage, VCC – V Current drain, ICC – mA Detection output – dBm OSC voltage, VOSC – mV Sensitivity – V OSC frequency, ∆fOSC – kHz Injection voltage V16 Current drain, ICC Quiescent –3dB limiting sensitivity LED lighted sensitivity Input=80dBµ Input=45dBµ Voltage at pin 11 Voltage at pin 11, V11 – V Detection output OSC frequency (20MHz) No input Total harmonic distortion, THD – % Supply voltage, VCC – V Injection voltage V16 OSC frequency OSC voltage Sensitivity – dBµ OSC frequency, ∆fOSC – kHz Supply voltage, VCC – V OSC voltage at pin 16, VOSC – mV OSC voltage, Voltage at pin 16 – mV Noise voltage, VN – dBm Detection output – dBm Current drain, ICC – mA OSC frequency, ∆fOSC – kHz OSC frequency (20MHz) Ambient temperature, Ta – °C Input 60dBµ THD input 100dBµ ICC no input THD input Input Detection output V11 input 60dBµ V11 quiescent LED lighted sensitivity Voltage at pin 11, 11V – V Supply voltage, VCC – V S/N 20mV sensitivity Output 20mV sensitivity Ambient temperature, Ta – °C No.1506-8/14 FM output voltage, V8 – V Voltage at pin 15 : Vref, V15 – V Ambient temperature, Ta – °C Voltage at pin 15 Output voltage V18 Quiescent THD min, Detection output Noise voltage Distortion Current drain,ICC – mA OSC voltage OSC voltage at pin 16 VOSC(V16) – mV Voltage at Distortion, Noise voltage – dBm Detection output pin 11, V11 – V – dBm THD – % OSC frequency Sensitivity – dBµ OSC frequency, ∆fOSC – kHz LA1260 µ 80dB rain d t n e Curr Quiescent Voltage pin 11 Quiescent LED lighted sensitivity –3dB limiting sensitivity Ambient temperature, Ta – °C Ambient temperature, Ta – °C Sample Application Circuit 1 : FM IF/SW2 (7.2 to 24.0MHz) T1 YT-30194 (Mitsumi), 2153-4095-339 (Sumida) T2 KW-30011 (Mitsumi) T6 YT-30112 (Mitsumi) T7 YT-30117 (Mitsumi), 2158-4140-044 (Sumida) Unit (resistance : Ω, capacitance : F) No.1506-9/14 SW2 input char. Usable sensitivity S/N=20dB Input at detection output –30dBm Max. sensitivity Detection output 30% mod. Detection output – dBm Image interference – dB Sensitivity – dBµ LA1260 Image interference Noise voltage Total harmonic distortion, THD – % Receiving frequency, fr – Hz Voltage at pin 16 Voltage at pin 11, V11 – V OSC voltage, VOSC – V SW OSC char. No tap Voltage at pin 11 LED lighted IEC input voltage – dBµ Detection output – dBm Detection output 30% mod. Noise voltage Total harmonic distortion, THD – % SW2 input char. Voltage at pin 11, V11 – V OSC voltage, VOSC – V Receiving frequency, fr – Hz n tio or st Di Voltage at pin 11 on rti LED lighted o ist D IEC input voltage – dBµ No.1506-10/14 LA1260 Frequency, f – MHz OSC frequency Spurious – dB 8.5MHz to 9.4MHz spurious response Output –30dBm (referenced to ANT input 24.5dBµ, 8.5MHz) Image frequency OSC frequency Spurious – dB 8.5MHz spurious response Output –39dBm (referenced to ANT input 24.5dBµ, 8.5MHz) Receiving frequency, fr – MHz ANT input voltage – dB/m Detection output AM mod. output Noise voltage Distortion Total harmonic distortion, THD – % LED lighted Detection output – dBm Total harmonic distortion, THD – % Dis ise ou t pu t tort ion 30% detection output No Detection output, Noise voltage – dBm SW input/output char. ANT input voltage – dBµ No.1506-11/14 T3 T4 T5 T6 T7 YT-30105 (Mitsumi) YT-30224 (Mitsumi) YT-30134 (Mitsumi) YT-30112 (Mitsumi) YT-30117 (Mitsumi) 2158-4140-044 (Sumida) Unit (resistance : Ω, capacitance : F) TN10896 bar antenna (Mitsumi) 5.5mmφ air core 0.88mm wire 4T RF 5.5mmφ air core 0.88mm wire 3T OSC YT-30194 (Mitsumi), 2153-4095-339 (Sumida) T2 KW-30011 (AM Mix) L1 T2 L3 T1 LA1260 Sample Application Circuit 2 : FM (band in US) /MW/SW1 (2.2 to 7.5MHz) /SW2 (7.2 to 24.0MHz) Application where the LA1185 and LA1260 are used [Circuit Diagram] (The sample printed circuit pattern is shown on page 13.) T4 : YT-30224 (Mitsumi) FM IF Internal 100pF, external 5pF No.1506-12/14 LA1260 Sample Printed Circuit Pattern : Cu-foiled area (The circuit diagram is shown on page 12.) Detection output AM output Noise voltage Distortion Total harmonic distortion, THD – % Detection output, Noise voltage – dBm Unit (resistance : Ω, capacitance : F) LED lighting sensitivity 11.5dBµ ANT input voltage – dBµ • Applications where a double tuning coil is used (See page 3.) The use of the following coil improves the distortion approximately 0.1% at 100% modulation. (Korin Giken) (Korin Giken) (Mitsumi) (Mitsumi) No.1506-13/14 LA1260 No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property lose. Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibilty for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. 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 November, 1997. Specifications and information herein are subject to change without notice. No.1506-14/14