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| Ordering number : EN1820C Monolithic Linear IC LA1265 FM/AM Tuner of Electronic Tuning Type Functions Package Dimensions FM : IF amplifier, quadrature detector, AF preamplifier, unit : mm signal meter, tuning indicator drive output (common 3059-DIP22S with stop signal, muting drive output). AM : RF amplifier, MIX, OSC (with ALC), IF amplifier, detector, AGC, signal meter, tuning indicator drive output (common with stop signal). [LA1265] Features * Minimum number of external parts required. * Excellent S/N. * Local OSC with ALC. * Local OSC buffer. * Tuning indicator pin (common with narrow-band stop signal and muting drive output). * Variable stop sensitivity (variable separately for FM, AM) * Low whistle. * Signal meter pin. SANYO : DIP22S Specifications Maximum Ratings at Ta=25C, See specified Test Circuit. Parameter Maximum supply voltage Flow-in current Flow-out current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max I8 I20 I22 Pd max Topr Tstg Pin 8 Pin 20 Pin 22 Ta60C Conditions Pins 7, 8, 17 Ratings 16 20 1 2 650 -20 to +70 -40 to +125 Unit V mA mA mA mW C C Operating Conditions at Ta=25C Parameter Operating voltage range Symbol VCC op Conditions Ratings 8.5 6 to 14 Unit V V Recommended operating voltage VCC SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN N2897HA (KT)/40194HK/O077KI/D095KI/2255KI, TS No.1820-1/15 LA1265 Operating Characteristics at Ta=25C, VCC=8.5V, See specified Test Circuit Parameter [AM : f=1MHz] Quiescent current Detection output S/N Total harmonic distortion Signal meter output LED lighting sensitivity Local OSC buffer output [FM : f=10.7MHz] Quiescent current Input limiting sensitivity Demodulation output S/N Total harmonic distortion Signal meter output LED lighting sensitivity LED lighting bandwidth AM rejection ratio Icco -3dBL.S. VO S/N THD VSM 1 VSM 2 LED-on LED-BW AMR No input 3dB down, 400Hz, 100% mod. VIN=10dB, 400Hz, 100% mod. VIN=100dB VIN=100%dB, 400Hz, 100% mod. No input VIN=100dB ILED=1mA VIN=100dB, ILED=1mA VIN=100dB, FM=400Hz 100% mod. AM=1kHz 30% mod. 0 1.5 35 90 45 240 78 20 31 330 84 0.03 0 2.7 50 120 60 0.3 0.2 3.1 65 160 28 37 460 mA dB mV dB % V V dB kHz dB Icco VO1 VO2 S/N1 S/N2 THD1 THD2 VSM 1 VSM 2 VLED on VOSC No input VIN=20dB, 400Hz, 30% mod. VIN=80dB, 400Hz, 30% mod. VIN=20dB VIN=80dB VIN=80dB, 400Hz, 30% mod. VIN=107dB, 400Hz, 30% mod. No input VIN=80dB ILED=1mA fOSC=1.45MHz 0 2.4 15 220 30 110 16 49 18 50 160 20 54 0.3 0.5 0 2.8 24 275 1.0 2.0 0.2 3.1 33 330 26 90 220 mA mV mV dB dB % % V V dB mV Symbol Conditions min Ratings typ max Unit Allowable power dissipation, Pd max - mW Ambient temperature, Ta - C No.1820-2/15 LA1265 Equivalent Circuit Block Diagram S Carve S meter How to use the LA1265 LED Lighting Bandwidth - Resistance across pins 9 and 20 1. LED lighting, muting drive output, stop signal (SD). * For LED lighting, muting drive output, stop signal, the output at pin 8 is used. * The voltage on pin 8, when tuned, turns from "H" to "L". (Active-Low) * Signal bandwidth at pin 8. - For AM, the bandwidth depends on the CF (BFU450CN) at pin 11. If a capacitor is connected in place of the CF, the bandwidth will get wider. - For FM, the bandwidth depends on the resistance across pins 9 and 20. If the resistance is increased, the bandwidth will get narrower. R=15k makes the bandwidth approximately Resistance across pins 9 and 20 - k 120kHz. * Sensitivity adjustment of LED, muting, stop signal. - For FM, the semifixed variable resistor across pin 13 and GND is used. - For AM, the semifixed variable resistor across pins 13 and 14 is used. Be sure to start adjustment for FM, and then make adjustment for AM. For the stop signal sensitivity and FM stop signal bandwidth, the variations should be considered and it is recommended to use the semifixed variable resistor for adjustment. * LED lighting sensitivity setting for AM. For the LED lighting sensitivity setting for AM, it is desirable that the IC input be 30dB (antenna input : approximately 50dB/m). In this case, the value of VR1 is 30k. LED lighting bandwidth - kHz No.1820-3/15 LA1265 * LED lighting sensitivity setting for FM. Semifixed Variable Resistor for FM - For the LED lighting sensitivity setting for FM, the IC LED lighting sensitivity setting for FM input may be 45dB to 60dB. With the variations in the front end considered, it is ideal that the IC input in a standard receiving set be 51dB to 54dB. The lower Ideal setting range value of VR2 for the LED lighting sensitivity setting is as illustrated right. Since the variations in the front end cause the IC input setting sensitivity to vary, it is recommended to use a value of VR2 at an input voltage lower than a standard setting by 6dB or greater. For example, if IC input 53dB is taken as a standard, use VR2100k at IC input 47dB. 2. AM/FM changeover IC input - dB * Two selections are available for changeover as shown below : (A) pin 17-used method and (B) pin 18-used method. * For (A), the voltage on pin 17 relative to VCC (pin 7) must be within the range of -0.8V to +0.1V. If not within this range, distortion and selectivity will get worse. * For (A), a resistance of 68k at the IFT cold terminal, which is used to prevent the changeover circuit from malfunctioning, must be connected. (A) pin 17-use method for AM/FM changeover (B) Pin 18-used method for AM/FM changeover VR2 semifixed variable resistor value - k 3. Local OSC buffer output * When local OSC buffer output wave form is saw-toothed at the SW mode, connect a resistance of 1.2k or thereabouts across pin 22 and GND. 4. AM input pin * It is desirable that the AM input pin (pin 19) be L-coupled to pin 18. * Inputting to pin 19 can be done by DC-cutting with a capacitor. However, an unbalance in the RF amplifier (differential amplifier) causes gain drop and whistle worsening. V9 - Modulation Frequency 5. Capacitance across pin 9 and GND. A large capacitance across pin 9 and GND may cause a misstop at an adjacent channel when the channel select speed is made faster at the automatic channel select mode. In this case, decrease the capacitance across pin 9 and GND. However, if too decreased, the LED will flutter at low modulation frequencies at the time of detuning. Therefore, it is recommended to fix the capacitance across pin 9 and GND to be 3.3F to 10F. The relation between modulation frequency and demodulation output voltage on pin 9 with the capacitance across pin 9 and GND as a parameter is shown right. Modulation frequency - Hz No.1820-4/15 LA1265 6. If the coupling coefficient of the local OSC coil is small and an antiresonance point of approximately 100MHz is present or the stray capacitance across pins 22 and 21 is large, a parasitic oscillation of approximately 100MHz may occur in the buffer output (pin 22). In this case, connect a capacitance of approximately 30pF across pin 22 and GND. 7. AM OSC coil Generally speaking, the following should be noted. Avoid winding with loose coupling between primary side and secondary side (especially SW1, SW2). To put it concretely, the pot core type is better than the screw core type which is loose in coupling. This prevents the local OSC frequency from turning third resonance frequency related to the coupling coefficient. 8. Resistance across pin 8 and VDD. If pin 8 is used for the stop signal (SD) only, without using LED, it is recommended to fix resistance RL across pin 8 and GND to be 51k to 100k. 9. To prevent whistle from worsening, make the pattern of AM output pin 12 as short as possible. Input/Output Admittance FM - IF Parameter Frequency i1 10.7MHz - ri ci Admittance 330 20 Unit pF AM - RF MIX IF Parameter Frequency i19 o17 i15 1MHz 500kHz 500kHz - ri ci ro co ri co Admittance AGC-off (V16=1.4V) AGC-on (V16=2.5V) 15 16 4 4 - - 3 3 2 2 10 8 Unit k pF k pF k pF Test Circuit : FM, AM-MW Unit (resistance : , capacitance : F) T1 4147-1457-177 (Sumida) T2 HW-40174 (Mitsumi) T3a HW-40130, T3b HW-40131 (Mitsumi) No.1820-5/15 LA1265 FM Input/Output Characteristics Detection output, Noise voltage - dBm Total harmonic distortion, THD - % AM ou tpu t Noise voltage IF input voltage - dB FM Signal Meter Current Characteristic Non-modulation See test circuit. IF input voltage - dB FM Signal Meter Voltage Characteristic Non-modulation See test circuit. Signal meter current, ISM - mA IF input voltage - dB MW Input/Output Characteristics Noise voltage, Detection output - dBm Total harmonic distortion, THD - % Signal meter current, ISM - mA Signal meter voltage, VSM - V IF input voltage - dB AM Signal Meter Current Characteristic Non-modulation See test circuit. ise ge No olta v reception Mod. Antenna input voltage - dBm AM Signal Meter Voltage Characteristic Non-modulation See test circuit. Antenna input voltage - dBm MW Fidelity Characteristics Attenuation reception input Total harmonic distortion, THD - % Signal meter voltage, VSM - V Attenuation - dB Distortion Modulation frequency - Hz Antenna input voltage - dBm No.1820-6/15 LA1265 MW Reception Characteristic Sensitivity - dB/m Interference - dB Tracking adjust at each frequency IF interference Selectivity Characteristic Output 25mV const. Usable sensitivity (400Hz-30% mod., S/N=20dB) Max. s ensitiv ity (400Hz-30% mod., detection output 20mV) Receiving frequency, fr - kHz MW Detuning Characteristic Frequency deviation, f - kHz Spurious Characteristic Reception : 1kHz Detection output - dBm Response - dB Frequency deviation, f - Hz Frequency, f - Hz Local OSC buffer output, VOSC - mV Supply voltage, VCC - V FM Current Drain Characteristic ICC (including no LED current) Local OSC buffer output, VOSC - mV Receiving frequency, fr - kHz AM Current Drain Characteristic Current drain, ICC - mA Current drain, ICC - mA (including no LED current) IF input voltage - dB Antenna input voltage - dBm Attenuation - dB e en ag fer Im ter in ce No.1820-7/15 LA1265 Detection output - dBm Noise voltage, VN - dBm FM Temperature Characteristics Detection output Input Total harmonic distortion, THD - % Bandwidth, LED-BW - kHz Noise voltage, VN - dBm Detection output - dBm Total harmonic Sensitivity - dB distortion,THD - % AM Temperature Characteristics input input input input S meter voltage, VSM - V input Detection output input input input no input input LED lighting sensitivity Sensitivity - dB no input LED lighting sensitivity S/N=20dB sensitivity 400Hz-100% mod. Output 20mV sensitivity -3dB limiting sensitivity input Ambient temperature, Ta - C FM VCC Characteristics Detection output (Input=100dB) Curren ,I C t drain C nal No sig Ambient temperature, Ta - C -3dB limiting sensitivity Current drain, ICC - mA Detection output - dBm Sensitivity - dB LED lighting sensit ivity S meter voltage Input Input Supply voltage, VCC - V S meter voltage, VSM - V Input No.1820-8/15 S meter voltage, VSM - V LA1265 AM VCC Characteristics in, I CC Curre nt dra No sig nal Detection output (Input=100dB) Sensitivity - dBm Output 20V sensitivity LED lighting sensitivity S meter voltage Input Input Test Circuit : SW2 Dummy Supply voltage, VCC - V T0 : YT-30177 (Mitsumi) T1 : HW-40184 (Mitsumi) T2 : HW-40174 (Mitsumi) T3a : HW-40130, T3b : HW-40131 (Mitsumi) Variable capacitor PVC 22KTL (Mitsumi) Unit (resistance : , capacitance : F) No.1820-9/15 S meter voltage, VSM - V Input Current drain, ICC - mA Detection output - dB LA1265 SW2 Input/Output Characteristics Noise voltage, Detection output - dBm Noise voltage, Detection output - dBm Total harmonic distortion, THD - % SW2 Input/Output Characteristics Total harmonic distortion, THD - % Image frequency Receiving frequency, fr - MHz Detection output N vo ois lta e ge Detection ou tput N vo oise lta ge Detection output IEC input voltage - dB SW2 Input/Output Characteristics IEC input voltage - dB 8.5MHz Spurious Characteristics Referenced to output -20dBm Total harmonic distortion, THD - % Noise voltage, Detection output - dBm Detection output Spurious - dB Receiving frequency N vo ois lta e ge IEC input voltage - dB Frequency, f - Hz 8.5 to 9.4MHz Spurious Characteristics Image interference - dB Sensitivity - dB Image frequency Referenced to output -20dBm y sen Imag sitiv e ity ivity n sensit Max.t at detectio u Inp ut 20mV outp Receiving frequency, fr - MHz Receiving frequency Spurious - dB Usab sensitle ivit No.1820-10/15 LA1265 Coil Specifications MW antenna Bar antenna (for PVC22KTL) * TN-10896 (Mitsumi) Tight solenoid direct winding 17T 0.5 space winding 4T tight solenoid winding Loop antenna (for SVC321) * LA300 (Korin Giken) Loop antenna matching coil * KT-412 MW OSC * 4147-1457-177 (Sumida) For PVC22KTL * KO-387 (Korin Giken) For SVC321 AM-IFT Matching coil for SFU450B (1-element type) (Mitsumi) (Sumida) Internal 180pF Internal 180pF Matching coil for SFZ450B (2-element type) (Mitsumi) (Sumida) Internal 180pF Internal 180pF FM single tuning detection coil (Mitsumi) (Sumida) Internal 82pF10% Damping resistance Internal 82pF10% Damping resistance No.1820-11/15 LA1265 FM double tuning detection coil (Mitsumi) (Mitsumi) Internal 100pF10% Internal 100pF10% (Sumida) (Sumida) Internal 62pF10% Internal 82pF10% Unit (resistance : ) No.1820-12/15 LA1265 Sample Application Circuit : LA1186N + LA1265 (US Band) B.P. F SNY-2101 (Sumida) VD1, VD2=SVC201 VD3, VD4=SVC321 TC1=20pF TC2=20pF CF1, CF2=SFE10.7MA CF3=SFZ450B (Murata) CF4=BFU450CN (Murata) L1 : YT-30196 (Mitsumi), 0708-700 (Sumida) L2 : HW50433 (Mitsumi), 0267-034 (Sumida) T1 : YT-30224 (Mitsumi) T2 : KL412 (Korin) BL-70 T3 : KO387 (Korin) T4 : HW-40174 (Mitsumi), 2150-2061-049 (Sumida) T5a : HW-40130 (Mitsumi), 2231-096 (Sumida) T5b : HW-40130 (Mitsumi), 2231-096 (Sumida) No.1820-13/15 Unit (resistance : , capacitance : F) LA1265 Sample Printed Circuit Pattern (Cu-foiled area) Noise voltage, AM output, Detection output - dBm LA1186+LA1265 Overall Characteristics Detection output (75k dev) Total harmonic distortion, THD - % Signal meter - V Signal meter ut AM outp Noise voltage Input - dB Noise voltage, AM output, Detection output - dBm LA1186+LA1265 Overall Characteristics Total harmonic distortion, THD - % Signal meter - V Detecti on outp ut Signal meter Input - dB/m No ise vo lta ge No.1820-14/15 LA1265 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.1820-15/15 |
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