LA1845N

Ordering number : EN7185C Monolithic Linear IC LA1845N Overview For Home Stereo IC Single-Chip Tuner IC The LA1845N is designed for use in mini systems and is a single-chip tuner IC that provides electronic tuning functions using SD/IF-count technigue. 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. Functions • AM : • FM-IF : • MPX : RF amplifier, mixer, oscillator, IF amplifier, detector AGC, SD, oscillator buffer, IF buffer, stereo IF output, AGC time constant switch IF amplifier, quadrature detector, S-meter, SD (signal detection), S-curve detection, IF buffer output PLL stereo decoder, stereo display, forced monaural, VCO stop, audio muting, adjacent channel interference rejection function, pilot canceler 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 = 80°C Conditions Ratings 9 400 -20 to +80 -40 to +125 Unit V mW °C °C Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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. 70109 SY PC/O2703SI (OT) /91002RM (OT) No.7185-1/9 LA1845N Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Ta = 80°C Conditions Ratings 8 4.3 to 8.5 Unit V V Electrical Characteristics at Ta = 25°C, VCC = 8V, in the specified test circuit. Parameter Symbol Conditions min FM mono characteristics fc = 10.7MHz, Vi = 100dBμ, fm = 1kHz, Modulation = 75kHz Current drain Demodulator output Total harmonic distortion Signal-to-noise ratio AM rejection ratio 3dB sensitivity SD sensitivity IF counter buffer output Mute attenuation VIFBuff-FM Mute-Att ICCO-FM VOFM THDFM S/NFM AMR 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 38 200 73 47 20 230 30 360 0.35 80 65 32 47 275 76 40 56 400 40 460 1.5 mA mVrms % dB dB dBμ dBμ mVrms dB Ratings typ max Unit FM stereo characteristics fc = 10.7MHz, Vi = 100dBμ, fm = 1kHz, L + R = 90%, pilot = 10% Separation Stereo on level Total harmonic distortion Adjacent channel rejection ratio SepL STON THD-main Brej-3rd Brej-5th Carrier leak 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 30 1.5 42 3.5 0.45 36 41 44 5.5 1.5 dB % % dB dB dB AM characteristics fc = 1000kHz, Vi = 80dBμ, fm = 1kHz, Modulation = 30% Current drain Detector output 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 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 13 40 90 17 46 27 80 160 23 52 0.4 0.5 20 140 285 1.1 1.3 29 200 400 39 160 230 mA mVrms mVrms dB dB % % dBμ mVrms mVrms No.7185-2/9 LA1845N Package Dimensions unit : mm (typ) 3067B 21.0 24 13 0.9 0.95 3.9 max 3.3 (0.71) 0.51min (3.25) 1.78 0.48 SANYO : DIP24S(300mil) Block Diagram OSC BUFF VT + FM SD ADJ OSC RF V-SM + + R 19 18 17 16 15 14 L 13 FM BAND-W 24 23 22 21 20 ALC BUFF AM OSC AM MIX AM RF.AMP AGC DECODER ANTI-BIRDIE PILOT CANCEL 0.25 1 12 7.62 6.4 AM IF LEVEL DET AM/FM IF BUFF AM DET P-DET φ STEREO SW S-CURVE COMP VCO 304kHz TUNING DRIVE FF 38K FF π 19K∠ 2 FF 19K∠0 PILOT DET FM IF FM DET REG GND VCC 1 2 450kHz 3 4 5 6 TU-LED 7 ST-LED 8 9 10 11 12 FM + + ST MONO VCC (4.3 to 8.5V) Top view FM-IN (10.7MHz) + For AM stereo IFOUT AM/FM IF-BUFF SEEK MUTE + AM No.7185-3/9 LA1845N Test Circuit AM-IN (1MHz) OSC BUFF 1000pF 5.6kΩ 6.8kΩ 24 23 22 21 20 19 18 39pF 20pF HW50425 0.047μF 50Ω 22μF 0.047μF 1000pF 4.7μF + 10μF + 0.01μF 20kΩ 17 16 15 14 13 A A LPF 0dB LPF ROUT LOUT 39MH + 3.3μF 20kΩ 0.1μF 65kΩ 0.0047μF 0.015μF 0.015μF LA1845N 1 FM-IN (10.7MHz) 300Ω 75Ω 33μF 0.047μF + 0.047μF 2 3 4 5 V-SD 6 TU-LED ST-LED V-ST 1000pF 7 8 10kΩ 50kΩ 9 1000pF AM/FM IF-BUFF 10 HW6215 50kΩ 11 12 1μF 3kΩ 1μF + + + NORMAL 0.47μF FM AM MONO VCC 5.0V 20pF SEEK AM IF 600BEAS-10471 Detector coil Discriminator Top view Pin Functions Pin No. 1 Pin function FM IF input Pin voltage (V) Vreg Pin description Input impedance ri = 330Ω Equivalent circuit 1 3 2 AM mixer output VCC Connect the mixer coil between this pin and VCC. 2 3 REG 2.3 Vreg = 2.3V 3 4 AM IF input Vreg Input impedance ri = 2kΩ 4 5 6 7 GND Tu-LED ST-LED / AM-IF output 0 VCC VCC Active low Open collector 6 7 8 9 10 FM detector VCC AM / FM IF counter output, output control switch, mute switch VCC The 600BEAS-10471 (Toko Mfg. Co., Ltd.) is recommended for detector coil. V10 ≤ 0.5V : Reception state 1.4V ≤ V10 ≤ 2.2V : Muting on V10 ≤ 3.5V : IF counter output and muting on 0 10 Continued on next page. No.7185-4/9 LA1845N Continued from preceding page. Pin No. 11 Pin function Phase comparator low-pass filter (AM/FM switching) Pin voltage (V) VCC-1.0 Pin description The device operates in AM mode when a current of over 200μA flows from pin.12. Limit values for the resistor : 2.7kΩ (When VCC = 7V) 3.9kΩ (8V) Equivalent circuit 11 12 Pilot detector low-pass filter (Forced mono) (VCO stop) VCC-1.0 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. The limit values for the resistor are the same as those for pin 11. 12 13 14 L outputs R outputs 3.2 3.2 Output impedance ro = 3.3kΩ 13 ( 14 ) 15 Pilot canceler output Vreg 15 3 16 Decoder input Vreg Inverting input pin RNF = 20kΩ RNF 16 17 PLL input Vreg Input impedance ri = 20kΩ 17 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. 18 19 AM detector output 0 (FM) 1.5 (AM) Output impedance ro = 10kΩ 100V 19 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. 20 R 21 AM RF input Vreg Must be used at the same potential as pin 22. 21 22 AFC Vreg The FM SD bandwidth can be adjusted with the external resistor connected between this pin and pin 3 (Vreg). 22 Continued on next page. No.7185-5/9 LA1845N Continued from preceding page. Pin No. 23 Pin function OSC Pin voltage (V) VCC pin 9 (VCC). Note : Impedance of the secondary oscillator coil must be 5kΩ or higher. Pin description Connect the oscillator coil between this pin and Equivalent circuit 23 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. 24 No.7185-6/9 LA1845N 10 0 AM input/output characteristics 4.0 3.5 3.0 0 FM input/output characteristics 1 S Total harmonic distortion, THD -- % S-meter voltage, Vsm -- V Output voltage, VO -- dBV --10 S --20 --30 --40 --50 --60 --70 0 20 40 60 2.5 Output voltage, VO -- dBV --20 --40 Vsm 2.0 1.5 1.0 --60 AM N --80 THD N 80 100 0.5 0 120 --100 0 20 40 60 80 100 120 Input, INPUT -- dBμ 6 Input, INPUT -- dBμ 2.0 FM input/output characteristics 2 Total harmonic distortion, THD -- % FM detuning characteristics 1.0 S-meter voltage, Vsm -- V Total harmonic distortion, THD -- % 5 4 2 Vs 3 m 1.0 AF C 0 0.5 --0.5 1 THD 0 10.60 --1.0 10.80 THD 0 0 20 40 60 80 100 120 10.65 10.70 10.75 Input, INPUT -- dBμ 10 Frequency, fc -- MHz 60 Multiplex frequency characteristics 1 Multiplex frequency characteristics 2 Total harmonic distortion, THD -- % Channel separation, Sep -- dB 50 L 1.0 sub ma st in 40 R 0.1 mono 30 0.01 10 100 1k 10k 100k 20 10 100 1k 10k 100k Modulation frequency, fm -- Hz 0 Modulation frequency, fm -- Hz 3.5 40 AM supply voltage characteristics 1 AM supply voltage characteristics 2 --10 Signal-to-noise ratio, SN -- dB Channel separation, Sep -- dB S Vsm80 Vsm40 3.0 Total harmonic distortion, THD -- % S-meter voltage, Vsm -- V Output voltage, VO -- dBV 30 --20 2.5 SD 20 --30 2.0 SN23 --40 1.5 --50 Vsm0 THD N 1.0 10 --60 --70 3 4 5 6 0.5 0 10 0 3 4 5 6 7 8 9 10 7 8 9 Supply voltage, VCC -- V Supply voltage, VCC -- V No.7185-7/9 AFC voltage, Vafc -- V 1.5 0.5 LA1845N FM supply voltage characteristics 1 S Total harmonic distortion, THD -- % S-meter voltage, Vsm -- V --10 8 7 6 0 9 50 FM supply voltage characteristics 2 SD Output voltage, VO -- dBV --30 --40 --50 Vsm100 5 4 Sensitivity, Sens -- dBμ --20 40 30 LS Vsm70 --60 --70 --80 --90 3 4 5 6 7 8 9 AM THD Vsm0 3 2 20 N 1 0 10 10 3 4 5 6 7 8 9 10 60 Multiplex supply voltage characteristics 1 Supply voltage, VCC -- V 6 0 AM temperature characteristics 1 Vsm80 Supply voltage, VCC -- V 3.0 Channel separation, Sep -- dB 50 5 S 2.5 40 SepR ST sensitivity, VL -- % SepL 4 --20 Vsm40 --40 20 30 Vlon 3 1.5 Vsm0 1.5 --60 20 Vloff 2 10 1 N THD 0.5 0 2 3 4 5 6 7 8 9 0 10 --80 --40 --20 0 20 40 60 80 0 100 40 AM temperature characteristics 2 Supply voltage, VCC -- V Ambient temperature, Ta -- °C 0 FM temperature characteristics 1 S 6 Sensitivity, Sens -- dBμ 30 Output voltage, VO -- dBV --20 Vsm1 00 5 SN23 20 4 --40 SD Vsm70 3 --60 AM --80 2 10 N THD Vsm0 40 60 80 1 0 --40 --20 0 20 40 60 80 100 --100 --40 --20 0 20 0 100 Ambient temperature, Ta -- °C 50 Ambient temperature, Ta -- °C 5 FM temperature characteristics 2 SD Total harmonic distortion, THD -- % FM temperature characteristics 3 1.5 4 1.0 Sensitivity, Sens -- dBμ 40 0.5 3 30 LS AFC -25°C 2 0 AFC 0°C AFC 50°C AFC 75°C AFC 25°C 10.7 --0.5 20 1 --1.0 10 --40 --20 0 20 40 60 80 100 0 10.6 --1.5 10.8 Ambient temperature, Ta -- °C Input frequency, fc -- MHz No.7185-8/9 AFC voltage, Vafc -- mV THD 75°C THD -25°C THD 0°C THD 25°C THD 50°C Total harmonic distortion, THD -- % S-meter voltage, Vsm -- V Total harmonic distortion, THD -- % S-meter voltage, Vsm -- V Output voltage, VO -- dBV LA1845N 60 Multiplex temperature characteristics 1 Total harmonic distortion, THD -- % 2.0 Multiplex temperature characteristics 2 Channel separation, Sep -- dB 50 1.5 S epL SepR 40 1.0 30 0.5 THDmono THDsub THDst THDmain 20 --40 --20 0 20 40 60 80 100 0 --40 --20 0 20 40 60 80 100 Ambient temperature, Ta -- °C 90 Ambient temperature, Ta -- °C 8 Multiplex temperature characteristics 3 Free-running frequency drift, Δf -- % Capture range, CR -- % Multiplex temperature characteristics 4 CR+ 4.0 3.5 3.0 6 4 Signal-to-noise ratio, SN -- dB Muting attenuation, Matt -- dB Vlon 2 0 --2 --4 2.5 S/Nst 70 t M At ΔfF Vloff 2.0 1.5 1.0 60 CR--6 --8 --40 0.5 0 100 50 --40 --20 0 20 40 60 80 100 --20 0 20 40 60 80 Ambient temperature, Ta -- °C Ambient temperature, Ta -- °C SANYO Semiconductor Co.,Ltd. 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 Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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 Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of July, 2009. Specifications and information herein are subject to change without notice. PS No.7185-9/9 ST sensitivity, VL -- % 80 S/Nmono