LA1836M

Ordering number : EN4787A Monolithic Linear IC LA1836, 1836M Single-Chip Home Stereo Electronic Tuning IC Overview AM: RF amplifier, mixer, oscillator (with ALC), IF amplifier, detector, AGC, oscillator buffer, tuning indicator (narrow-band SD), IF buffer output, IF output for AM stereo • FM IF: IF amplifier, quadrature detector, band muting, tuning indicator, IF buffer output, S-meter • MPX: PLL stereo decoder, stereo indicator, forced mono, VCO stop function, adjacent channel interference rejection function (114 kHz), post-amplifier (with muting function) Package Dimensions unit: mm 3196-DIP30SD [LA1836] Features • Reduced number of adjustments (adjustment-free MPX VCO: ceramic resonator adopted) • Tuning indicator pin (Can be used as a narrow-band stop signal and as a muting output driver.) • Variable FM stop sensitivity and band • Variable AM stop sensitivity • Built-in AM local oscillator buffer • Variable AM low cut control SANYO: DIP30SD unit: mm 3073A-MFP30S [LA1836M] SANYO: MFP30S SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN O3097HA (OT)/82294TH (OT) B8-0904, B8-0850 No. 4787-1/13 LA1836, 1836M 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 At Ta ≤ 70°C, on the recommended printed circuit board* [LA1836, LA1836M] At Ta = 70°C, independent IC [LA1836M only] Conditions Ratings 9.0 550 320 –20 to +70 –40 to +125 Unit V mW mW °C °C Note: * An 85 × 115 × 1.6 mm3 glass-epoxy printed circuit board. Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCC op Ratings 7.0 6.5 to 8.5 Unit V V Electrical Characteristics at Ta = 25°C, VCC = 7.0 V unless otherwise specified (MFP package using the Yamaichi Electric IC-51-0302-426MF socket) Parameter Symbol Conditions min typ max Unit [FM characteristics (mono): fc = 10.7 MHz, fm = 1 kHz, with the coil adjusted at VREG – VAFC = 0 V] Quiescent current Demodulator output Channel balance (mono) Total harmonic distortion S/N ratio AM suppression ratio Input limiting voltage LED on sensitivity LED on bandwidth IF count buffer output ICCO-FM VO-FM C.B-mono No input 100 dBµ, 100% mod, the pin 16 output 100 dBµ, 100% mod, the pin 16 output/pin 17 output 730 –1.5 37 1100 0 0.3 1.5 72 40 80 60 34 46 100 dBµ 100 dBµ, the pin 11 output 90 80 0 1.8 3.5 80 56 125 120 0.5 3.2 4.2 95 42 66 170 160 1.0 4.5 5.0 50 1460 +1.5 1.3 8.0 mA mVrms dB % % dB dB dBµ dBµ kHz mVrms V V V dB THD-FM (1) 100 dBµ, 100% mod, the pin 16 output THD-FM (2) 100 dBµ, 200% mod, the pin 16 output S/N-FM AMR –3dBL.S. SD-On-FM SD-BW VIFBuff-FM 100 dBµ, 100% mod, the pin 16 output 100 dBµ, AM 30% mod, the pin 16 output 100 dBµ, referenced to 100% mod, a 3 dB down input VSM-FM (1) 0 dBµ, the pin 12 output S-meter output VSM-FM (2) 60 dBµ, the pin 12 output VSM-FM (3) 100 dBµ, the pin 12 output Muting attenuation Mute-Att 100 dBµ, 100% mod, the pin 16 output [FM characteristics (stereo): fc = 10.7 MHz, fm = 1 kHz, L + R = 90%, pilot = 10%, VIN = 100 dBµ] Separation - L Separation - R Stereo on level Stereo off level Total harmonic distortion (main) Channel balance (main) Capture range Adjacent channel interference rejection ration Sep-L Sep-R ST-on ST-off THD-main C.B-main C.R B.Rej. L mod, the pin 17 output/pin 16 output R mod, the pin 16 output/pin 17 output The pilot modulation such that V7 < 0.7 V The pilot modulation such that V7 > 4.5 V The pin 16 output The pin 16 output/pin 17 output Pilot = 10% fs = 113 kHz, Vs = 90%, pilot = 10%, the pin 16 output 30 30 1.8 45 45 3.6 2.5 0.3 1.3 +1.5 6.0 dB dB % % % dB % dB –1.5 0 ±1.5 40 Continued on next page. No. 4787-2/13 LA1836, 1836M Continued from preceding page. Parameter Symbol Conditions min typ max Unit [AM characteristics: fc = 1000 kHz, fm = 1 kHz] Quiescent current Detector output ICCO-AM VO-AM (1) VO-AM (2) No input 23 dBµ, 30% mod, the pin 16 output 80 dBµ, 30% mod, the pin 16 output 25 195 16 48 29 45 310 20 54 0.3 0.4 0.8 1.0 20 80 dBµ, 30% mod, the pin 16 output Referenced to fm = 1 kHz, the output when fm = 100 Hz 80 dBµ, unmodulated, the pin 11 output 80 dBµ, unmodulated, the pin 8 output 110 5 140 8 0 1.3 30 160 7 200 17 0 3.0 11 280 24 0.2 4.5 1.0 1.2 1.6 4.0 40 42 90 490 mA mVrms mVrms dB dB % % % % dBµ mVrms dB mVrms mVrms V V S/N ratio S/N-AM (1) 23 dBµ, 30% mod, the pin 16 output S/N-AM (2) 80 dBµ, 30% mod, the pin 16 output THD-AM (1) 80 dBµ, 30% mod, the pin 16 output Total harmonic distortion THD-AM (2) 100 dBµ, 30% mod, the pin 16 output (DIP) THD-AM (2) 107 dBµ, 30% mod, the pin 16 output (MFP) THD-AM (3) 80 dBµ, 80% mod, the pin 16 output LED on sensitivity Local oscillator buffer output Low band attenuation IF count buffer output ST-IF output S-meter output SD-On-AM VOSC-AM Low-Cut VIFBuff-AM VSTIF-AM VSM-AM (1) 0 dBµ, unmodulated VSM-AM (2) 40 dBµ, unmodulated No. 4787-3/13 LA1836, 1836M Block Diagram Unit (resistance: Ω, capacitance: F) Test Circuit Diagram Unit (resistance: Ω, capacitance: F) No. 4787-4/13 LA1836, 1836M Pin Functions Pin No. Function Voltage Internal equivalent circuit Remarks 1 FM IF input VREG Input impedance ri = 330 Ω 2 AM mixer output VCC 3 FM IF input bypass VREG Also used for the AM noise filter 4 REG VREG VREG = 3.6 V 5 AM IF input VREG Input impedance ri = 2 kΩ 6 GND 0V 7 8 Tu – LED ST – LED, AM – IF output VCC VCC Active low Open collector AM stereo IF output (pin 8) 9 FM detector VCC Recommended detector coil: 600TEAS-8199Z (Toko) SA281 (Sumida) 10 VCC VCC 11 AM/FM IF buffer output, output control SW (muting switch) 0V The post-amplifier muting turns on for applied voltages of 1.3 V and over. The IF buffer output turns on at 4.0 V and over. Recommended muting on control voltage: 1.9 V Continued on next page. No. 4787-5/13 LA1836, 1836M Continued from preceding page. Pin No. Function Voltage Internal equivalent circuit Remarks 12 S-meter output, AM SD sensitivity adjustment 0.5 V (FM) 0 V (AM) The AM SD sensitivity can be adjusted with the resistor between this pin and ground. The AM SD sensitivity should be adjusted first, since the FM SD sensitivity is affected by this adjustment. 13 AM narrow band CF connection 1.5 V Recommended narrow band CF: BFU450C4N (Murata) 14 Phase comparator lowpass filter (FM/AM switch) VCC – 1.4 (FM) 0 V (AM) AM mode selected when this pin is connected to ground. 15 Pilot detector low-pass filter (forced mono) (VCO stop) VCC – 1.0 The circuit is forced to mono when a current of 50 µA or larger flows from this pin. Connecting this pin to ground stops the VCO. 16 17 Post-amplifier L output and R output VREG VREG Output impedance ro = 200 Ω Pin 16: left output Pin 17: right output 18 19 Post-amplifier L input and R input VREG VREG Inverting inputs: ri = 3.3 kΩ Pin 18: left input Pin 19: right input 20 21 MPX output, L output and R output 3.5 V 3.5 V Output impedance ro = 3.3 kΩ Pin 20: left de-emphasis Pin 21: right de-emphasis 22 MPX input 2.9 V Input impedance ri = 20 kΩ The low-band separation characteristics are improved by increasing the value of the capacitor connected between this pin and pin 24. However, the impulse noise associated with AM/FM switching will increase. Continued on next page. No. 4787-6/13 LA1836, 1836M Continued from preceding page. Pin No. Function Voltage Internal equivalent circuit Remarks 23 MPX VCO 3.5 V (FM) 0 V (AM) Recommended ceramic resonator: CSB456F15 (Murata) 24 AM/FM demodulator output 2.9 V (FM) 3.0 V (AM) Output impedance: 1.5 kΩ (FM), 10 kΩ (AM) The separation can be adjusted with the external capacitor connected between this pin and ground. 25 AM low cut 2.9 V (FM) 3.0 V (AM) The AF demodulation frequency low area frequency characteristics can be adjusted with the external capacitor connected between this pin and ground. The AM detector output can be attenuated by connecting a resistor in series with this capacitor. 26 AM AGC 0 V (FM) 0.5 V (AM) Internal load resistance: R = 6.7 kΩ 27 AM RF input VREG This pin must be used at the same potential as pin 4. 28 AFC VREG The FM-SD bandwidth can be adjusted with the external resistor connected between this pin and pin 4. 29 OSC VREG The oscillator coil is connected between this pin and pin 4. 30 Oscillator buffer output, FM SD sensitivity adjustment 1.6 V (FM) 1.3 V (AM) The FM SD sensitivity can be adjusted with the external resistor connected between this pin and ground. Output impedance ro = 200 Ω No. 4787-7/13 LA1836, 1836M No. 4787-8/13 LA1836, 1836M No. 4787-9/13 LA1836, 1836M No. 4787-10/13 LA1836, 1836M No. 4787-11/13 LA1836, 1836M No. 4787-12/13 LA1836, 1836M s 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 loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Œ 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 responsibility 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. s 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 October, 1997. Specifications and information herein are subject to change without notice. No. 4787-13/13