Ordering number : EN4787A Monolithic Linear IC LA1836, 1836M Single-Chip Home Stereo Electronic Tuning IC Overview Package Dimensions 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 unit: mm 3196-DIP30SD [LA1836] • 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) 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 Symbol Maximum supply voltage Conditions Ratings VCC max Allowable power dissipation Pd max At Ta ≤ 70°C, on the recommended printed circuit board* [LA1836, LA1836M] At Ta = 70°C, independent IC [LA1836M only] Unit 9.0 V 550 mW 320 mW Operating temperature Topr –20 to +70 °C Storage temperature Tstg –40 to +125 °C Note: * An 85 × 115 × 1.6 mm3 glass-epoxy printed circuit board. Operating Conditions at Ta = 25°C Parameter Symbol Recommended supply voltage VCC Operating supply voltage range VCC op Ratings Unit 7.0 V 6.5 to 8.5 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 37 50 100 dBµ, 100% mod, the pin 16 output 730 1100 1460 mVrms 100 dBµ, 100% mod, the pin 16 output/pin 17 output –1.5 [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 ICCO-FM VO-FM C.B-mono 0 +1.5 dB 0.3 1.3 % THD-FM (2) 100 dBµ, 200% mod, the pin 16 output 1.5 8.0 S/N-FM AMR Input limiting voltage –3dBL.S. LED on sensitivity SD-On-FM LED on bandwidth SD-BW VIFBuff-FM 100 dBµ, 100% mod, the pin 16 output 72 80 100 dBµ, AM 30% mod, the pin 16 output 40 60 100 dBµ, referenced to 100% mod, a 3 dB down input Muting attenuation 34 % dB dB 42 dBµ dBµ 46 56 66 100 dBµ 90 125 170 kHz 100 dBµ, the pin 11 output 80 120 160 mVrms VSM-FM (1) 0 dBµ, the pin 12 output S-meter output mA THD-FM (1) 100 dBµ, 100% mod, the pin 16 output AM suppression ratio IF count buffer output No input 0 0.5 1.0 V VSM-FM (2) 60 dBµ, the pin 12 output 1.8 3.2 4.5 V VSM-FM (3) 100 dBµ, the pin 12 output 3.5 4.2 5.0 80 95 Mute-Att 100 dBµ, 100% mod, the pin 16 output V dB [FM characteristics (stereo): fc = 10.7 MHz, fm = 1 kHz, L + R = 90%, pilot = 10%, VIN = 100 dBµ] Separation - L Sep-L L mod, the pin 17 output/pin 16 output 30 45 dB Separation - R Sep-R R mod, the pin 16 output/pin 17 output 30 45 dB 1.8 Stereo on level ST-on The pilot modulation such that V7 < 0.7 V Stereo off level ST-off The pilot modulation such that V7 > 4.5 V 2.5 Total harmonic distortion (main) THD-main The pin 16 output Channel balance (main) C.B-main The pin 16 output/pin 17 output Capture range Adjacent channel interference rejection ration C.R B.Rej. Pilot = 10% fs = 113 kHz, Vs = 90%, pilot = 10%, the pin 16 output –1.5 3.6 6.0 % 0.3 1.3 % 0 +1.5 dB % ±1.5 % 40 dB 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 S/N ratio Total harmonic distortion LED on sensitivity ICCO-AM 29 42 mA VO-AM (1) No input 23 dBµ, 30% mod, the pin 16 output 25 45 90 mVrms VO-AM (2) 490 mVrms 80 dBµ, 30% mod, the pin 16 output 195 310 S/N-AM (1) 23 dBµ, 30% mod, the pin 16 output 16 20 S/N-AM (2) 80 dBµ, 30% mod, the pin 16 output 48 54 0.3 1.0 % THD-AM (2) 100 dBµ, 30% mod, the pin 16 output (DIP) 0.4 1.2 % THD-AM (2) 107 dBµ, 30% mod, the pin 16 output (MFP) 0.8 1.6 % THD-AM (3) 80 dBµ, 80% mod, the pin 16 output 1.0 4.0 % 20 30 40 dBµ 110 160 5 7 11 dB 140 200 280 mVrms SD-On-AM Local oscillator buffer output VOSC-AM 80 dBµ, 30% mod, the pin 16 output Low-Cut Referenced to fm = 1 kHz, the output when fm = 100 Hz IF count buffer output VIFBuff-AM 80 dBµ, unmodulated, the pin 11 output VSTIF-AM 80 dBµ, unmodulated, the pin 8 output S-meter output dB THD-AM (1) 80 dBµ, 30% mod, the pin 16 output Low band attenuation ST-IF output dB VSM-AM (1) 0 dBµ, unmodulated VSM-AM (2) 40 dBµ, unmodulated mVrms 8 17 24 mVrms 0 0 0.2 V 1.3 3.0 4.5 V 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 Input impedance ri = 330 Ω 1 FM IF input VREG 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 Tu – LED VCC 8 ST – LED, AM – IF output VCC 9 FM detector VCC 10 VCC VCC 11 AM/FM IF buffer output, output control SW (muting switch) 0V Active low Open collector AM stereo IF output (pin 8) Recommended detector coil: 600TEAS-8199Z (Toko) SA281 (Sumida) 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 12 S-meter output, AM SD sensitivity adjustment 0.5 V (FM) 0 V (AM) 13 AM narrow band CF connection 1.5 V 14 Phase comparator lowpass filter (FM/AM switch) 15 16 17 18 19 20 21 22 Pilot detector low-pass filter (forced mono) (VCO stop) Post-amplifier L output and R output VCC – 1.4 (FM) 0 V (AM) VCC – 1.0 Remarks 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. Recommended narrow band CF: BFU450C4N (Murata) AM mode selected when this pin is connected to ground. 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. VREG VREG Post-amplifier L input and R input VREG MPX output, L output and R output 3.5 V MPX input Internal equivalent circuit VREG 3.5 V 2.9 V Output impedance ro = 200 Ω Pin 16: left output Pin 17: right output Inverting inputs: ri = 3.3 kΩ Pin 18: left input Pin 19: right input Output impedance ro = 3.3 kΩ Pin 20: left de-emphasis Pin 21: right de-emphasis 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 ■ 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. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ 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: ➁ 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. ■ 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