NTE1484 Integrated Circuit Phase Lock Loop (PLL) Stereo Demod Features: D High−Quality FM Stereo Demodulator using PLL Technique for Separating L and R Signals from Composite Signal D Less Peripheral Components; No Coils D Total System − Including Stereo Demodulator, Automatic Stereo−Monaural Switching Circuit, and Stereo Indicator Lamp Driver D Separation Controllable, Plus Very High Separation (Sep; 55dB Typ. at f = 1kHz) D Low Total Harmonic Distortion during Stereo and Monaural Operation by using New Circuit (Mono; 0.05%, Stereo; 0.1% at f = 1kHz, Vin = 200mV) D Fully Synchronized Stereo Indicator Lamp D High−Output Voltage Level (Vout = 1.2V at Vin = 200mV) D Low Total Harmonic Distortion at High Frequency; (Main; 0.4%, L or R; 0.15%, Sub; 0.3% at f = 10kHz) D Low Shock Noise during Stereo−Monarual Switching Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Lamp Current, IL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75mA Power Dissipation (TA = +70°C), PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 490mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +125°C Electrical Characteristics: (VCC = 12V, f = 1kHz, TA = +25°C unless otherwise specified) Parameter Symbol Input Impedance Zin Channel Separation Sep Stereo Total Harmonic Distortion Test Conditions P = 20mV, L + R = 180mV, 180mV VCO freq = 76kHz ST THD P = 20mV, L + R = 180mV, 180mV (L + R = 45%, L − R = 45%, 45% P = 10%) Min Typ Max Unit − 75 − kΩ f = 100Hz − 42 − dB f = 1kHz 40 55 − dB f = 10kHz − 42 − dB f = 100Hz − 0.1 − % f = 10kHz − 0.1 0.3 % f = 10kHz − 0.15 − % Electrical Characteristics (Cont’d): (VCC = 12V, f = 1kHz, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Output Voltage Vout Vin = 200mV − 1.2 − V Channel Balance CB Vin = 200mV −1.5 − +1.5 dB MONO THD Vin = 200mV − 0.05 0.25 % f = 19kHz − 30 − dB f = 38kHz − 30 − dB − 75 − dB 4 7 13 mV − 6 − dB P = 14mV − ±3 − % Monaural Total Harmonic Distortion Carrier Lock CL SCA Rejection Ratio P = 20mV, L = R = 180mV, 180mV Note 1 SCA Rej P = 20mA, L + R = 180mV, SCA = 20mV, fSCA = 67kHz Pilot Level for Lamp ON L(ON) Stereo Lamp Hysteresis Capture Range CR Signal−To−Noise Ratio S/N Total Current Drain IT lamp OFF − 17.5 − mA Maximum Input Signal Vin Monaural THD = 1% − 400 − mV Pin12 Voltage for Lamp OFF − 0.55 − V Threshold Voltage Stereo−Monaural Switching Note 1. Output terminal of IC Pin Connection Diagram VCC 1 16 Time Constant Input 2 15 LPF 0.047µF to Pin13 3 14 LPF Lt Output 4 13 0.047µF to Pin13 Rt Output 5 12 Stereo/Mono Switch Feedback 6 11 LPF Feedback 7 10 LPF GND 8 9 Stereo Lamp 16 9 .260 (6.6) Max 1 8 .785 (19.9) Max .300 (7.62) .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7)