NTE1486 Integrated Circuit FM/AM Tuner System Description: The NTE1486 is an integrated circuit in a 16+2−Lead DIP type package designed for use in stereo applications. This high performance device integrates all the functions necessary for FM IF and detection by AM IF amplifiers. Functions: FM D IF Amplifier D Detector Circuit D Low Noise Audio Amplifier D Signal Meter Circuit D Center Meter Circuit D Muting Circuit D AFC Circuit AM D IF Amplifier D AGC Circuit Features: D Labor Saving and Miniaturization are Possible, since the FM IF Amplifier Detection and AM IF Amplifiers are Enclosed in the Same Package. D FM IF Amplifiers have High Stability due to the Adoption of the Full Balance Three Stage Direct Coupled Differential Amplifier. D Utilizes the Quadrature Detection Circuit. D High Sensitivity (Input limiting sensitivity: 15V Typ) D Large Detection Output: 450mVrms Typ @ 100% modulation D Low Distortion Factor: 0.04% Typ, when the double tuning detection coil is used D High Signal−to−Noise Ratio: 79dB Typ D Muting Circuit which does not Produce the Unbalance at Right or Left when Detuning. D Muting Attenuation is Large: 80dB Typ D AM Rejection Ratio is Good: 55dB @ 100dBμ Input D Signal−to−Noise Ratio of AM IF is Good: 50dB @ 64dBμ Input D AGC FOM of AM IF is Good: 48dB D Electrodynamic Range for the Input of the Signal Meter is Large: 43dBμ to 115dBμ Typ Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13V Power Dissipation (TA = +60°C), PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 730mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C Storage Temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +125°C DC Electrical Characteristics: (TA = +25°C, VCC = 12V, Non−Signal unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit AM IF Bypass (Pin1) V1 − 2.7 − V AM IF Input (Pin4) V4 − 0.7 − V FM IF Input DC Feedback (Pin6) V6 − 1.9 − V FM IF Input DC Feedback (Pin7) V7 − 1.9 − V FM IF Input (Pin8) V8 − 1.9 − V Muting Control Voltage (Pin10) V10 − 5.4 − V Reference (Pin12) V12 − 5.6 − V AFC (Pin15) V15 − 5.6 − V Audio Output (Pin16) V16 − 5.6 − V Min Typ Max Unit Vin = 100dBμ, Mute; ON − 38.5 56.2 mA Vin = −3dB point from output voltage when 100dBμ input − 31 37 dBμ AC Electrical Characteristics: (VCC = 12V, Note 1 unless otherwise specified) Parameter Total Current Drain Symbol I11 Test Conditions FM Limiting Sensitivity Vin(lim) Recovered AF Voltage V01(AF) 270 450 700 mVrms THD − 0.04 0.1 % (S+N/N) 73 79 − dB Vin = 100dBμ, FM; 400Hz, Δf = 75kHz, AM; 1kHz, m = 0.3 − 55 − dB Total Harmonic Distortion Signal−to−Noise Ratio AM Rejection Ratio AMR Muting Sensitivity Vin(Mute) V10 = 1.4V 42 48 53 dBμ Muting Attenuation Mute(ATT) V17 = 2V 73 80 − dB Muting Bandwidth BW(Mute) V10 = 1.4V, Note 2 78 130 220 kHz V9 − 70 Vin = 70dBμ 0.5 1.8 − V V9 − 100 Vin = 100dBμ 3.0 4.4 − V V02(AF) 55 82 125 mVrms THD − 0.5 2.0 % (S+N/N) 44 50 − dB − 48 − dB − 0.9 − kΩ Meter Swing AM Recovered AF Voltage Total Harmonic Distortion Signal−to−Noise Ratio IF AGC Figure of Merit Input Impedance AGC(FOM) Vin = Voltage difference from 84dBμ input, when 10dB output down Rin Note 1. Unless otherwise specified, test conditions are as follows: FM: f(IF) = 10.7MHz, f(MOD) = 400Hz, Δf = 75kHz, Vin = 100dBμ AM: f(IF) = 455kHz, f(MOD) = 400Hz, m = 0.3, Vin = 64dBμ Note 2. BW(mute) is tested under sampling of ALQ = 1.0%. Pin Connection Diagram Mute 17 AM IF Amp Filter 1 16 Audio Output 15 AFC Output AM IF Output 2 14 Limiter Output AM IF AGC Input 3 AM IF Input 4 13 Quad Det Input 12 Quad Det Output GND 5 11 VCC FM Decouple 6 AM/FM Switch 7 10 MPX Cont Output FM IF Input 8 9 Tune Meter Output GND 18 1.007 (25.5) Max .964 (24.4) 18 17 1 8 .291 (7.4) Max 16 9 .248 (6.3) .252 (6.4) .200 (5.08) 15° .188 (4.77) .020 (.508) .051 (1.29) .100 (2.54) Typ .009 (0.22)