NTE1533

NTE1533 Integrated Circuit AM Tuner for Car Radio Description: The NTE1533 is developed for Tuning AM on a Car Radio. It uses low voltage oscillation to achieve varactor diode tuning instead of variable inductance tuning. Functions: D An RF Amplifier D A Mixer D An Oscillator with Automatic Level Control (ALC) D An IF Amplifier D A Detector D Normal AGC D Wide Band AGC on an RF Amplifier Features: D Double Balanced Mixer: Recovers IF and Spurious Interference. D Normal AGC: Less Influence of Detector Output against Varying Input. D RF Wide Band AFC: Low Operating Level (300mVRMS) Recovers Intermodulation Distortion, Large Input Characteristic at Tuning Case of Varactor Diodes. D AGC Driving Output to FET: Applies AGC to the Input FET at Varactor Diode Tuning. D Automatic Level Control at Oscillator: Recovers a Tracking Error because an Oscillation Output is Stabilized at Low Voltage Level (350mVRMS) for Varactor Diode Tuning. D Reference Voltage Output: 5.6V Reference Voltage for Other Uses. D Compensation for VCC error: Lower gain error and distortion over 7.5V to 16.0V. D Lower Ripple Voltage: Less Modulation of Carrier by Supply Voltage Ripples. D Low Pop Noise: Of Time Constant of AGC at VCC On and Mode Switch On. Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Maximum Supply Voltage (Pin7, Pin13), VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V Maximum Output Voltage (Pin5), VO5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17V Maximum Output Voltage (Pin8, Pin11), VO8, VO11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24V Maximum Input Voltage (Pin2), VImax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.6V Maximum Supply Current (Pin5, Pin7, Pin8, Pin11, Pin13 summed), ICCmax . . . . . . . . . . . . . . 35mA Maximum Flow Out Current (Pin3), I3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6mA Allowable Power Dissipation (TA ≤ +45°C) , Pdmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 520mW Operating Temperature Range, Topg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +125°C Recommended Operation Condition: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 to 14.0V Electrical Characteristics: (TA = +25°C, VCC = 8V, fr = 1MHz, fm = 400Hz unless otherwise specified) Parameter Current Dissipation Detector Output Signal−to−Noise Ratio Total Harmonic Distortion Symbol ICC VO S/N THD Test Conditions Quiescent 120dBu input 24dBu input, 30% mod. 74dBu input, 30% mod. 24dBu input, 30% mod. 74dBu input, 30% mod. 74dBu input, 30% mod. 74dBu input, 80% mod. 120dBu input, 30% mod. RF AGC Voltage for Reference Signal−to−Noise Ratio Total Harmonic Distortion Detector Output Drift Bandwidth Selectivity (1 signal) Ripple Rejection Ratio Local Oscillation Voltage Local Osc Drift Whistle, 2 fitweet RF AGC Voltage RF Output Voltage IF Rejection Ratio Image Rejection Ratio V16 VORF VOSC ∆VOSC VOSCL (515kHz) − VOSCH (1660kHz) 74dBu input, 400Hz beat max. 120dBu input 100dBu input, ±10kHz fr = 600kHz, 15dBu input fr = 1400kHz, 15dBu input ACA V16 S/N THD ∆VO Quiescent 35dBu input, 30% mod. 128dBu input, 80% mod. (120dBu)/vo (74dBu) 6dB width, 15dBu input 30% mod. 60dB width, 15dBu input 30% mod. ±10kHz off tuning, 15dBu input, 30% mod. 100dBu input, IF VCC (Pin13) Ripple Level 50Hz − 15dBm Min 12.5 14.0 −31.0 −18.0 16 46 − − − 5.2 − − − − − − − − − − − − − − Typ 18.0 20.0 −26.5 −15.5 20 50 0.35 0.35 0.35 5.6 31 0.58 0.4 7 30 40 40.5 350 20 −33 1 300 91.5 70.5 Max 24.5 26.5 −22.0 −12.0 − − 1.0 1.5 2.0 5.9 − − − − − − − − − − − − − − Unit mA mA dBu dBu dB dB % % % V dB % dB kHz kHz dB dB mVrms mVrms dB V mVrms dB dB Pin Connection Diagram (Front View) 16 15 14 12 11 10 9 8 7 6 5 4 3 2 1 RF AGC AGC Input Detector Output 13 IF VCC IF 2 Input IF 1 Output GND IF 1 Input Mixer Output RF VCC Mixer Input RF Output OSC Vref RF Input RF Bypass .953 (24.1) .127 (3.2) .257 (6.5) 1 16 .334 (8.48) .125 (3.17) .059 (1.5) .118 (3.0)