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 Min Typ Max Unit Quiescent 12.5 18.0 24.5 mA 120dBu input 14.0 20.0 26.5 mA 24dBu input, 30% mod. −31.0 −26.5 −22.0 dBu 74dBu input, 30% mod. −18.0 −15.5 −12.0 dBu 24dBu input, 30% mod. 16 20 − dB 74dBu input, 30% mod. 46 50 − dB 74dBu input, 30% mod. − 0.35 1.0 % 74dBu input, 80% mod. − 0.35 1.5 % 120dBu input, 30% mod. − 0.35 2.0 % 5.2 5.6 5.9 V RF AGC Voltage for Reference V16 Quiescent Signal−to−Noise Ratio S/N 35dBu input, 30% mod. − 31 − dB Total Harmonic Distortion THD 128dBu input, 80% mod. − 0.58 − % Detector Output Drift ∆VO (120dBu)/vo (74dBu) − 0.4 − dB 6dB width, 15dBu input 30% mod. − 7 − kHz 60dB width, 15dBu input 30% mod. − 30 − kHz ±10kHz off tuning, 15dBu input, 30% mod. − 40 − dB 100dBu input, IF VCC (Pin13) Ripple Level 50Hz − 15dBm − 40.5 − dB − 350 − mVrms VOSCL (515kHz) − VOSCH (1660kHz) − 20 − mVrms 74dBu input, 400Hz beat max. − −33 − dB 120dBu input − 1 − V 100dBu input, ±10kHz − 300 − mVrms IF Rejection Ratio fr = 600kHz, 15dBu input − 91.5 − dB Image Rejection Ratio fr = 1400kHz, 15dBu input − 70.5 − dB Bandwidth Selectivity (1 signal) ACA Ripple Rejection Ratio Local Oscillation Voltage Local Osc Drift VOSC ∆VOSC Whistle, 2 fitweet RF AGC Voltage RF Output Voltage V16 VORF Pin Connection Diagram (Front View) 16 15 RF AGC AGC Input 14 Detector Output 13 IF VCC 12 IF 2 Input 11 IF 1 Output 10 9 GND IF 1 Input 8 Mixer Output 7 RF VCC 6 Mixer Input 5 RF Output OSC 4 3 Vref RF Input RF Bypass 2 1 .953 (24.1) .127 (3.2) .257 (6.5) .334 (8.48) 16 1 .125 (3.17) .059 (1.5) .118 (3.0)