NTE1541 Integrated Circuit FM IF Amp & Detector for Car Radio Features: D FM IF amplifier and limiter D Demodulated output: 600mVrms (Max.) D Total harmonic distortio: 0.3% (Max.) Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Maximum Supply Voltage, VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V Maximum Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7Vrms Allowable Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +80°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +125°C Note 1. Derate by 4mW per 1°C when used at temperatures above +25°C. Recommended Operating Conditions: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V Electrical Characteristics: (TA = +25°C, VCC = 12V, f = 10.7MHz, fm = 400Hz 100% Modulation) Parameter Symbol Test Conditions Min Typ Max Unit Current Drain ICC 8 12 15 V Output Pin (Pin 7) DC Voltage V7 3.7 − 5.2 V Demodulated Output VO VIN = 80dBμ 400 − 600 mVrms Input Limiting Voltage VIN(lim) −3dB limiting − 50 55 dBμ Total Harmonic Distortion THD VIN = 80dBμ − 0.2 0.3 % Signal−to−Noise Ratio S/N 70 80 − dB AM Rejection Ratio AMR 47 53 − dB Output Resistance RO 6.2 7.7 9.5 kΩ f = 400Hz Pin Connection Diagram 7 Demod Output 6 Detector Tank 5 Detector Tank 4 GND 3 VCC 2 Bypass 1 IF Input .862 (21.8) .118 (3.0) .039 (1.0) .059 (1.5) .117 (4.5) 1 7 .110 (2.8) .009 (0.22) .047 (1.19)