NTE1491 Integrated Circuit AM RF/IF Amp Description: The NTE1491 is an integrated circuit in a 14–Lead DIP type package designed for AM/FM receivers. Features: D Low External Parts D IF, RF, AGC, in One Single Package D Dual AGC Amps Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Signal Input Voltage, Vi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Vp–p Total Power Dissipation (TA = +75°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350mW Operating Temperature Range, Topt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C Recommended Operating Condition: (TA = +25°C unless otherwise specified) Parameter Supply Voltage Symbol Min Typ Max Unit VCC 9 13 16 V Electrical Characteristics: (TA = +25°C, VCC = 13V, f = 1MHz, fmod. = 400Hz, MOD = 30%, RL = 10kΩ unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit 18 26 34 mA Idle Current ICC Maximum Sensitivity MS υo = 20mVrms – 10 17 dB/µV Signal Noise S/N υi = 74dBµV 48 55 – dB υo υi = 74dBµV 40 60 90 mVrms THD υi = 126dBµV – 0.4 3 % Detector Voltage Out Total Harmonic Distortion Tuner Performance: (TA = +25°C, VCC = 13V, f = 1MHz, fmod. = 400Hz, MOD = 30%, RL = 10kΩ unless otherwise specified) Characteristics Maximum Sensitivity Usable Sensitivity (υi) Distortion Output Voltage Harmonic Distortion S/N Ratio Total Harmonic Distortion IF Rejection Ratio Image Rejection Ratio Selectivity AM Whistle Rejection Test Conditions υo = 20mVrms S/N = 20dB υi = 74 dBµV υi = 74dBµV υi = 74dBµV υi = 126dB f = 1MHz, υo = 20mV, IF = 450kHz f = 1MHz, υo = 20mV, f + 2 IF f = 1MHz, ∆f = ± 10kHz 2nd IF = 900kHz υi = 74dBµV 3rd IF = 1350kHz Pin Connection Diagram 14 VCC Mixer Output 1 IF Input 2 13 OSC Output Bypass 3 12 OSC Input IF Output 4 11 Mixer Input AGC Input 5 10 RF Output Bypass 6 9 Bypass GND 7 8 RF Input 14 8 1 7 .785 (19.95) Max .300 (7.62) .200 (5.08) Max .100 (2.45) .600 (15.24) .099 (2.5) Min Typ Unit 10 24 60 0.4 55 0.4 67 80 31 45 dBµV dBµV mVrms % dB % dB dB dB dB 50 dB