NTE1490 Integrated Circuit FM/AM Radio Receiver System 16−Lead DIP Features: D Stability is improved by use of the full balance DC feedback type differential IF amplifier D High sensitivity (Input limiting sensitivity is 32dBμ) D Large detection output (450mVrms typ, 100% mod.) D Utilizing the external resistance it can be changed freely D High S/N (77dBμ) D Wide operation supply voltage Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36.4mA Power Dissipation, PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450mW Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +125°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit − 24.7 36.4 mA 285 450 600 mVrms 50μs, de−emphasis − 0.3 1.0 % −3dB point − 32 37.5 dBμ FM Characteristics Quiescent Current Recovered AF Voltage Total Harmonic Distortion Limiting Sensitivity lo eo1 THD Vin(lim) 106dBμ, RL = 20k Signal to Noise Ratio S/N 106dBμ compared with eO1 67 77 − dB AM Rejection Ratio AMR 106dBμ AM out as compared with eO1 35 50 − dB Signal Meter Output VM 1.34 1.60 1.86 VDC 80 110 160 mVrms 74dBμ − 0.3 2.0 % eo2 = 10mVrms − 31 37 dBμ 74dBμ compared with eO2 − 55 − dB 106dBμ AM Characteristics Recovered AF Voltage eO2 Total Harmonic Distortion THD Usualy Sensitivity Signal to Noise Ratio FM: AM: SIF S/N2 fc = 10.7MHz, fm = 400Hz, ΔF = 75kHz Div fc = 455kHz, fm = 400Hz, 30% MOD Pin Connection Diagram IF Input (FM) 1 16 IF Input (AM) AC GND (FM) 2 15 Ref Bias (AM) DC Bias (FM) 3 14 AC GND (AM) 13 IF Output (AM) AGC Input (AM) FM VCC 4 NTE1490 GND 5 12 Audio Output (AM) 6 11 Det Input 7 10 FM Meter Output IF Output (FM) 8 9 GND 16 VCC 9 .260 (6.6) Max 1 8 .785 (19.9) Max .300 (7.62) .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7)