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| NTE1488 Integrated Circuit FM IF Amp, Demod w/Muting, Center Meter and Signal Meter Features: D Low Distortion D High Signal-to-Noise Ratio D High Limiting Sensitivity D Large Muting Attenuation D Provides Specific Signal for Direct Drive of a Signal Meter with Good Linearity D Muting Level is Variable by Adjusting the External Resistor D Hig Stability Against Abnormal Oscillation Applications: D FM IF Amplifier D Quadrature Detector D Audio Amplifier D Muting Circuit D AFC, Tuning Meter Driver D AGC Control Voltage Generator D Muting Control Voltage Generator D Signal Meter Driver Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14V Power Dissipation (TA = +60C), PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +60C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125C Electrical Characteristics: (TA = +25C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Static (DC) Characteristics (VCC = 13V, No Signal) Pin1 Voltage Pin2 Voltage Pin3 Voltage Pin6 Voltage Pin7 Voltage Pin10 Voltage V1 V2 V3 V6 V7 V10 - - - - - - 1.95 1.95 1.95 5.60 5.60 5.60 - - - - - - V V V V V V Electrical Characteristics (Cont'd): (TA = +25C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit AC Characteristics (VCC = 13V, fc = 10.7MHz, fm = 400Hz, f = 75kHz) Supply Current Limiting Sensitivity Reversed AF Voltage Total Harmonic Distortion Signal-to-Noise Ratio AM Rejection Ratio Muting Attenuation ICC Vin(lim) VO(AF) THD S/N AMR Mute(Att) Vin = 0dB, Pin16 to GND Open Vin = 100dB Input, Input Level = 3dB from VO(AF) Vin = 100dB Vin = 100dB Vin = 100dB Vin = 100dB, AM: fin = 1kHz, Mod. 30% Vin = 100dB, Output standard with Pin5 Open, Attenuation with 2V impressed to Pin5 Vin = 100dB, Sum of + and f for V12 = 1.4V No muting level adjustment (Pin16 Open) input level for V12 = 1.4V 16 - 265 - 78 45 70 25 31 380 0.03 84 54 85 33 37 510 0.10 - - - mA dB mVrms % dB dB dB Muting Bandwidth Muting Sensitivity Muting Sensitivity Adjustment Range Meter Drive Voltage BW (Mute) Vin (Mute) 55 36 75 - 0.9 4.7 - 105 44 - 0 1.45 5.2 4.3 145 60 - - - - - kHz dB dB V V V V AVin (Mute) Max. input level with possible muting level adjustment, Note 1 V13-0 V13-70 V13-100 Vin = 0dB, Pin13 Voltage Vin = 70dB, Pin13 Voltage Vin = 100dB, Pin13 Voltage Vin = 80dB, Pin15 Voltage AGC Control Voltage V15 Note 1. Muting level can be adjusted up to 75dB and should be set within this range. Pin Connection Diagram Input AM/FM Switch Bypass GND Mute Input Audio Output AFC Output Quad Det 1 2 3 4 5 6 7 8 16 Mute Adjust 15 RF AGC 14 GND 13 Meter Driver 12 Mute Output 11 VCC 10 Det Tank 9 Det Tank 16 9 .260 (6.6) Max 1 8 .785 (19.9) Max .200 (5.08) Max .245 (6.22) Min .300 (7.62) .100 (2.54) .700 (17.7) |
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