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 = +60°C), PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +60°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 Static (DC) Characteristics (VCC = 13V, No Signal) Pin1 Voltage V1 – 1.95 – V Pin2 Voltage V2 – 1.95 – V Pin3 Voltage V3 – 1.95 – V Pin6 Voltage V6 – 5.60 – V Pin7 Voltage V7 – 5.60 – V Pin10 Voltage V10 – 5.60 – V Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Vin = 0dBµ, Pin16 to GND Open 16 25 33 mA – 31 37 dBµ AC Characteristics (VCC = 13V, fc = 10.7MHz, fm = 400Hz, ∆f = 75kHz) Supply Current ICC Limiting Sensitivity Vin(lim) Vin = 100dBµ Input, Input Level = 3dB from VO(AF) Reversed AF Voltage VO(AF) Vin = 100dBµ 265 380 510 mVrms Total Harmonic Distortion THD Vin = 100dBµ – 0.03 0.10 % Signal–to–Noise Ratio S/N Vin = 100dBµ 78 84 – dB AM Rejection Ratio AMR Vin = 100dBµ, AM: fin = 1kHz, Mod. 30% 45 54 – dB Muting Attenuation Mute(Att) Vin = 100dBµ, Output standard with Pin5 Open, Attenuation with 2V impressed to Pin5 70 85 – dB Muting Bandwidth BW (Mute) Vin = 100dBµ, Sum of + and ∆f for V12 = 1.4V 55 105 145 kHz Muting Sensitivity Vin (Mute) No muting level adjustment (Pin16 Open) input level for V12 = 1.4V 36 44 60 dBµ Muting Sensitivity Adjustment Range AVin (Mute) Max. input level with possible muting level adjustment, Note 1 75 – – dBµ Meter Drive Voltage AGC Control Voltage V13–0 Vin = 0dBµ, Pin13 Voltage – 0 – V V13–70 Vin = 70dBµ, Pin13 Voltage 0.9 1.45 – V V13–100 Vin = 100dBµ, Pin13 Voltage 4.7 5.2 – V V15 Vin = 80dBµ, Pin15 Voltage – 4.3 – V Note 1. Muting level can be adjusted up to 75dBµ and should be set within this range. Pin Connection Diagram Input 1 16 Mute Adjust AM/FM Switch 2 15 RF AGC Bypass 3 14 GND GND 4 13 Meter Driver Mute Input 5 12 Mute Output Audio Output 6 11 VCC AFC Output 7 10 Det Tank Quad Det 8 9 Det Tank 16 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)