NTE1525 Integrated Circuit FM IF Amplifier Features: D Three Stage Differential IF Amplifier D Differential Peak Detector D Muting Circuit D Signal Meter Drive Circuit D High Recovered Output Voltage: VOD = 500mVrms (Typ) D Low Distortion: THD = 0.1% (Typ) D Wide Operating Supply Voltage Range: VCC = 8V to 15V (Typ) D Signal Meter Drive Voltage: V3 = 4V (Typ) D Variable Muting Point D Muting Off at Open Terminal D Simplified Single Coil Tuning Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW Derate above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4mW/°C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25° to +75°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +150°C Electrical Characteristics: (VCC = 12V, f = 10.7MHz, fm = 400Hz, TA = +25°C unless otherwise specified) Parameter Supply Current Input Limiting Voltage Symbol ICC VIN (lim) Test Conditions Min Typ Max Unit VIN = 0 10 14 18 mA F = ±75kHz dev. −3dB Limiting − 50 55 dBµV − 50 − dB 300 500 700 mVrms AM Rejection Ratio AMR FM: F = ±75kHz dev. AM: 30% Mod. VIN = 80dBµV Recovered Output Voltage VOD F = ±75kHz dev. VIN = 80dBµV Total Harmonic Distortion THD F = ±22.5kHz dev. VIN = 80dBµV − 0.1 − % Signal−to−Noise Ratio S/N F = ±75kHz dev. VIN = 80dBµV − 75 − dB Muting Attenuation MA F = ±75kHz dev. VIN = 80dBµV, V4 = 0 − 70 − dB Electrical Characteristics (Cont’d): (VCC = 12V, f = 10.7MHz, fm = 400Hz, TA = +25°C unless otherwise specified) Parameter Symbol Meter Drive Voltage Test Conditions Min Typ Max Unit − 4 − V − 5 − kΩ − 4.5 − pF − 1.3 − kΩ − 4 − pF − 7.7 − kΩ V3 (Max) VIN = 110dBµV Parallel Input Resistance rip Parallel Input Capacitance cip Parallel Output Resistance rop Parallel Output Capacitence cop Output Resistance RO f = 10.7MHz, Pin1 − GND f = 10.7 MHz, Pin6 − GND f = 400Hz, Pin8 − GND Pin Connection Diagram (Front View) 9 VCC 8 AF Output 7 Detector Tank 6 Detector Tank 5 GND 4 Muting 3 Level Meter 2 Bypass 1 IF Input .126 (3.2) .323 (8.2) Max .100 (2.54) .906 (23.0) Max 1 9 .020 (0.5) .800 (20.3) .099 (2.5) Min