NTE1624 Integrated Circuit AM/FM Radio Circuit w/Power Amp Features: D Suitable for Use in AM/FM Portable Radios or Main–fed AM/FM Clock Radios. D Incorporates AM RF Amp, AM Local Oscillator, AM Mixer, AM/FM IF Amp, AM/FM Detector, AM AGC Circuit, FM AFC Circuit and B Class–Audio Power Amplifier. D Using the NTE1624, Plus the Discrete Input Stage (for FM: RF Amp and Converter), It is Possible to Construct a Complete AM/FM Radios Receivers. D Wide Operating Voltage Range: 3V to Approx 13V, Depending on the Internal Regulator Tolerance. D As the Internal Shunt Voltage Regulator Circuit is Connected to the Supply Voltage Terminal, it Permits a Constant Current Mode (Approximately 42mA) of Operation which is Desirable for Line–Operated Equipments. D AM to FM Switching is Accomplished by Switching Only DC Circuitry. Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11V Supply Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44mA Power Dissipation (TA ≤ +65°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600mW Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mW/°C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –18° to +65°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C Thermal Resistance, Junction–to–Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100°C/W Electrical Characteristics: (TA = +25°C, f(AM)= 1MHz, Mod=30%, f(FM)=10.7MHz ∆F=22.5kHz, fM=1KHz, VIN=SG Open Voltage –6dB unless otherwise specified) Parameter Quiescent Current Symbol ICCQ Test Conditions Min Typ Max Unit SW → FM, VCC = 3V 7 12 17 mA SW → FM, VCC = 9V 10 17 23 mA 2.0 2.4 3.1 V – 57 – dBµV SW1 → AM, ICC = 42mA 12.5 13.2 14.0 V SW1 → AM, VCC = 9V, No Signal 1.4 – 1.9 V Terminal Voltage (Pin16) V16(FM) SW1 → FM, ICC = 42mA, No Signal Limiting Voltage VIN(lim) SW → FM, VCC = 5.5V, –3dB, V16 = 2.4V, VR = Min Internal Regulated Voltage Terminal Voltage (Pin16) VCC V16(AM) Electrical Characteristics (Cont’d): Parameter (TA = +25°C, f(AM)= 1MHz, Mod=30%, f(FM)=10.7MHz ∆F=22.5kHz, fM=1KHz, VIN=SG Open Voltage –6dB unless otherwise specified) Symbol Test Conditions Min Typ Max Unit Maximum Sensitivity VO SW → AM, VCC = 12V, VIN = 37dB, SW → 45Ω, V16 = 1.4V 1.5 3.0 – V Quieting Sensitivity S/N SW1 → AM, VCC = 5.5V, SW → 8Ω, VIN = 37.5dB 15 20 – dB 0.28 – – W Output Power POUT SW → 8Ω, VCC = 5.5V, f = 1kHz, VH = Min., THD = 10% Total Harmonic Distortion THD SW → 45Ω, ICC = 42mA, f = 1kHz, VR = Min., VOUT = 2V – 0.5 4.0 % SW → 8Ω, VCC = 5.5V, f = 1kHz, VR = Min. – 40 – dB f = 455kHz – 200 – kΩ – 3.0 – pF – 30 – kΩ – 3.5 – pF – 300 – kΩ – 6.0 – pF – 50 – kΩ – 5.0 – pF Rip14 (AM) f = 455kHz – 300 – kΩ Cip14 (AM) – 3.5 – pF – 300 – kΩ Cip14 (FM) – 4.0 – pF Rop15 (AM) f = 455kHz – 300 – kΩ Cop15 (AM) – 5.5 – pF Rop15 (FM) f = 10.7MHz – 300 – kΩ Cop15 (FM) – 6.0 – pF Voltage Gain Pin2 Input Impedance (AM) GV Rip2 (AM) Cip2 (AM) Pin2 Input Impedance (FM) Rip2 (FM) f = 10.7MHz Cip2 (FM) Pin4 Output Impedance Rop4 f = 455kHz Cop4 Pin6 Input Impedance Rip6 f = 1MHz Cip6 Pin14 Input Impedance (AM) Pin14 Input Impedance (FM) Pin15 Output Impedance (AM) Pin15 Output Impedance (FM) Rip14 (FM) f = 10.7MHz Pin Connection Diagram IF Bypass 1 AM/FM IF Input 2 RF GND 3 AM IF Output 4 AM OSC 5 AM RF Input 6 RF Bypass 7 Audio Det Output 8 16 AGC Bypass 15 AM/FM IF Output 14 IF Det Input 13 VCC (+) 12 Audio Power Output 11 Audio GND 10 Ripple Rejection 9 Audio Power Input 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)