Audio ICs FM / TV front end BA4425F The BA4425F is a monolithic IC designed for FM front end use. It consists of an RF amplifier circuit, mixer circuit, oscillation circuit, and IF buffer amplifier. Applications FM radios Radio cassette players Home stereos Headphone stereos Features 1) Uses double balance mixer to improve intermodulation characteristics. 2) Includes a clamp diode in the mixer output. 3) Local oscillation buffer on-chip for improved response to strong input. 4) The output impedance of the IF buffer is matched with the ceramic filter impedance at 330Ω. 5) Mixer input coupling capacitor included on-chip. 6) Includes a feedback capacitor for the local oscillation circuit. 7) Reception of VHF terrestrial TV channels is possible. 8) Compact SOP 8-pin package. Absolute maximum ratings (Ta = 25C) Recommended operating conditions (Ta = 25C) 67 Audio ICs Block diagram Pin descriptions Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 4.0V) 68 BA4425F Audio ICs BA4425F Measurement circuit 69 Audio ICs Component data 70 BA4425F Audio ICs BA4425F Electrical characteristic curves 71 Audio ICs External dimensions (Units: mm) 72 BA4425F