FM / TV front end BA4425F Audio ICs

FM / TV front end BA4425F Audio ICs
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
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