FM / TV front end
Audio ICs
FM / TV front end
BA4424N
The BA4424N is a monolithic IC designed for FM front end use. It consists of an RF ...
Description
Audio ICs
FM / TV front end
BA4424N
The BA4424N is a monolithic IC designed for FM front end use. It consists of an RF amplifier circuit, mixer circuit, local oscillation circuit, IF buffer amplifier, and a variable capacitor-diode for AFC.
FFeatures 1) An RF amplifier, mixer, local oscillator, IF buffer amplifier, and AFC diode are included on-chip. 2) Reception of VHF terrestrial TV channels is possible. 3) Uses a double balance mixer to improve intermodulation characteristics. 4) Includes a clamp diode in the mixer output. 5) Local oscillation buffer on-chip for improved response to strong input. 6) The output impedance of the IF buffer amplifier is matched with the ceramic filter impedance at 330Ω. FAbsolute maximum ratings (Ta = 25_C)
7) A resistive load can also be used for the mixer output. 8) Mixer input coupling capacitor included on-chip. 9) Includes a feedback capacitor for the local oscillation circuit. 10) Compact 9-pin SIP package. Pins arranged for convenient mounting.
FRecommended operating conditions (Ta = 25_C)
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Audio ICs
FBlock diagram
BA4424N
FElectrical characteristics DC characteristics (unless otherwise noted, Ta = 25_C, VCC = 4V, no input)
AC characteristics (unless otherwise noted, Ta = 25_C and VCC = 4V)
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Audio ICs
FMeasurement circuit
BA4424N
FPin connections 1 FM ANT input pin
2 3 4 5
: Connect to BPF ZIN = 75Ω RF amplifier bypass pin : Connect to bypass capacitor RF amplifier output load pin : Connect to RF tuning circuit MIX out...
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