KA2243 AM/FM IF Amplifier and Detector IC
EGP 20
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KA2243 AM/FM IF Amplifier and Detector IC The KA2243 is a highly integrated linear circuit for AM/FM intermediate-frequency (IF) signal processing in radio cassette tape recorders and home stereo systems. This monolithic IC consolidates critical functions for both AM and FM reception, including IF amplification, detection, automatic gain control (AGC), and signal metering. Features: Suitable for radio cassettes and home stereos. Wide operating supply voltage range of 3V to 14V. Low quiescent circuit current for extended battery life. AM section with IF amplifier, AGC, and detector. Simplified input circuit for ceramic filter type in AM section. Specifications: Parameter Value Supply Voltage Range 3V–14V Max Supply Voltage 16V Power Dissipation 600mW Operating Temperature –20°C–+70°C FM Quiescent Current 7mA–16.5mA (5.5V) AM Quiescent Current 8mA (5.5V) FM Limiting Sensitivity 33dBμ (typ) FM Detector Output 180mV–310mV (100dBμ) FM THD 0.3%–1.0% (100dBμ) FM AM Rejection 50dB–60dB FM S/N Ratio 72dB–83dB AM Detector Output 45mV–85mV (74dBμ) AM S/N Ratio 0.7%–3.5% (100dBμ) AM Input Impedance (Pin 16) 1.45kΩ–2.8kΩ Applications: Radio cassette tape recorders for IF amplification and detection. Modular stereos and home audio systems. Portable radio receivers requiring low power consumption. Tuner circuits in consumer electronics. AM/FM signal processing in battery-powered devices. Legacy radio system repairs and replacements. Package Include: 1x KA2243 AM/FM IF Amplifier and Detector IC. Datasheet: KA2243
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