LA1844 - FM-AM HF Amplifiers - maxdat.eu
LA1844 - FM-AM HF Amplifiers - maxdat.eu
LA1844 - FM-AM HF Amplifiers - maxdat.eu
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Continued from preceding page.Pin No.FunctionPin voltage(V)<strong>LA1844</strong>,<strong>LA1844</strong>MEquivalent circuit21 <strong>AM</strong> RF input Vreg Must be used at the same potential as pin 22Notes22 AFC Vreg The <strong>FM</strong> SD bandwidth can be adjusted with theexternal resistor connected between this pin andpin 3 (REG)23 OSC V CC Connect the oscillator coil between this pin andpin 9 (V CC )Note: Impedance of the secondary oscillator coilmust be 5kΩ or higher.24 Oscillator bufferoutput,<strong>FM</strong> SD sensitivityadjustmentV CC -1.4The <strong>FM</strong> SD sensitivity can be adjusted with anexternal resistor connected to this pin.Output impedance R O = 200ΩNote: Resistance of the external resistorconnected to the pin 24 must be 3.3kΩor higher.No.7930A-8/11
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