BF244A

The BF244A is an N-channel JFET RF amplifier from ON Semiconductor, designed for RF amplifier and mixer applications operating up to 450MHz and for analog switching requiring low capacitance. It is sourced from Process 50.

The device has a maximum drain-source voltage of 30V, a maximum gate-source voltage of -30V, a maximum drain current of 50mA, and a maximum forward gate current of 10mA. Total device dissipation is 350mW with a derating factor of 2.8mW/°C above 25°C. Thermal resistance is 125°C/W junction-to-case and 357°C/W junction-to-ambient. Storage temperature range is -55°C to 150°C.

Electrical characteristics at VDS=15V include zero-gate voltage drain current (IDSS) of 2.0 to 6.5mA for the A grade, and gate-source cutoff voltage (VGS(off)) of -0.5 to -8V. Forward transfer admittance is 3mmhos minimum at 1kHz and 5.6mmhos typical at 200MHz. Input capacitance is 3pF, reverse transfer capacitance 0.7pF, and output capacitance 0.9pF. Noise figure is 1.5dB typical at 100MHz, and cut-off frequency is 700MHz typical.

The BF244A is available in a TO-226-3, TO-92-3 (TO-226AA) through-hole package with supplier device package TO-92-3. It is suitable for RF amplification, mixing, and analog switching applications where low capacitance is required.