描述The LF444 quad low power operational amplifier provides many of the same AC characteristics as the industry standard LM148while greatly improving the DC characteristics of the LM148. The amplifier has the same bandwidth, slew rate, and gain (10kΩ load) as the LM148 and only draws one fourth the supply current of the LM148. In addition the well matched high voltageJFET input devices of the LF444 reduce the input bias and offset currents by a factor of 10,000 over the LM148. The LF444also has a very low equivalent input noise voltage for a low power amplifier.The LF444 is pin compatible with the LM148 allowing an immediate 4 times reduction in power drain in many applications. TheLF444 should be used wherever low power dissipation and good electrical characteristics are the major considerations.特性 ¼ supply current of a LM148:  250 μA/Amplifier (max)Low input bias current: 100 pA (max)High gain bandwidth: 1 MHzHigh slew rate: 1 V/μsLow noise voltage for low power  Low input noise current  High input impedance: 10 12ΩHigh gain, VO = ±10V, RL = 10KΩ: 25K (min)