LF398采样保持器，由双极性绝缘栅场效应管组成，它具有采样速度快、保持下降速度慢、精度高等特点，采样时间小于6μs时精度可达O.01％；采用双极性输入状态可获得低偏置电压和宽频带；抗干扰能力强，不易受温度影响；芯片上的逻辑输入端均为具有低输入电流的差动输入，允许直接与TTL、PMOS和CMOS相连，差动门限为1.4 V，电源电压可在士5 V和±18 V之间变化．-LF398 sample and hold device, the insulated gate bipolar field effect transistor formed, it has a sampling speed, to keep down slow, high precision, when the sampling time is less than 6μs accuracy up to O.01　 with bipolar input state can achieve low offset voltage and wide bandwidth　anti-interference ability, easily affected by temperature　chip logic inputs are differential with low input current input, allowing direct and TTL, PMOS and CMOS linked differential threshold is 1.4 V, power supply voltage of ± 5 V and ± 18 V between the changes.