The LF398 is a precision sample and hold amplifier which uses a combination of bipolar and junction FET transistors to provide precision, high speed, and long hold times. A typical offset voltage of 1 mV and gain error of 0.002% allow this sample and hold amplifier to be used in 12-bit systems. Dynamic performance can be optimized by proper selection of the external hold capacitor. Acquisition times cab be as low as 4uS for small capacitors while hold step and droop errors can be held below 0.1mV and 30uV/sec respectively when using larger capacitors.
