LSK389 Monolithic Dual N-Channel JFET Amplifiers Linear Integrated Systems LSK389 Monolithic Dual N-Channel JFET Amplifiers feature tight-offset voltage and remarkable stability over temperature. The Linear Integrated Systems LSK389 JFETs are designed to deliver performance in various applications. With a broad range of offset and drift specifications, select the optimal combination to meet exact requirements. The LSK389 series is 100% noise tested, balancing low noise and input capacitance.