LSK489 Series N-Channel JFET

Linear Integrated Systems' LSK489 ultra-low-noise dual junction field effect transistor (JFET) is optimized for use in high-end sensor front-end amplification designs, with a common mode rejection ratio over 100 dB. It offers tight differential voltage match versus current, improved op amp speed settling time accuracy, minimum input error trimming error voltage, and lower intermodulation distortion due to low input capacitance. The LSK489A and LSK489B versions are graded by the IDSS range, the ungraded version is LSK489. The two halves of the dual are interwoven using a proprietary design for optimal matching characteristics.

* The LSK489 was selected by designers of the Rubin Observatory/Large-Scale Synoptic Telescope astronomical observatory, currently under construction in Chile, for its superior overall performance and high reliability. The images recorded by the observatory’s 3.2-gigapixel CCD imaging camera, the largest digital camera ever constructed, flow through 2,000 LSK489s comprising the project’s initial amplification circuit.