Ultra-low-noise dual N-channel JFET is 100% noise tested

February 17, 2020 //By Rich Pell
Ultra-low-noise dual N-channel JFET is 100% noise tested
Linear Integrated Systems (Fremont, CA) has announced the re-release of their most popular part - the LSK389 monolithic dual, N-channel JFET - now 100% tested to meet or exceed noise specifications.

The LSK389, says the company, is the lowest noise junction field effect transistor (JFET) in its class and enables developers to create the lowest noise signal chains possible for sensors, professional audio equipment, and other applications. The company is releasing the LSK389 after creating the capability for individual screening of small-signal discrete components to levels below a billionth of a volt (nV/vHz) of noise in quantities up to tens of thousands of parts.

This testing capability – claimed as the only one in existence worldwide – ensures that all LSK389s leaving the factory produce no burst (RTN or popcorn) noise and meet or exceed 1/f and broadband noise specifications.

"The LSK389 is the key to building the world's lowest-noise signal chains for many applications," says Linear Systems President Tim McCune. "Creating our new testing capability enables us to guarantee each part we ship meets our ultra-low noise spec, and that no manufacturer will ever have to scrap a circuit board because these parts didn't work correctly."

Benefits of the LSK389 are said to include improved signal chain noise performance; better matching and thermal tracking due to monolithic interleaved dual design construction; and better performance for battery operated applications by providing a wide output swing.

Applications include the following:

  • Ultra-sensitive sensor applications
  • Audio Amplifiers and Preamps
  • Discrete Low-Noise Operational Amplifiers
  • Battery-Operated Audio Preamps
  • Audio Mixer Consoles
  • Sonic Imaging
  • Instrumentation Amplifiers
  • Microphones
  • Sonobuoys
  • Hydrophones
  • Chemical and Radiation Detectors

The LSK389A in a SOIC 8L package is priced at $4.67 ea/1,000. 1,000+ pieces of the LSK389A TO-71 6L package is $6.70 each. Prices vary based on grade (A, B, C and D) and quantity.

Linear Integrated Systems


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