LSK389 Press Release
Linear Systems
Mar 17, 2023
Ultra-Low Noise, Monolithic Dual, N-Channel JFET
NEWS RELEASE
FOR INFORMATION CONTACT:
Linear Systems, Inc.
Sales Department
Phone: (510) 490-9160
Email: sales@linearsystems.com
Industry’s First 100% Noise Tested, Ultra-Low Noise, Monolithic Dual, N-Channel JFET
FREMONT, CA – 01/21/2020 – Linear Systems announces the re-release of their most popular part, the LSK389 Series, Ultra-Low Noise, Monolithic Dual, N-Channel JFET, now 100% tested to meet or exceed noise specifications.
The LSK389 is the lowest noise Junction Field Effect Transistor (JFET) in its class and has been used in ultra-high-end applications for over a decade. The LSK389 enables developers to create the lowest noise signal chains possible for sensors, professional audio equipment, and other applications.
Linear Systems is releasing the LSK389 after developing the capability for individual screening of small-signal discrete components to levels below a billionth of a volt (nV/√Hz) of noise in quantities up to tens of thousands of parts. This testing capability – the only one in existence worldwide – ensures all LSK389s leaving the factory produce no burst (RTN or popcorn) noise and meet or exceed 1/f and broadband noise specifications.
The LSK389, Ultra-Low Noise, Monolithic Dual, N-Channel JFET provides designers with a better-performing solution for obtaining tighter IDSS matching and better thermal tracking than using individual JFETs or non-monolithic dual JFETs. The part is an ideal combination of high transconductance, ultra-low noise, and relatively low input capacitance.
The LSK389 is the lead part of Linear Systems’ family of low-noise JFETs. The LSK170 is the N-channel single version of the LSK389, and the LSJ74 is the P-channel counterpart to the LSK170. The N-channel dual LSK489 has slightly higher noise but lower input capacitance than the LSK389, and the LSJ689 is its P-channel dual counterpart. All Linear Systems’ JFET standard products have substantially lower noise than those made by other manufacturers and are marketed under the Improved Standard Products® trademark.
Summary of Features:
- Ultra-Low Noise: en = 1.3nV/√Hz (typ), f = 1.0kHz and NBW = 1.0Hz
- Four grades of IDSS: 2.6-6.5mA, 6.0-12.0mA, 10.0-20.0mA, and 17-30mA, with an IDSS match of 10%
- Tight Matching: IVGS1-2I = 15mV max
- High Breakdown Voltage: BVGSS = 40V max
- High Gain: Gfs = 20mS (typ)
- Relatively Low Capacitance: 25pF (typ)
- Available in surface mount SOIC 8L and thru-hole TO-71 6L packages
Benefits:
- Improved Signal Chain Noise Performance
- Better Matching and Thermal Tracking Due to Unique Monolithic Interleaved Dual Design Construction
- Better Performance for Battery-Operated Applications by Providing a Wide Output Swing
Applications:
- 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
Pricing and Availability:
- 1,000+ pieces of the LSK389A SOIC 8L package are priced at $4.67 (USD) each.
- 1,000+ pieces of the LSK389A TO-71 6L package are priced at $6.70 (USD) each. Prices vary based on grade (A, B, C, and D) and quantity.
-Availability: Production quantities are available now.
-Delivery: Factory stock to 8 weeks.
For more information:
Phone: (510) 490-9160
Email: sales@linearsystems.com
Website: www.linearsystems.com