< Back 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

MONOLITHIC DUAL, NPN TRANSISTOR < Back IT120 Series MONOLITHIC DUAL, NPN TRANSISTOR Previous Next

TIGHTLY MATCHED, MONOLITHIC DUAL, NPN TRANSISTOR < Back LS310 Series TIGHTLY MATCHED, MONOLITHIC DUAL, NPN TRANSISTOR Previous Next

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back LSK389 Series LOW NOISE, MONOLITHIC DUAL, N-CHANNEL JFET T he LSK389A, B, C and D grades of high performance monolithic dual JFETs feature extremely low noise, tight offset voltage and low drift over temperature specifications, and is targeted for use in a wide range of precision instrumentation applications. This series has a wide selection of offset and drift specifications. This high-performance, ultra-low-noise dual N-Channel JFET amplifier is the only 100-percent noise tested JFET available and provides the optimal balance between very low noise (en =1.3nV/√Hz) and input capacitance (Ciss = 25pF). Available in TO-71 6L, SOIC 8L, as well as die form. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, Mosfet, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard data sheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: LSK389A TO-71 6L RoHS LSK389B TO-71 6L RoHS LSK389C TO-71 6L RoHS LSK389D TO-71 6L RoHS LSK389A SOIC 8L RoHS LSK389B SOIC 8L RoHS LSK389C SOIC 8L RoHS LSK389D SOIC 8L RoHS LSK389A Die LSK389B Die LSK389C Die LSK389D Die Datasheet Spice Model Application Notes

MONOLITHIC DUAL, NPN TRANSISTOR < Back IT120 Series MONOLITHIC DUAL, NPN TRANSISTOR The IT120 Series Monolithic Dual, NPN Transistor is a direct replacement for the Intersil IT120 Series. It is ideal for Small Signal Transistor Amplifier & Switching Applications. It is available the in TO-71 6L RoHS, TO-78 6L RoHS, PDIP 8L ROHS and SOIC 8L RoHS package, as well as bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information: All Part Numbers within this Product Series IT120A PDIP 8L RoHS IT120 PDIP 8L RoHS IT121 PDIP 8L RoHS IT122 PDIP 8L RoHS IT120A SOIC 8L RoHS IT120 SOIC 8L RoHS IT121 SOIC 8L RoHS IT122 SOIC 8L RoHS IT120A Die IT120 Die IT121 Die IT122 Die Datasheet Spice Model Application Notes

2N5018 SERIES LOW ON-RESISTANCE, P-CHANNEL JFET SWITCH < Back 2N5018 Series 2N5018 SERIES LOW ON-RESISTANCE, P-CHANNEL JFET SWITCH The 2N5018 Series Low On-Resistance, P-channel JFET Switch is a direct replacement for the Intersil and Siliconix-Vishay part series. It is ideal for low resistance switching applications. Available in the TO-18 3L ROHS package, as well as in die form. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information: Below are the options you have when ordering this part series: 2N5018 TO-18 3L RoHS 2N5019 TO-18 3L RoHS Datasheet Spice Model Application Notes

SINGLE, LOW CAPACITANCE, ULTRA-HIGH INPUT IMPEDANCE N-CHANNEL JFET AMPLIFIER - DFN < Back 4117DFN SERIES SINGLE, LOW CAPACITANCE, ULTRA-HIGH INPUT IMPEDANCE N-CHANNEL JFET AMPLIFIER - DFN The 2N/PN/SST4117 Series Single, Low Capacitance, Ultra-High Input Impedance, N-Channel JFET Amplifier is a direct replacement for the Fairchild, NXP and Siliconix-Vishay equivalent part series. It is ideal for high input impedance applications. This series is available in the DFN 8L RoHS miniature/non/magnetic package, as well as the TO-72 4L RoHS, TO-92 3L RoHS, SOT-23 3L RoHS package and bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: 2N4117 TO-72 4L RoHS 2N4118 TO-72 4L RoHS 2N4119 TO-72 4L RoHS PN4117 TO-92 3L RoHS PN4118 TO-92 3L RoHS PN4119 TO-92 3L RoHS SST4117 SOT-23 3L RoHS SST4118 SOT-23 3L RoHS SST4119 SOT-23 3L RoHS 2N4117 Die 2N4118 Die 2N4119 Die Datasheet Spice Model Application Notes

< Back DMOS App Note Introduction This Application Note describes in detail the principle of operation of the SD210/5000 series of high-speed analog switches and switch arrays. It contains an explanation of the most important switch characteristics, application examples, test data, and other application hints. Read More

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back 2N5564 Series LOW NOISE, MONOLITHIC DUAL, N-CHANNEL JFET The 2N5564 Series is a Low Noise, Monolithic Dual, N-Channel JFET. These matched pairs of JFETs are mounted in a TO-71 package. The two-chip design reduces parasitics for good performance at high frequency while ensuring extremely tight matching. This series features high breakdown voltage, high gain, and <5 mV offset between the two die. It is a Pin-for-Pin Replacement for Siliconix-Vishay 2N5564 Series, available in the TO-71 6L RoHS package, as well as bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: 2N5564 TO-71 6L RoHS 2N5565 TO-71 6L RoHS 2N5566 TO-71 6L RoHS 2N5564 Die 2N5565 Die 2N5566 Die Datasheet Spice Model Application Notes

< Back Military Sensor Signal Chains Introduction Higher-performance sensors are becoming increasingly important to modern battlefield systems. Sensors ranging from sonobuoys to radiation detectors are critical, leading-edge components of C4ISR systems. Better sensor systems enable earlier threat detection and more effective countermeasures. Military systems employ a wide range of sensors – nuclear, biological, and chemical sensing, infrared, electro-optical, laser, radar, and acoustical – that all have one aspect in common: the requirement for ultra-low-noise signal chains to produce the best possible sensor signal. Less-than-optimal front-end amplification means C4ISR clients receive inadequate information and are not able to make effective, real-time decisions. This paper describes techniques to employ to create the lowest-noise, most effect front-end amplification for sensor signal chains. Advanced lithography design and fab process techniques enable the creation of discrete components uniquely capable of performing the critical initial amplification of sensor signals. Integrated circuits contain a wide range of components and can include specialized design features that preclude design optimization for low noise. As this paper documents, ultra-low-noise discrete components added to an IC-based circuit will produce the lowest-noise signal chain. Though this paper focuses on the LSK489 dual monolithic Nchannel JFET, many other Linear Systems parts -- including the LSK389, LSK170 and LSK189 -- also are excellent sensor system components. Linear Systems is the world leader in ultra-low-noise monolithic dual JFETs and other front-end discrete components key to high-performance sensing systems. For over three decades, Linear Systems has led the development of this class of devices, and it continues to advance their design and introduce new sensor-specific parts. Read More

SINGLE, LOW-NOISE, LOW-LEAKAGE, N-CHANNEL JFET AMPLIFIERS < Back LSK189 SINGLE, LOW-NOISE, LOW-LEAKAGE, N-CHANNEL JFET AMPLIFIERS The LSK189 Single, Low Noise, Low Leakage, N-Channel JFET Amplifiers is a single version of LSK489 Series. It is ideal for Ultra Low Noise Audio/Acoustic Applications. Available in TO-92 3L ROoHS, SOT-23 3L RoHS package, as well as in die form. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: LSK189 TO-92 3L RoHS LSK189 SOT-23 3L RoHS LSK189 Die Datasheet Spice Model Application Notes

< Back LSK489 Press Release Linear Systems Mar 17, 2023 Low-Capacitance Dual N-Channel JFET NEWS RELEASE FOR INFORMATION CONTACT: Linear Systems, Inc. Sales Department Phone: (510) 490-9160 Email: sales@linearsystems.com Linear Systems Announces the Availability of the LSK489 Low-Noise, Low-Capacitance Dual N-Ch JFET Designed for All (Audio & Non-Audio) Low-Noise Applications FREMONT, CALIFORNIA – December 10, 2012 – Linear Systems, a leading full-service manufacturer of specialty linear semiconductors, announces the immediate availability of its LSK489 1.8 nV/√Hz @ 1kHz, low-capacitance, N-Channel Monolithic Dual JFET. This is part of a family of ultra-low-noise dual JFETs specifically designed to provide users with better-performing, less-time-consuming, and cost-effective solutions for obtaining tighter IDSS matching and better thermal tracking than matching individual JFETs. Available in surface-mount and RoHS-compliant versions, the LSK489 is an ideal improved functional replacement for similar JFETs with inferior noise characteristics and higher gate-to-drain capacitance, making it suitable for space-limited circuits in audio and instrumentation applications. The LSK489 offers designers a significant increase in capabilities for a wide range of low-noise applications. Its lower capacitance, 4pF compared to 25pF in similar products, enables simpler circuit designs without the need for a cascode configuration, which can introduce higher circuit noise. Like the LSK389, the LSK489 features a unique design construction of interleaving both JFETs on the same piece of silicon, providing excellent matching, thermal tracking, and nearly zero popcorn noise. The LSK489 is available in surface-mount SOIC-8, thru-hole TO-71, and smaller SOT23-6 packages. Lead-free, RoHS-compliant versions are available. Linear Systems' domestic factory stock guarantees short lead times, ensuring no disruption in production schedules. Summary of Features: - Low Noise (typically 1.8 nV/√Hz @ 1kHz) - Nearly Zero Popcorn Noise - IDSS matching to 10% max - Low Offset/Tight Matching (|Vgs1 - Vgs2| = 20mV max) - Low Capacitance (CISS = 4pF) - High Input Impedance - High Breakdown Voltage (BVGSS = 40V Min) - Low-noise, reduced device count alternative for the classic Dual JFET Cascode Configuration - Improved replacement for Siliconix U401 series and the Linear Systems 844 series - Available in surface-mount SOIC-8, smaller SOT23-6 packages - Lead-Free/RoHS Compliant versions available Applications: - Microphone amplifiers - Phono preamplifiers - Audio amplifiers and preamps - Discrete low-noise operational amplifiers - Battery-operated audio preamps - Audio mixer consoles - Acoustic sensors - Sonic imaging - Instrumentation amplifiers - Wideband differential amplifiers - High-speed comparators - Impedance converters Pricing and Availability: - Price: $5.38 each (1,000 pcs) - Availability: Sampling now in SOIC-8, TO-71, and SOT23-6 package options - Delivery: Factory Stock About Linear Systems Founded in 1987, Linear Systems is a full-service, privately-held designer and manufacturer of small-signal discrete semiconductors. The Fremont, CA-based company was founded by John H. Hall, co-founder of Intersil and founder of Micro Power Systems. Linear Systems' product line includes Ultra-Low-Noise N-Channel and P-Channel Dual and Single JFETs, High-Speed Lateral DMOS Switches, Bipolar Transistors, BIFET Amplifiers, Current-Regulating Diodes, Low-Leakage Diodes, and MOSFETs. Datasheets, application notes, SPICE models, and additional information can be downloaded at www.linearsystems.com. For more information, contact Linear Systems at sales@linearsystems.com or call (510) 490-9160.