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Welcome to our Literature page, where you can delve into a treasure trove of white papers and application notes covering our range of parts. Explore insights on ultra-low noise JFETs, DMOS, Current Regulating Diodes, JFET Switches, and low-leakage diodes, all designed to empower your understanding of our products. Literature Linear Systems offers an extensive library of technical resources tailored for analog circuit designers. Our collection includes detailed data books, product selection guides, cross-references, datasheets, original application notes, and white papers. This comprehensive literature serves as an invaluable reference for engineers, students, and hobbyists seeking to optimize their signal chain designs. By providing in-depth insights into small-signal discrete semiconductors and JFET applications, our materials empower you to create efficient and innovative analog circuits. Explore our resources to enhance your design process and stay at the forefront of analog technology. Datasheets Linear Systems provides detailed datasheets summarizing our components’ performance in ways to assist designers seeking to find the right part quickly. Our data sheets include typical/minimum/maximum performance data, along with an array of curves illustrating part performance so designers understand how these devices will contribute to overall system performance. Cross Reference Linear Systems continues to produce a wide range of JFET, DMOS and other standard products also previously manufactured by Siliconix, Fairchild and other companies. This cross reference provides buyers with a tool to quickly find replacements for discontinued standard products. Application Notes Linear Systems has a wide range of application notes written by top industry professionals to assist designers in making optimal use of our components in their products.

< Back FETs for Sensor Applications Introduction Linear Systems provides a variety of FETs (Field Effect Transistors) suitable for use in low noise amplifier applications for photo diodes, accelerometers, transducers, and other types of sensors. In particular, low noise JFETs exhibit low input gate currents that are desirable when working with high impedance devices at the input or with high value feedback resistors (e.g., ≥1MΩ). Operational amplifiers (op amps) with bipolar transistor input stages have much higher input noise currents than FETs. In general, many op amps have a combination of higher noise and input capacitance when compared to some discrete FETs. For example, a typical FET input op amp may have input capacitances of about 20 pF, whereas many discrete FETs have input capacitances of less than 5 pF. Also, there are few low noise FET input op amps that have equivalent input noise voltages density of less than 4 nV/ 𝐻𝑧. However, there are a number of discrete FETs rated at ≤ 2 nV/ 𝐻𝑧 in terms of equivalent Input noise voltage density. For those op amps that are rated as low noise, normally the input stages use bipolar transistors that generate much greater noise currents at the input terminals than FETs. These noise currents flowing into high impedances form added (random) noise voltages that are often much greater than the equivalent input noise. Read More

< Back BIFET Amplifiers Linear Systems Sep 26, 2024 BIFET amplifiers are a type of operational amplifier (op-amp) that use bipolar junction field-effect transistors (BJFETs) as their input stage. Introduction BIFET amplifiers are a type of operational amplifier (op-amp) that use bipolar junction field-effect transistors (BJFETs) as their input stage. These types of amplifiers have been popular for many years because they offer low bias currents, high input impedance and excellent linearity. In this article, we will discuss the key features of BIFET amplifiers, how they differ from other op-amps, and some common applications where they are used. What is a BIFET Amplifier? As mentioned earlier, BIFET amplifiers use BJFETs as their input stage instead of traditional MOSFETs or BJTs. BJFETs are known for their high input impedance and low noise, making them suitable for use in audio amplifiers and other sensitive applications. One of the main advantages of BIFET amplifiers is their low bias currents, which can be as low as a few femtoamps (10^-15 amps). This allows for higher precision in measuring small signals without introducing additional error. How do BIFET Amplifiers Differ from Other Op-Amps? BIFET amplifiers have several key differences compared to traditional op-amps. These include: Input Stage: As mentioned earlier, BIFET amplifiers use BJFETs instead of MOSFETs or BJTs as their input stage. This allows for higher input impedance and lower bias currents. Biasing: BIFET amplifiers typically use a single positive power supply, unlike other op-amps which may require dual supplies. This makes them more convenient to use in certain applications. Output Stage: The output stage of a BIFET amplifier is usually a MOSFET or BJT, providing high output current and low output impedance. This allows for driving larger loads without significant signal loss. Applications of BIFET Amplifiers BIFET amplifiers are commonly used in audio applications due to their low noise and high linearity. They are also popular in medical and scientific instrumentation where precision measurements are required. Other applications of BIFET amplifiers include: Sensor Signal Conditioning: The high input impedance and low bias currents make BIFET amplifiers ideal for conditioning signals from sensors such as thermocouples, strain gauges, and photodiodes. Active Filters: BIFET amplifiers can be used to create active filters with better performance compared to traditional op-amps. They also have lower power consumption, making them suitable for battery-powered applications. Data Acquisition Systems: BIFET amplifiers are commonly used in data acquisition systems due to their low noise and high precision. They can amplify small signals from sensors before being digitized for processing. Conclusion BIFET amplifiers offer several advantages over traditional op-amps, making them suitable for a variety of applications. They provide high input impedance, low bias currents, and high output current capabilities. These features make BIFET amplifiers ideal for use in audio, sensor signal conditioning, active filters, and data acquisition systems. As technology continues to advance, we may see further improvements in BIFET amplifier design and their application in various industries. So, it is important to stay updated with the latest developments in this field to fully utilize the potential of BIFET amplifiers.

< Back High Temp Products Linear Systems Mar 17, 2023 High Temp Discrete Products High Temperature Product Capability Original Post: https://www.prnewswire.com/news-releases/linear-systems-to-showcase-high-temperature-product-capability-at-the-offshore-technology-conference-2019-300839508.html FREMONT, Calif., April 29, 2019 /PRNewswire/ -- Linear Integrated Systems, Inc. (Linear Systems) will be showcasing its High Temperature Products capability at the Trendsetter Electronics Booth #4728 , at the Offshore Technology Conference (OTC) being held May 7 through May 9 at the NGR Park, Houston, Texas. These High Temperature Discrete Products enable designers to create custom discrete operational amplifiers when seeking a solution to improve the performance of their applications, when off the shelve operational amplifiers are not good enough. The Linear Systems' JFET product line is one of the largest in the industry and continues to expand. The unique Linear Systems' monolithic dual construction allows for two JFETs to be located on one piece of silicon, as compared to two individual pieces of silicon. The result is improved room temperature matching as well as improved matching/tracking over high temperature. Linear Systems' JFETs are available in various types: Ultra Low Noise (1.9nv-typ), High Impedance, Pico Amp Leakage, and High Frequency. The JFET product line includes both N-Channel Monolithic Duals and Singles and P-Channel Monolithic Duals and Singles for Amplifier and Switching Applications. Linear Systems will be available to discuss this capability and its line of precision small-signal discrete components at the OTC event. The event showcases offshore drilling, exploration, production and environmental protection manufacturers. Linear Systems specializes in the development and manufacture of precision, ultra-low-noise small-signal discrete components. Its parts, such as the LSK389 and LSK489, are used in highly demanding sensor systems ranging from the Large-Scale Synoptic Telescope to piezoelectric devices to sonobuoys. These parts also provide the front-end amplification for down hole, high-end test and measurement, sensor, medical and professional audio equipment. Linear Systems is a full-service, privately-held, 32-year-old 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 consists of: Ultra-Low-Noise JFETs: N-Channel and P-Channel Monolithic Dual and Single, High-Speed Lateral DMOS Switches, Bipolar Transistors : Monolithic Dual and Single, BIFET Amplifiers, Current-Regulating Diodes, Pico Amp-Leakage Diodes, MOSFETs: N-Channel and P-Channel Monolithic Dual and Single, PhotoFETS, and Voltage Controlled Resistors. Data sheets, application notes, SPICE models and other information can be downloaded at linearsystems.com . For more information about Linear Systems please contact Ms. Laura Madonna at laura@linearsystems.com . For customer service, please contact Linear Systems at sales@linearsystems.com or call (510) 490-9160. SOURCE Linear Integrated Systems Related Links www.linearsystems.com

MONOLITHIC DUAL, NPN TRANSISTOR < Back IT124 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 LS5911 Series WIDEBAND, HIGH GAIN, MONOLITHIC DUAL, N-CHANNEL JFET The LS5911 Series is a Wideband, High Gain, Monolithic Dual, N-Channel JFET. These parts are pin-for-pin replacements for Fairchild, Motorola, National, and Siliconix-Vishay 2N5911 Series. All dual devices are available in TO-71 6L, TO-78 7L, PDIP 8L, SOIC 8L and SOT-23 6L packages, 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: LS5911 TO-71 6L RoHS LS5912 TO-71 6L RoHS LS5912C TO-71 6L RoHS 2N5911 TO-71 6L RoHS 2N5912 TO-71 6L RoHS 2N5912C TO-71 6L RoHS LS5911 TO-78 7L RoHS LS5912 TO-78 7L RoHS LS5912C TO-78 7L RoHS 2N5911 TO-78 7L RoHS 2N5912 TO-78 7L RoHS 2N5912C TO-78 7L RoHS LS5911 PDIP 8L RoHS LS5912 PDIP 8L RoHS LS5912C PDIP 8L RoHS LS5911 SOIC 8L RoHS LS5912 SOIC 8L RoHS LS5912C SOIC 8L RoHS LS5911 SOT-23 6L RoHS LS5912 SOT-23 6L RoHS LS5912C SOT-23 6L RoHS LS5911 Die LS5912 Die LS5912C Die Datasheet Spice Model Application Notes

< Back Linear Systems Capabilities Statement Linear Systems Jun 3, 2024 Who we are and what we do Founded in 1987, Linear Systems is a U.S.-owned, U.S.-based precision discrete semiconductor company. We specialize in developing and manufacturing high-quality, small-signal discrete devices for a variety of high-end applications, including test/measurement, instrumentation, space, military, medical, audio, and sensors. With a wide range of proprietary and standard components, we are committed to providing top-tier solutions to meet the demands of our diverse clientele. Download our Capabilities Statement to read the full document and discover how Linear Systems can meet your semiconductor needs. 2024 Capabilities Statement .pdf Download PDF • 378KB

< Back Mike Ansberry: VP of Manufacturing and General Manager Linear Systems Jan 13, 2025 Mike Ansberry Named VP of Manufacturing and General Manager at Linear Systems FOR IMMEDIATE RELEASEContact: Sales@linearsystems.com Phone: (510) 490-9160Website: www.linearsystems.com ANSBERRY NAMED VP OF MANUFACTURING AND GENERAL MANAGER AT LINEAR INTEGRATED SYSTEMS FREMONT, CA – January 13, 2025 – Linear Integrated Systems, Inc. , is excited to announce the promotion of Michael Ansberry to Vice President of Manufacturing and General Manager. Ansberry will oversee all aspects of the company’s semiconductor fabrication operations, driving strategy, innovation, and efficiency across the organization. In this expanded role, Ansberry will lead the development of strategies to select, allocate resources, and prioritize fabrication partners and vendors. He will conduct periodic SWOT analyses to ensure alignment with the company’s goals and reallocate projects based on agreed-upon metrics. Additionally, he will prioritize New Product Introduction (NPI) efforts, assigning resources to support project success, while spearheading continuous improvement initiatives to meet Linear Systems’ financial objectives. Ansberry joined Linear Systems in 2018 as Vice President of Manufacturing, bringing extensive experience in semiconductor operations. His new responsibilities as General Manager reflect his outstanding contributions and leadership. Before joining Linear Systems, Ansberry served as Director of Operations at Lumileds, a global leader in LED technology for automotive, general, and specialty lighting applications. His career also includes process engineering roles at Sipex, Micro Power Systems, and other Silicon Valley semiconductor companies, showcasing a deep understanding of both operations and engineering. “This new role is an exciting opportunity to help Linear Systems reach new heights,” said Ansberry. “I’m looking forward to strengthening our relationships with fabrication partners, streamlining operations, and continuing to deliver the world-class semiconductors our customers rely on.” Linear Systems CEO Cindy L. Johnson expressed confidence in Ansberry’s expanded role. “Mike has proven himself to be an invaluable leader in our organization. His extensive experience and dedication to excellence have been pivotal to our success. In his new role, I’m confident Mike will continue to drive innovation and operational efficiency.” Founded in 1987 by John M. Hall, Cindy L. Johnson, and John H. Hall, Linear Integrated Systems, Inc. is a privately held designer and manufacturer of small-signal discrete semiconductors based in Fremont, CA. John H. Hall, a co-founder of Intersil and the founder of Micro Power Systems, brought significant expertise and innovation to the company. Linear Systems offers a diverse product line, including Dual JFET Amplifiers , Single JFET Amplifiers , JFET Switches , DMOS High Speed Switches , Low Leakage Diodes , Current Regulating Diodes , Bipolar Transistors , MOSFETs , Voltage Controlled Resistors and BIFET Amplifiers . Visit www.linearsystems.com to download our 2024 Data Book , Cross Reference Guide , datasheets, SPICE models, application notes , and more. Stay connected and join our growing LinkedIn community for updates and insights. You can also follow us on YouTube , Facebook , Instagram and X . Contact: sales@linearsystems.com Phone: (510) 490-9160 Website: www.linearsystems.com

SINGLE P-CHANNEL JFET SWITCH < Back LSJ/SST94 SINGLE P-CHANNEL JFET SWITCH The LSJ/SST94 Single, Ultra-Low noise, P-Channel JFET Amplifier is a direct replacement for the Toshiba 2SJ94. It is ideal for Ultra-Low Noise Audio/Acoustic Applications. Available in the TO-92 3L RoHS, SOT-89 3L RoHS, 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: LSJ94 TO-92 3L RoHS SST94 SOT-23 3L RoHS LSJ94 Die Datasheet Spice Model Application Notes

LOW NOISE N-CHANNEL JFET GENERAL PURPOSE AMPLIFIER < Back J/SST210 Series LOW NOISE N-CHANNEL JFET GENERAL PURPOSE AMPLIFIER The J/SST210 Series Single, Low Noise, N-Channel JFET, General Purpose Amplifier is a direct replacement for Fairchild, NXP and Siliconix-Vishay equivalent part. It is ideal for General Purpose and Low Noise Applications. Available in the TO-92 3L RoHS, SOT-23 3L RoHS package, as well as 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: J210 TO-92 3L RoHS J211 TO-92 3L RoHS J212 TO-92 3L RoHS SST210 SOT-23 3L RoHS SST211 SOT-23 3L RoHS SST212 SOT-23 3L RoHS J210 Die J211 Die J212 Die Datasheet Spice Model Application Notes

SD5000 SERIES QUAD, HIGH SPEED N-CHANNEL, LATERAL DMOS FET SWITCH < Back SD5000 Series SD5000 SERIES QUAD, HIGH SPEED N-CHANNEL, LATERAL DMOS FET SWITCH The SD5000 is a Quad, High Speed N-Channel, Lateral DMOS FET Switch with Zener Diode Protection, ideal for Ultra-High Speed Switching Applications. Linear Systems acquired the Siliconix Lateral DMOS FET Switch Product Line, so our parts are the same maskset, process and are an exact pin-for-pin replacement. This series is available in the PDIP 16L RoHS, SOIC 14L RoHS and S/B DIP 16L 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: SD5000I PDIP 16L RoHS SD5000N PDIP 16L RoHS SD5001N PDIP 16L RoHS SD5400CY SOIC 14L RoHS SD5401CY SOIC 14L RoHS SD5000I S/B DIP 16L RoHS SD5000 Die SD5001 Die SD5400 Die SD5401 Die Datasheet Spice Model Applicaton Notes

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