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< Back Interfacing Sensors & Transducers Introduction Abstract: A discussion of methods of amplifying and signal-conditioning for sensors with low level outputs in the presence of high ambient electrical noise sources. Advantages and disadvantages of some common amplifier circuits are considered. Read More

< Back Low Leakage Diodes Introduction In circuit designs for sensor signal conditioning, the design engineer must protect the input section from over current and over voltage conditions. Op amps, ADC analog inputs, analog multiplexers, and [RS485] line receivers represent classes of devices that need protection. Often, the manufacturers of such devices specify the acceptable input range for voltage, or, in the case of an overvoltage condition, the allowable input current above which semiconductor or bonding wires may be damaged. Read More

GENERAL PURPOSE < Back LS190 GENERAL PURPOSE The LS190 is a General Purpose Single N-Channel JFET Amplifier. This part is available in the TO-92 3L package, as well as the SOT-89 3L package. 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. Datasheet Spice Model Application Notes

< Back Headphone Amp Eval Board Introduction Linear Integrated Systems headphone amplifier evaluation board includes the following features: Stereo, single‐ended input and single‐ended output 400 mW output power into 100Ω Wide frequency response (10Hz‐200kHz; ‐1dB) Voltage gain 5 (14dB) Low distortion (THD+N is less than 1% at 10Hz‐20kHz at 5Vrms into 100Ω and less than 0.1% from 10 Hz to 20 kHz at 1Vrms into 100Ω load) Short‐circuit protection Pop reduction (slow start) circuit Defeatable cross‐feed circuit Volume control Overvoltage and reverse polarity power protection Audio input and output connections: left and right RCA phono jack inputs, ¼” stereo phone jack output External 9V–16V supply input External power supply connector: power jack, inside diameter 2.1mm, outside diameter 5.5mm Read More

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

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back SST/U401 Series LOW-NOISE, LOW-DRIFT, MONOLITHIC DUAL N-CHANNEL JFET AMPLIFIER The SST/U401, 402, 403, 404, 405 and 406 Low-Noise, Low-Drift, Monolithic Dual N-Channel JFET amplifiers are targeted for use in a wide range of precision instrumentation and sensor applications. They are available in the TO-71 6L, SOIC 8L and SOT-23 6L 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: U401 TO-71 6L RoHS U402 TO-71 6L RoHS U403 TO-71 6L RoHS U404 TO-71 6L RoHS U405 TO-71 6L RoHS U406 TO-71 6L RoHS SST401 SOIC 8L RoHS SST402 SOIC 8L RoHS SST403 SOIC 8L RoHS SST404 SOIC 8L RoHS SST405 SOIC 8L RoHS SST406 SOIC 8L RoHS U401 Die U402 Die U403 Die U404 Die U405 Die U406 Die Datasheet Spice Model Application Notes

< 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

< Back Consider the JFET Introduction Though not as well known as the bipolar transistor or op amp, this long-established transistor still excels in where you need to optimize circuit behavior, such as for lowest noise. Many engineers are somewhat familiar with discrete bipolar transistors, such as the venerable 2N2222. They are also comfortable with the MOSFET (metal-oxide semiconductor field-effect transistor) as a discrete device for amplifying analog signals and switching power signals, as well as its role as the key digital structural element in large-scale ICs. But alongside these devices is the JFET (junction field-effect transistor), which was developed soon after the bipolar transistor. To many designers, the JFET is the nearly ideal three-terminal solid-state device, and its operation and parameters are analogous to the vacuum-tube triode. The difference is that the JFET is, of course, a low-voltage, much-more efficient device, although it can't deliver the power that a vacuum tube can. For applications which require extremely low noise, the JFET is often offers superior performance compared to any other discrete device, as well as op amps. Read More

< Back Designing Audio Circuits and Systems Linear Systems Jul 25, 2024 Exploring Phono Preamp Circuits with Bob Cordell’s New Book At Linear Systems, we are always on the lookout for innovative and educational resources to share with our community of designers and engineers. This Friday, we are thrilled to spotlight a phono preamp circuit from our friend Bob Cordell’s excellent new book, “Designing Audio Circuits and Systems.” Bob Cordell is a respected authority in the field of audio electronics, and his latest book is a treasure trove of knowledge for anyone interested in audio circuit design. The book is packed with detailed explanations, practical insights, and a wide range of circuits that cater to both beginners and seasoned designers. One of the standout chapters for us is Chapter 15, which delves into the design of moving magnet phono preamps. Phono preamps are essential for amplifying the signal from a turntable to a level that can be processed by a standard audio system. The moving magnet preamp circuit featured in Chapter 15 is not only a fantastic educational tool but also a highly practical design for anyone looking to enhance their vinyl listening experience. To bring this design to life, we captured the schematic in QSPICE, our go-to tool for electronic circuit simulation. QSPICE allows us to create accurate simulations, enabling designers to tweak and optimize their circuits with ease. With just a few clicks, you can dive into simulations and start experimenting with the design parameters to see how they affect the performance of the preamp. Whether you are an audio enthusiast, a professional designer, or someone with a keen interest in electronics, Bob Cordell’s book and this phono preamp circuit offer a wealth of knowledge and a fun project to work on. We highly recommend adding “Designing Audio Circuits and Systems” to your library and exploring the many circuits it has to offer. Stay tuned for more exciting designs and insights from Linear Systems. Happy designing!

< 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

< Back MOSFETs Linear Systems Jul 9, 2024 Linear Systems’ small signal MOSFETs consist of two MOSFETs on the same piece of silicon resulting in better matching and better performance over temperature. In the world of electronics, MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) are a type of field-effect transistor that have become increasingly popular due to their ability to handle high power and voltage levels. They are an essential component in many electronic devices and systems, making them an important topic for anyone interested in electrical engineering. Linear Systems, a renowned electronics company, is well-known for its production of high-quality MOSFETs. In this article, we will explore the basics of MOSFETs and dive into the specific features and advantages offered by Linear Systems' MOSFETs. What is a MOSFET? A MOSFET is a type of transistor that works by controlling the flow of current between the source and drain terminals using an electric field. The electric field is created by applying a voltage to the gate terminal, which is separated from the channel (where the current flows) by a thin layer of insulating material. There are two main types of MOSFETs: N-channel and P-channel. In an N-channel MOSFET, a negative voltage applied to the gate creates an electric field that allows current to flow between the source and drain terminals. In a P-channel MOSFET, a positive voltage applied to the gate has the same effect. Features of Linear Systems' MOSFETs Linear Systems takes pride in producing high-quality MOSFETs that offer a range of features and advantages. Here are some notable ones: High Power Handling: Linear Systems' MOSFETs can handle high power levels, making them suitable for use in various applications such as power supplies and motor drivers. Low On-State Resistance: The on-state resistance (RDS(on)) is an important parameter that determines the efficiency of a MOSFET. With its advanced design and manufacturing processes, Linear Systems' MOSFETs have low RDS(on) values, leading to reduced power losses and improved performance. Fast Switching Speed: Another critical factor in MOSFET performance is switching speed. Linear Systems' MOSFETs have fast switching speeds, allowing for efficient control of current flow and reducing the risk of thermal damage. Low Gate Threshold Voltage: The gate threshold voltage is the minimum voltage required to turn on a MOSFET. With low gate threshold voltages, Linear Systems' MOSFETs can be easily controlled by lower voltage signals, making them suitable for use in low-power applications. High Temperature Operation: Linear Systems' MOSFETs are designed to operate at high temperatures without sacrificing performance or reliability. This makes them ideal for use in harsh environments where other components may struggle to function properly. Advantages of Using Linear Systems' MOSFETs In addition to their features, Linear Systems' MOSFETs also offer several advantages over other types of transistors: Lower Cost: Compared to bipolar junction transistors (BJTs), MOSFETs are typically less expensive to produce. This cost-saving is passed onto customers, making Linear Systems' MOSFETs a more economical option for many applications. Less Power Consumption: MOSFETs have lower power consumption compared to BJTs due to their high input impedance and low leakage currents. This results in lower operating costs and improved energy efficiency for devices that use them. Smaller Size: Due to their small size and simplified manufacturing process, MOSFETs can be made in much smaller packages compared to BJTs. This makes them ideal for use in compact devices or applications where space is limited. High Reliability: Linear Systems' MOSFETs are highly reliable and have a long lifespan, making them suitable for use in critical systems that require continuous operation. They also have built-in protection features such as overvoltage and overcurrent protection, further increasing their reliability. Applications of Linear Systems' MOSFETs Due to their numerous advantages, Linear Systems' MOSFETs find use in various applications across different industries: Power Electronics: MOSFETs are commonly used in power electronics, such as motor drives and power supplies. Their high switching speed and low on-resistance make them well-suited for these applications. Automotive Industry: MOSFETs are also used extensively in the automotive industry due to their ability to handle high currents and voltages. They can be found in various components of vehicles, including ignition systems, electric windows, and electronic control units. Consumer Electronics: Many consumer electronics devices use MOSFETs, such as smartphones, laptops, and televisions. Their small size and low power consumption make them ideal for use in portable devices where space is limited. Industrial Automation: MOSFETs are commonly used in industrial automation systems, such as motor controllers and power inverters. Their high efficiency and reliability make them well-suited for these applications. Renewable Energy Systems: MOSFETs** play a crucial role in renewable energy systems, such as solar panels and wind turbines. They help regulate the flow of electricity by converting DC power to AC or vice versa, allowing for more efficient use of renewable energy sources.** Conclusion MOSFETs offer numerous advantages over traditional BJTs, making them an essential component in modern electronic devices and applications. With continued advancements in technology, MOSFETs will continue to play a vital role in increasing efficiency and reliability for various industries. As new developments in materials and design continue to emerge, MOSFETs will become even more versatile and play an even bigger role in powering the devices of tomorrow. So next time you power up your smartphone or use renewable energy, remember that MOSFETs are working hard behind the scenes to make it all possible! Additionally, researchers are constantly exploring new ways to improve MOSFET technology by experimenting with different materials, structures, and fabrication techniques. This ongoing research aims to further enhance the performance and efficiency of MOSFETs, making them an integral part of our future technological advancements. Moreover, as demand for low-power consumption continues to increase in various industries such as automotive, consumer electronics, and space exploration, MOSFETs will be crucial in meeting these energy-efficient requirements. This further highlights the significance of MOSFETs and their continued development in shaping our modern world. Future Possibilities: As technology advances and new applications emerge, there is no limit to what can be achieved with MOSFETs. With the potential for higher power densities, faster switching speeds, and improved reliability, MOSFETs have a promising future in various industries. From electric vehicles to smart grids, from medical devices to space missions, there are endless possibilities for using MOSFETs to improve efficiency and performance. As researchers continue to push the limits of what is possible with this technology, we can expect to see even more innovative uses of MOSFETs in the near future. Collaboration and Innovation: The development of MOSFET technology has been a collaborative effort between scientists, engineers, and manufacturers from around the world. This collaboration allows for the sharing of ideas, resources, and expertise leading to continuous innovation and improvement of MOSFETs. As we move towards a more interconnected global society, this collaborative approach will be crucial in driving advancements in MOSFET technology and its diverse applications. Impact on Society: The impact of MOSFETs goes beyond just technological advancement. These devices have also played a significant role in shaping our modern society. With their ability to improve energy efficiency and reduce power consumption, MOSFETs have contributed to reducing our carbon footprint and promoting sustainable living. Additionally, the use of MOSFETs in various electronic devices has made them more accessible and affordable for a wider demographic, enhancing connectivity and communication across the globe. Continued Development: Despite their success and widespread use, researchers are not slowing down in their efforts to improve MOSFET technology. As we continue to demand higher performance from our devices, the development of new materials, structures, and fabrication techniques will be crucial in meeting these demands. This continuous improvement ensures that MOSFETs remain at the forefront of technological innovation for years to come. View our MOSFETs.

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