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< Back FETching Discrete Amplifier Introduction Low-noise amplifiers for photodiode, piezoelectric, and other instrumentation applications typically call for circuit parameters such as extremely high input impedance, low 1/f noise, or subpicoamp bias currents that cannot be met with available integrated products. This article discusses the requirements and challenges of designing a low-noise amplifier using discrete components, with particular emphasis on input-referred noise and offset voltage trimming. Read More

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back LS840 Series LOW-NOISE, LOW-DRIFT, LOW CAPACITANCE, MONOLITHIC DUAL N-CHANNEL JFET AMPLIFIER The LS840 Series Low-Noise, Low-Drift, Low-Capacitance, Monolithic Dual N-Channel JFET Amplifier is a pin-for-pin replacement for the Fairchild, Motorola, National and Siliconix-Vishay part series. Available in the TO-71 6L, TO-78 6L, PDIP 8L 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 Below are the options you have when ordering this part series: LS840 TO-71 6L RoHS LS841 TO-71 6L RoHS LS842 TO-71 6L RoHS LS840 TO-78 6L RoHS LS841 TO-78 6L RoHS LS842 TO-78 6L RoHS LS840 PDIP 8L RoHS LS841 PDIP 8L RoHS LS842 PDIP 8L RoHS LS840 SOIC 8L RoHS LS841 SOIC 8L RoHS LS842 SOIC 8L RoHS LS840 Die LS841 Die LS842 Die Datasheet Spice Model Application Notes

LOG CONFORMANCE, MONOLITHIC DUAL, NPN TRANSISTOR < Back LS318 LOG CONFORMANCE, MONOLITHIC DUAL, NPN TRANSISTOR The LS318 Log Conformance, Monolithic Dual, NPN Transistor is a direct replacement for the Micro Power Systems MP318 Series. It is ideal for Log Conformance, Transistors 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 Below are the options you have when ordering this part series: LS318 TO-71 6L RoHS LS318 TO-78 6L RoHS LS318 PDIP 8L RoHS LS318 SOIC 8L RoHS LS318 Die Datasheet Spice Model Application Notes

< 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.

< Back Current Regulating Diodes Introduction Abstract: Many analog circuit designs have the need for current regulation. Examples include circuits that process signals from sensors, circuits that amplify, and voltage reference or regulators. Current regulation can be referred to as a current source or a Norton device/equivalent circuit (cf. Thevenin equivalent circuit). Read More

TIGHTLY MATCHED, MONOLITHIC DUAL, NPN TRANSISTOR < Back LS3250 Series - Dual TIGHTLY MATCHED, MONOLITHIC DUAL, NPN TRANSISTOR Previous Next

< Back LSK170 Press Release Linear Systems Mar 17, 2023 Direct Replacement for Toshiba 2SK170 LINEAR INTEGRATED SYSTEMS NEW ULTRA LOW NOISE JFETs TARGET AUDIO, INSTRUMENTATION, MEDICAL AND SENSORS LSK170 SERIES DELIVERS DIRECT PIN FOR PIN REPLACEMENT OF TOSHIBA'S 2SK170 FREMONT, Calif. January 25, 2005 Linear Integrated Systems, a leading full-service manufacturer of specialty linear semiconductors, announces the immediate availability of its LSK170 series of JFETs, optimized to provide low noise at both high and low frequency with a narrow range of IDSS and low capacitance. The LSK170's low noise to capacitance ratio and narrow range of low value IDSS provide solutions for low noise applications which cannot tolerate high values of capacitance or wide ranges of IDSS. The LSK170 offers a voltage noise (en) of 1nv/hz @ 1khz, 2nv/hz @ 10hz typical and a High Gain (yfs, 22ms), with only 22pf of capacitance (Ciss). This series has three grades of IDSS range: 2.6-6mA, 6.0-12mA, and 10-20mA. The narrow ranges of IDSS binning with the LSK170 promote ease of design tolerancing, particularly in low voltage applications. The LSK170 is ideal for portable battery operated applications, and features high BVDSS for maximum linear headroom in high transient program content amplifiers. The series has a uniquely linear VGS transfer function for a stability that is highly desirable, particularly for audio front-end preamplifiers. The device is available in surface mount SOT-23 and thru-hole TO-92 packages. The surface mount version of the LSK170 series creates new opportunities for engineers seeking to design lower noise circuits in compact embeddable applications where shielding and space is critical and are not supported with the traditional TO-92 package. The LSK170 series is a pin for pin replacement of the Toshiba 2SK170 and improved functional replacement for the Interfet IF1320, IF1330, IF1331, and IF4500. Superior Performance, Domestic Source The LSK170 is specifically designed for low noise, high input impedance applications within the audio, instrumentation, medical and sensors markets. Our new LSK170 series feature a unique low noise profile having nearly zero popcorn noise," says Dr. John Hall, Linear Integrated Systems founder and president. "Utilizing large scale integrated circuit technology to build the LSK170 series allows LIS to achieve the goals of high transconductance, low noise and a low value of gate to drain capacitance. This combined with recent developments in Ion Implant technology optimized for low noise has allowed the creation of this state-of-the-art product." Linear Integrated Systems domestic in-factory stock guarantees short lead times, ensuring no disruption in production schedules. Summary of Features: Low Noise (en <1 nv/hz @ 1khz, 2 nv/hz @ 10hz typ) Low Capacitance (20pf typ) High Input Impedance Availability in narrow IDSS grades/ranges (2.6-6mA, 6.0=12mA and 10-20mA) High Gain (Yfs = 22mS typ) High Breakdown Voltage (BVGSS = 40V Min) Improved pin for pin replacement for Toshiba 2SK170 Surface mount SOT23 version (not offered by Toshiba 2SK170) Improved functional replacement for Interfet IF1320, IF1330, IF1331, and IF4500 Applications: Audio amplifiers and preamps, discrete low-noise operational amplifiers, battery-operated audio preamps, guitar pickups, effects pedals, microphones, audio mixer consoles, acoustic sensors, sonobouys, hydrophones, chemical and radiation detectors, instrumentation amplifiers, accelerometers, CT scanners input stages, oscilloscope input stages, electrometers and vibrations detectors. Price: LSK170A TO-92 3L = $4.46 (1,000+ pieces), LSK170A SOT-23 3L = $4.62 (1,000+ pieces) Availability: Sampling now in SOT-23 and TO-92 package options Delivery: Factory Stock About Linear Integrated Systems Linear Integrated Systems, Inc. is a U.S.-based, full service manufacturer of specialty linear products founded in 1987 with headquarters in Fremont, California. The company's small-signal discrete product lines are specifically designed to service the new design and second-source requirements of customers in the audio, hybrid, medical, space, test and measurement markets. Linear Integrated Systems supplies pin for pin replacements for more than 2,000 discrete devices currently offered or discontinued by Interfet, Intersil, Micro Power Systems, Motorola, National, Fairchild, Toshiba, and Siliconix-Vishay. Linear Integrated Systems has more than 35 years of design and process expertise in JFET and transistor manufacturing. The company’s founder, Dr. John Hall, has an established track record of leadership within various segments of the semiconductor industry, including the founding of Intersil and Micro Power Systems, development of the first 1 Volt CMOS digital watch and numerous related semiconductor patents. Engineers are invited to contact Linear Integrated Systems for assistance with application or special testing issues. Phone 510-490-9160 Fax: 510-353-0261 Email: sales@linearsystems.com Website: www.linearsystems.com

SINGLE, N-CHANNEL ENHANCEMENT MODE MOSFET < Back 3N170 Series SINGLE, N-CHANNEL ENHANCEMENT MODE MOSFET The 3N170 Series Single, N-Channel Enhancement Mode MOSFET is a direct replacement for Intersil and Siliconix-Vishay equivalent part. It is ideal for Amplifier and Switching Applications. The part series is available in the TO-72 4L RoHS and SOT-143 4L RoHS package, as well 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: 3N170 TO-72 4L RoHS 3N171 TO-72 4L RoHS 3N170 SOT-143 4L RoHS 3N171 SOT-143 4L RoHS Datasheet Spice Model Application Notes

< Back Design Specs for JFETs Introduction Junction field effect transistors (JFETs) are used and are useful in many different circuit topologies. Because these devices function as voltage controlled current sources (VCCS) as opposed to current controlled current sources (CCCS), they offer designers certain flexibilities in designs not available when using bipolar transistors (which are CCCS devices). JFETs can also be used as voltage controlled variable resistors and voltage-controlled switches. JFETs have extremely high input impedances (on the order of giga-ohms) and extremely low input leakage currents (on the order of pico-amps). Selected parts are designed to have excellent performance in high and very high frequency (VHF) circuits. Read More

CURRENT REGULATING DIODE < Back SST500 Series CURRENT REGULATING DIODE The SST500 Series Current Regulating Diode is a direct replacement for the Siliconix-Vishay SST500 Series. It is ideal for current-limiting and constant-current applications. It is available in the SOT-23 3L 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: SST500 SOT23 3L RoHS SST501 SOT23 3L RoHS SST502 SOT23 3L RoHS SST503 SOT23 3L RoHS SST504 SOT23 3L RoHS SST505 SOT23 3L RoHS SST506 SOT23 3L RoHS SST507 SOT23 3L RoHS SST508 SOT23 3L RoHS SST509 SOT23 3L RoHS SST510 SOT23 3L RoHS SST511 SOT23 3L RoHS J500 Die J501 Die J502 Die J503 Die J504 Die J505 Die J506 Die J507 Die J508 Die J509 Die J510 Die J511 Die Datasheet Spice Model Application Notes

SINGLE P-CHANNEL JFET SWITCH < Back J/SST174 Series SINGLE P-CHANNEL JFET SWITCH The J/SST174 Series Low On-Resistance, P-Channel JFET Switch is a direct replacement for the Fairchild and Siliconix-Vishay part series. It is ideal for low resistance, low operating current switching applications. Available in the DFN 8L RoHS, TO-92 3L RoHS and 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: 174DFN 8L RoHS 175DFN 8L RoHS 176DFN 8L RoHS 177DFN 8L RoHS J174 TO-92 3L RoHS J175 TO-92 3L RoHS J176 TO-92 3L RoHS J177 TO-92 3L RoHS SST174 SOT-23 3L RoHS SST175 SOT-23 3L RoHS SST176 SOT-23 3L RoHS SST177 SOT-23 3L RoHS J174 Die J175 Die J176 Die J177 Die Datasheet Spice Model Application Notes

LOG CONFORMANCE, MONOLITHIC DUAL, PNP TRANSISTOR < Back LS358 LOG CONFORMANCE, MONOLITHIC DUAL, PNP TRANSISTOR Previous Next