Search Results

Ultra-Low Noise, High Input Impedance, N-Channel JFET Amplifier < Back LS BF862 Ultra-Low Noise, High Input Impedance, N-Channel JFET Amplifier The LSBF862 Single, Ultra-Low Noise, High Input Impedance, N-Channel JFET Amplifier is a direct, improved replacement for the discontinued NXP BF862. It is designed for applications requiring exceptional noise performance and high-impedance signal amplification. Engineered for precision and reliability, the LSBF862 provides superior noise characteristics, higher breakdown voltage, and greater flexibility through selectable testing and screening options. It is ideal for low-noise audio, acoustic, and sensor front-end applications. Available in the SOT-23 3L RoHS package, as well as in custom die form, the LSBF862 supports both legacy and next-generation designs. Key Features Ultra-Low 10 Hz Noise High Input Impedance, Low Capacitance Higher −40 V Gate-Source Breakdown Voltage Radiation Tolerant (No Special Hardening Required) Symmetrical Geometry — Source/Drain Interchangeable Special Testing Available for VGS, IDSS, and Other DC Parameters Benefits Superior Noise Performance for Audio, Acoustic, Instrumentation and Sensor Applications Seamless Drop-In Replacement for the BF862 — No Redesign Required Supports Repairs and Spares for Legacy Designs Available Customization by Specialized Screening and Selection Applications Audio & Acoustic Amplifiers Charge, Buffer, and Sample-and-Hold Circuits Discrete Operational Amplifiers Transimpedance Amplifiers (TIAs) Photodiode and Piezoelectric Preamplifiers Microphone, Hydrophone, and Sonar Front-Ends Medical Instrumentation: ECG, EEG, EKG, MRI, PET High-Impedance Probes and Spectrum Analyzers Frequently Asked Questions (FAQ) Is the LSBF862 a direct BF862 replacement? Yes. It is a drop-in, improved replacement with lower noise, higher breakdown, and long term availability. Is it in active production? Yes. Current available inventory of SOT-23 3 Lead package and Die Form, with no plans to discontinue. Is the LSBF862 available with special sorting or matching? Yes. 100% Special testing is offered Additional Special Screening & Customization Options Special screening is available across Linear Systems’ product lineup — including JFETs, MOSFETs, Bipolar Transistors, Current Regulators, and Diodes. Available in the SOT-23 3L RoHS package, as well as in die form. Connect with our technical team to tailor your requirements: Email support@linearsystems.com or call (510) 490-9160 MOQ applies to all specialized services. Click Here to Request Free LSBF862 Samples Ordering Information Below are the available configurations for the LSBF862 series: Standard Part Call-Out Select Part Call-Out (Select Parts Include SEL + 4 Digit Numeric Code) LSBF862 SOT-23 3L RoHS LSBF862 SOT-23 3L RoHS SELXXXX LSBF862 Die LSBF862 Die SELXXXX When ordering, include the full Linear Systems part number and package type. Custom screening selections (VGS, IDSS, etc.) available upon request. Datasheet Spice Model Application Notes

Linear Systems’ line of ultra-low-noise, low-noise and standard product JFET singles provide the industry’s widest range of design choices. JFET Amplifiers - Singles Linear Systems’ line of ultra-low-noise, low-noise and standard product JFET singles provide the industry’s widest range of design choices. LS BF862 Ultra-Low Noise, High Input Impedance, N-Channel JFET Amplifier Read More 2N/PN/SST4416 Series SINGLE, HIGH FREQUENCY, N-CHANNEL JFET AMPLIFIER Read More 4117DFN SERIES SINGLE, LOW CAPACITANCE, ULTRA-HIGH INPUT IMPEDANCE N-CHANNEL JFET AMPLIFIER - DFN Read More J/SST210 Series LOW NOISE N-CHANNEL JFET GENERAL PURPOSE AMPLIFIER Read More LSK170X ULTRA LOW NOISE, HIGH IDSS SINGLE N-CHANNEL JFET AMPLIFIER Read More LS190 GENERAL PURPOSE Read More LSK170 Series SINGLE, LOW NOISE, LOW CAPACITANCE, HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER Read More 2N/PN/SST4117 Series SINGLE, LOW CAPACITANCE, ULTRA-HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER Read More LSBF510 GENERAL PURPOSE, LOW-NOISE, LOW-COST, SINGLE N-CHANNEL JFET, REPLACEMENT FOR THE BF510 Read More LS/PF/SST5301 SINGLE, HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER Read More LSK189 SINGLE, LOW-NOISE, LOW-LEAKAGE, N-CHANNEL JFET AMPLIFIERS Read More LS846 SINGLE, LOW-LEAKAGE, LOW-NOISE, N-CHANNEL JFET AMPLIFIER Read More LSJ/SST74 Series SINGLE, ULTRA-LOW NOISE, P-CHANNEL JFET AMPLIFIER Read More LSJ289 LOW NOISE, LOW CAPACITANCE SINGLE P-CHANNEL JFET Read More J/SST201 Series SINGLE, LOW NOISE, HIGH GAIN, N-CHANNEL JFET AMPLIFIER Read More J/SST/U308 Series SINGLE, HIGH FREQUENCY, N-CHANNEL JFET AMPLIFIER Read More LS5301 HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER Read More

Linear Systems has been designing, manufacturing, and distributing high-performance JFET Amplifiers, DMOS Switches, Current Regulating Diodes, Bipolar Transistors, and JFET Switches since 1987. Our specialty semiconductors are recognized as the best in their class for precision, reliability, and performance. Building Excellence, One Part at a Time Since 1987, Linear Systems has been a leader in manufacturing specialty semiconductors. Operating from three Silicon Valley fabrication facilities, we serve a wide range of industries, including defense, aerospace, professional audio, and more. Our components are integral to applications such as military underwater surveillance, space telescope cameras, high-fidelity audio equipment, and advanced aerospace sensors. Our dedicated team is committed to delivering high-quality, reliable components, ensuring timely delivery to meet our customers' needs. Request a Quote Tailored Solutions to Meet Your Exact Specifications Get Started Connect with our expert technical team to discuss your project today: Call (510) 490-9160 or Email support@linearsystems.com How We Help You At Linear Systems, we understand that every application has unique demands. That’s why we offer advanced screening and customization options across our full product range, including N-Channel and P-Channel JFETs, High-Speed N-Channel Lateral DMOS Switches, Single and Quad Current-Regulating Diodes, Ultra Low-Leakage Diodes, NPN and PNP Bipolar Transistors, N-Channel and P-Channel Small Signal MOSFETs, and BIFET devices. Our advanced screening process allows for precise parameter selection, covering all specifications listed in our standard data sheets, including detailed package pin-outs. Whether you need tighter tolerances, specific performance metrics, or custom sorting, we can tailor our parts to meet your exact requirements. Let’s build exactly what you need. View Products High-Performance Components for Demanding Applications At Linear Systems, we specialize in precision analog components engineered for exceptional performance in the most demanding industries. Our flagship LSK series of ultra-low-noise JFETs—including the LSK389 and LSK170—delivers industry-leading noise performance trusted in critical applications worldwide. These monolithic dual and single N-Channel JFETs provide outstanding performance at competitive prices, complemented by a wide range of high-performance Improved Standard JFETs. For high-speed switching, our lateral DMOS switches set the standard for speed and reliability. Available as single and quad nanosecond switches with or without protection diodes, they enable fast, precise switching in demanding applications. Our PAD/JPAD/SSTPAD ultra-low-leakage diodes protect sensitive circuit inputs with leakage currents as low as -1 pA (PAD1). They’re ideal for op-amps, ADC analog inputs, analog multiplexers, and RS485 line receivers. The SST500 series of current-regulating diodes ensures consistent performance in high-reliability environments, such as test equipment, medical devices, and instrumentation. Using JFET technology, these diodes simplify circuit integration while maintaining precision. From precision JFETs to specialized diodes and switches, Linear Systems delivers components that meet the highest standards of performance and reliability. Explore our: Low-Noise JFETS Explore our: Low Leakage Diodes & Current Regulating Diodes Explore our: High-Speed DMOS Switches

Discover our diverse product line of innovative solutions at 4042 Clipper Court, Fremont, CA, USA. From Ultra-Low-Noise JFETs to Current Regulating Diodes, DMOS High-Speed Switches, MOSFETs, Bipolar Transistors, Low Leakage Diodes, and Voltage Controlled Resistors, we offer cutting-edge technology to meet your needs. Find the perfect solution for your requirements today! Our Products Linear Systems specializes in manufacturing high-performance small-signal discrete semiconductors, including ultra-low-noise monolithic dual and single JFETs, high-speed lateral DMOS switches, low-leakage diodes, current-regulating diodes, monolithic dual transistors, MOSFETs, BiFET amplifiers, and voltage-controlled resistors. Our products are recognized for their precision, reliability, and performance, serving applications in military sensors, industrial controls, high-end audio equipment, medical electronics, and test and measurement instruments. Notably, our LSK series, featuring the LSK389 and LSK170 ultra-low-noise N-channel JFETs, is designed for the most demanding applications. Our high-speed lateral DMOS switches, including single and quad nanosecond switches, offer exceptional performance with minimal crosstalk. Additionally, our PAD series of low-leakage diodes provides superior alternatives when reverse current must be minimized, with leakage currents ranging from -1 pA to -100 pA. Since 1987, we have been committed to delivering cutting-edge semiconductor solutions that meet the evolving needs of our customers. JFET Amplifiers Duals JFET Amplifiers Singles JFET Switches DMOS High Speed Switches Low Leakage Diodes Current Regulating Diodes Bipolar Transistors MOSFETs Voltage Controlled Resistors BIFET Amplifier Sample Boxes

SINGLE, HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER < Back LS/PF/SST5301 SINGLE, HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER The LS/PF/SST5301 Single, High Input Impedance, N-Channel JFET Amplifier is a direct replacement for the Fairchild equivalent part. It is ideal for very high input impedance applications. Available in the TO-72 4L, TO-92 3L and 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: LS5301 TO-72 4L RoHS PN5301 TO-92 3L RoHS SST5301 SOT-23 3L RoHS LS5301 Die Datasheet Spice Model Application Notes

SINGLE, P-CHANNEL ENHANCEMENT MODE MOSFET < Back 3N163 Series SINGLE, P-CHANNEL ENHANCEMENT MODE MOSFET The 3N163 Series Single, P-Channel Enhancement Mode MOSFET is a direct replacement for Intersil and Siliconix-Vishay equivalent part. It is ideal for Amplifier and switching Applications. This part series is available in the TO-72 4L RoHS and SOT-143 4L RoHS package, as well as bare die. All Linear Systems devices are available with special testing to customer specifications. Ordering Information Below are the options you have when ordering this part series: 3N163 TO-72 4L RoHS 3N164 TO-72 4L RoHS 3N163 SOT-143 4L RoHS 3N164 SOT-143 4L RoHS 3N163 Die 3N164 Die Datasheet Spice Model Application Notes

< 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 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

< Back Military Sensors White Paper Linear Systems Mar 17, 2023 Linear Systems' White Paper Describes Lowest Noise Amplification for Sensor Signal Chains FREMONT, Calif., May 27, 2021 /PRNewswire/ -- Linear Systems, a world class producer of ultra low noise JFETS and semiconductors, has released an application note on creating low-noise signal chains for military sensors. The paper, "Military Higher-Performance Sensor Signal Chains," offers engineers solutions using ultra-low-noise discrete components added to an IC-based circuit to produce the better-performing signal chains in sensitive applications. Included are key applications with reference designs such as: Piezoelectric Element Preamps; Hydrophones; Accelerometers; Photodiode Preamps; and other types of sensors where discrete components are uniquely capable of performing critical initial amplification of sensor signals. "Better sensor systems enable earlier threat detection and more effective countermeasures, " Mr. Tim McCune said. "Our ultra-low-noise JFETS enable designers to build more sensitivity and capability into their sensor systems. This improved capability translates directly into greater value to the end users of these sensors." Linear Systems is a designer, manufacturer and seller of precision, high-performance, small-signal discrete semiconductors. A Silicon Valley company founded in 1987, it produces ultra-low-noise, monolithic dual and single JFETs and bipolar transistors, along with high-speed DMOS switches, small-signal MOSFETs, ultra-low leakage diodes and BiFET amplifiers. These parts have been designed into world-class products in the areas of: Test & Measurement, Audio, Scientific Optical, Military Sensor; Industrial Controls; and Hybrids. The White Paper can be downloaded at: High-Performance Military Sensor Signal Chains Data sheets, applications notes, SPICE models and other information can be downloaded at www.linearsystems.com . For More Information: Call Linear Systems toll free phone number: (800) 359-4023, regular business line: (510) 490-9160 or fax: (510) 353-0261. Email: sales@linearsystems.com Website: www.linearsystems.com SOURCE Linear Integrated Systems

HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER < Back LS5301 HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER The LS/PF/SST5301 Series Single, High Input Impedance, N-Channel JFET Amplifier is a direct replacement for the Fairchild equivalent part. It is ideal for Very High Input Impedance Applications. Available in TO-72 4L 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: PF5301 TO-92 3L RoHS LS5301 TO-72 4L RoHS SST5301 SOT-23 3L RoHS LS5301 Die Datasheet Spice Model Application Notes

< Back SD5400/SD5000 Linear Systems Mar 17, 2023 Introducing Family of Quad N-channels NEWS RELEASE FOR INFORMATION CONTACT: Linear Systems, Inc. Sales Department Phone: (510) 490-9160 Email: sales@linearsystems.com Linear Systems Announces the Immediate Availability of SD5400 / SD5000 Family of Quad N-Channel Enhancement Mode Lateral DMOS Analog Switches FREMONT, CA – Linear Systems is announcing the immediate availability of the SD5400 / SD5000 Family of Quad N-Channel Enhancement Mode Lateral DMOS Analog Switches, specifically designed for high-speed switching applications. These ultra-fast switches offer improved accuracy, speed, and throughput, with less glitching or distortion than JFETs or multiplexers. Designed for high-frequency RF operation, they provide switching speeds of 1ns with a unique combination of 70 ohms "ON" resistance and a reverse transfer capacitance of 0.5 pF. A maximum threshold of 1.5 volts permits simple TTL and CMOS driving for small signal applications. The SD5400 / SD5000 can switch analog signals up to +/- 10 volts, while the SD5401 / SD5001 can switch signals up to +/- 5 volts. All versions include gate ESD protection with zener diodes. The surface mount versions, SD5400 / SD5401, are available in 14 and 16 pin narrow body SOIC packages. The thru-hole versions, SD5000N / SD5001N, are available in 16 pin DIP packages. All package types are available with special electrical selection, including bare die form. Summary of Features : - High Speed Switching (td (ON) / (OFF) = 1ns max) - Ultra Low Reverse Capacitance (Crss = 0.5 pF max) - Low Turn-On Threshold Voltage (Vgs(th) = 1.5V max) - Switches Analog Signals up to +/- 10 volts - CMOS and TTL Compatible - Second Source Replacement for Calogic and Siliconix SD5400 / SD5000 Families - Available in Surface Mount SOIC-14, 16 pin, PDIP-16 Packages, and Bare Die Applications: - ATE (Automatic Test Equipment) Analog Switch - Analog to Digital and Digital to Analog Converters - Laser Drivers - Medical Imaging - Multiplexer - Sample and Hold - Switch Driver - Vision Systems Delivery: Factory Stock For more information, contact Linear Systems at sales@linearsystems.com or call (510) 490-9160. 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, MOSFETs, PhotoFETs, and Voltage-Controlled Resistors. Datasheets, application notes, SPICE models, and additional information can be downloaded at www.linearsystems.com.

< Back Millions of Devices in Stock! Linear Systems Mar 17, 2023 LS844 Monolithic Dual Small-Signal JFET, 3N163 Small-Signal MOSFET, LS320 BiFET and Many More! NEWS RELEASE FOR INFORMATION CONTACT: Linear Systems, Inc. Sales Department Phone: (510) 490-9160 Email: sales@linearsystems.com Linear Systems Announces Large-Scale Availability of Ultra Low Noise JFETs and Small-Signal Semiconductors FREMONT, Calif. – August 26, 2021 – Linear Systems, a world-class producer of ultra-low-noise JFETs and other small-signal discrete semiconductors, announces the large-scale availability of five of its top-performing components. These components, ranging from low-noise monolithic dual JFETs to small-signal MOSFETs, are available in wafer form in quantities ranging from one million to ten million for immediate packaging and shipment. All parts meet Linear Systems' industry-leading datasheet specifications and are available for fast delivery due to substantial buffer stock of wafers. Parts available for shipment include : 1. LS844 Monolithic Dual Small-Signal JFET: One million dice in wafer form in stock. This low-noise front-end amplifier features high Common Mode Rejection Ratio and excellent matching over a wide range of temperatures. [Download Data Sheet] 2. 3N163 Small-Signal MOSFET : Three million dice in wafer form in stock. Ideal for sensor applications such as gas detection and piezo devices, with half the noise of competitors' parts. [Download Data Sheet] 3. LS320 BiFET Amplifier: 1.3 million dice in wafer form in stock. A high-input impedance, single monolithic amplifier, designed as a direct replacement for Amperex equivalent parts. Perfect for high impedance sense amplifier applications. [Download Data Sheet] 4. 2N/PN/SST4391 N-Channel JFET Series: 2.5 million dice in wafer form in stock. This single, low-noise N-channel JFET switch is ideal for low-noise, high-gain, low-resistance switching and amplifier applications. [Download Data Sheet] 5. 2N/PN/SST4117A N-Channel JFET Series: 14.3 million dice in wafer form in stock. This single, low-capacitance, ultra-high-input-impedance N-channel JFET amplifier is a direct replacement for Fairchild, NXP, and Siliconix-Vishay parts. [Download Data Sheet] These parts are also available in bare die and sorted wafer form. In addition to these million-plus parts inventories, Linear Systems keeps substantial quantities of all its parts on hand, including the industry-leading LSK389 monolithic dual N-channel ultra-low-noise JFET. About Linear Systems Founded in 1987, Linear Systems is a Silicon Valley-based designer, manufacturer, and seller of precision, high-performance, small-signal discrete semiconductors. Linear Systems produces ultra-low-noise monolithic dual and single JFETs, bipolar transistors, high-speed DMOS switches, small-signal MOSFETs, ultra-low-leakage diodes, and BiFET amplifiers. These parts are designed into world-class products in fields such as Test & Measurement, Audio, Scientific Optical, Military Sensor, Hydrophone/Sonobuoys, Industrial Controls, and Hybrids. For these and other parts, download Linear Systems' [Product Selection Guide] and [Databook]. For more information, visit www.linearsystems.com .