Search Results

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back LSJ689 LOW NOISE, LOW CAPACITANCE MONOLITHIC DUAL P-CHANNEL JFET The LSJ689 High Performance, P-Channel, Monolithic Dual JFET features extremely low noise, tight offset voltage and low drift over temperature. It is targeted for use in a wide range of precision instrumentation applications. The SOT-23 6L, TO-71 6L, SOIC 8L and DFN 8L packages provide ease of manufacturing and the symmetrical pinouts prevent improper orientation. The LSJ689 is also available in die form. SOT-23 6L, SOIC 8L and DFN 8L packages are available in tape & reel, compatible with automatic assembly methods. 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: LSJ689 TO-71 6L RoHS LSJ689 SOIC 8L RoHS LSJ689 SOT-23 6L RoHS 689 DFN 8L RoHS LSJ689 Die Datasheet Spice Model Application Notes

< Back J201 App Note Introduction Linear Systems products enable customers to build the lowest-noise signal chains possible. The J201 N-channel JFET is optimized for high gain. The part is particularly suitable for use in low power or high impedance amplifiers. 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 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

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 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

< Back LS844 App Note Introduction Introduction For circuits designed to work with high impedance sources, ranging from electrometers to microphone preamplifiers, the use of a low-noise, high-impedance device between the input and the op amp is needed in order to optimize performance. At first glance, one of Linear Systems’ most popular parts, the LSK389 ultra-low-noise dual JFET would appear to be a good choice for such an application. The part’s high input impedance (1 T) and low noise (1 nV/√Hz at 1kHz and 2mA drain current) enables power transfer while adding almost no noise to the signal. But further examination of the LSK389’s specification shows an input capacitance of over 20pF. This will cause intermodulation distortion as the circuit’s input signal increases in frequency if the source impedance is high. This is because the JFET junction capacitances are nonlinear. This will be especially the case where common source amplifier arrangements allow the Miller effect to multiply the effective value of the gatedrain capacitance. Further, the LSK389’s input impedance will fall to a lower value as the frequency increases relative to a part with lower input capacitance. A better design choice is Linear Systems’ LS844. Though the LS844 has slightly higher noise (2.5 nV/√Hz vs. 1.0 nV/√Hz) its much lower input capacitance of only 4pF means that it will maintain its high input impedance as the frequency of the input signal rises. More importantly, using the lower-capacitance LS844 will create a circuit that is much less susceptible to intermodulation distortion than one using the LSK389. The LS844’s lower gate-to-drain capacitance enables more effective, elegant audio circuit designs. The relatively high capacitance of the LSK389 often requires designers to use a cascode circuit to provide the ability to handle higher bandwidths without intermodulation distortion. The cascode does this by eliminating the Miller effect that can multiply the effective gate-drain capacitance and its associated nonlinear effects. However, the cascode adds complexity and noise contributed by the cascode transistors. The LS844 is an N-channel dual low-noise, lowcapacitance, tightly matched monolithic field effect transistor. It features: • 3ms transconductance at 2mA drain current • 1000 G input impedance • 60V breakdown voltage • gate-drain capacitance of only 1.5pF • 4pF input capacitance • 2.5 nV/√Hz noise at 1kHz • best low-noise/low-capacitance combination in the industry • lowest input capacitance per unit gate length in the industry • lowest noise for a given gate length in the industry • tight Vgs matching at operating bias The LS844 is particularly well suited to low-noise, highgain audio and instrumentation circuits operating from battery voltages up to 60 volts. 48V phantom-powered circuits, like those used in microphone preamplifiers, are especially benefited by the features of the LS844. Low operating Vgs, high gm, tight matching, low noise and low capacitance make it well-suited to numerous audio and instrumentation applications. Sensors, which play such an important role in today’s world, benefit greatly from the performance delivered by the LS844. Such sensor technologies include piezo, quartz, condenser, electret, and MEMs devices. These devices benefit from the LS844’s combination of low input capacitance and low noise. Electrometer applications also benefit from these characteristics. Read More

< 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

LOW LEAKAGE, MONOLITHIC DUAL, PICO-AMP DIODE < Back DPAD/SSTDPAD Series JPAD SERIES SINGLE, PICO AMP, LOW LEAKAGE DIODES The DPAD Series Low Leakage, Monolithic Dual, Pico-Amp Diode is a direct replacement for the Siliconix-Vishay part series. It is ideal for Pico Amp, Ultra Low Leakage, Protection Diode Applications. This part series is available in the TO-72 4L RoHS, TO-78 5L RoHS and SOIC 8L 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: DPAD1 TO-72 4L RoHS DPAD2 TO-72 4L RoHS DPAD5 TO-72 4L RoHS DPAD10 TO-72 4L RoHS DPAD20 TO-72 4L RoHS DPAD50 TO-72 4L RoHS DPAD100 TO-72 4L RoHS DPAD1 TO-78 5L RoHS DPAD2 TO-78 5L RoHS DPAD5 TO-78 5L RoHS DPAD10 TO-78 5L RoHS DPAD20 TO-78 5L RoHS DPAD50 TO-78 5L RoHS DPAD100 TO-78 5L RoHS DPAD1 SOIC 8L RoHS DPAD2 SOIC 8L RoHS DPAD5 SOIC 8L RoHS DPAD10 SOIC 8L RoHS DPAD20 SOIC 8L RoHS DPAD50 SOIC 8L RoHS DPAD100 SOIC 8L RoHS DPAD1 Die DPAD2 Die DPAD5 Die DPAD10 Die DPAD20 Die DPAD50 Die DPAD100 Die Datasheet Spice Model Application Notes

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 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

SINGLE, HIGH FREQUENCY, N-CHANNEL JFET AMPLIFIER < Back J/SST/U308 Series SINGLE, HIGH FREQUENCY, N-CHANNEL JFET AMPLIFIER The J/SST/U308 Series Single, High Frequency, N-Channel JFET Amplifier is a direct replacement for the Fairchild, NXP and Siliconix-Vishay equivalent part. It is ideal for High Frequency Applications. The series is available in the TO-92 3L RoHS, TO-18 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: J308 TO-92 3L RoHS J309 TO-92 3L RoHS J310 TO-92 3L RoHS U308 TO-18 3L RoHS U309 TO-18 3L RoHS U310 TO-18 3L RoHS SST308 SOT-23 3L RoHS SST309 SOT-23 3L RoHS SST310 SOT-23 3L RoHS U308 Die U309 Die U310 Die Datasheet Spice Model Application Notes