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< 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

MONOLITHIC DUAL AND SINGLE, PNP TRANSISTOR < Back LS3550 Series MONOLITHIC DUAL AND SINGLE, PNP TRANSISTOR Previous Next

ULTRA LOW NOISE, HIGH IDSS SINGLE N-CHANNEL JFET AMPLIFIER < Back LSK170X ULTRA LOW NOISE, HIGH IDSS SINGLE N-CHANNEL JFET AMPLIFIER The LSK170X Ultra Low-Noise, High Idss, Single N-Channel JFET Amplifier is ideal for Ultra-Low Noise Audio/Acoustic Applications. Available in the TO-92 3L RoHS, SOT-23 3L RoHS and SOT-89 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: LSK170X TO-92 3L RoHS LSK170X SOT-23 3L RoHS LSK170X SOT-89 3L RoHS LSK170X Die Datasheet Spice Model Application Notes

MONOLITHIC DUAL, P-CHANNEL ENHANCEMENT MODE MOSFET < Back 3N165 Series MONOLITHIC DUAL, P-CHANNEL ENHANCEMENT MODE MOSFET The 3N165 Series Monolithic Dual, P-Channel Enhancement Mode MOSFET is a direct replacement for Intersil and Siliconix-Vishay part. It is ideal for Amplifier and switching Applications. This part series is available in the Available in the TO-99 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: 3N165 TO-99 8L RoHS 3N166 TO-99 8L RoHS 3N165 SOIC 8L RoHS 3N1646 SOIC 8L RoHS 3N163 Die 3N164 Die Datasheet Spice Model Application Notes

LOG CONFORMANCE, MONOLITHIC DUAL, PNP TRANSISTOR < Back LS358 LOG CONFORMANCE, MONOLITHIC DUAL, PNP TRANSISTOR The LS358 Log Conformance, Monolithic Dual, PNP Transistor is a direct replacement for Micro Power Systems MP358 Series. It is ideal for Log Conformance, Transistor 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: LS358 TO-71 6L RoHS LS358 TO-78 6L RoHS LS358 PDIP 8L RoHS LS358 SOIC 8L RoHS LS358 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 JFETs for VC Circuits Introduction Linear Integrated Systems manufactures a variety of FETs (Field Effect Transistors). In particular they have a variety of matched dual products. There are advantages in having matched devices. For example, if you are building a twochannel stereo audio product, having two or four devices in the same package allows for the two audio channels to be more closely matched. This paper will explore using FETs in voltage controlled circuits. Several approaches will be shown: 1. Using FETs as voltage controlled resistors. 2. Using FETs as voltage controlled amplifiers and active mixers. 3. Using FETs as voltage controlled phase shifters for processing music. 4. Using FETs as voltage controlled band pass filters. We will also explore ways to reduce nonlinearities or distortions and automatically bias the FETs. Read More

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 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

SINGLE, LOW NOISE, HIGH GAIN, N-CHANNEL JFET AMPLIFIER < Back J/SST201 Series SINGLE, LOW NOISE, HIGH GAIN, N-CHANNEL JFET AMPLIFIER The J/SST201 Series Single, Low Noise, High Gain, N-Channel JFET Amplifier is a direct replacement for the Fairchild, NXP, and Siliconix-Vishay equivalent part. It is ideal for High Gain, Low Noise Applications. Available in the 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: J201 TO-92 3L RoHS J202 TO-92 3L RoHS J204 TO-92 3L RoHS SST201 SOT-23 3L RoHS SST202 SOT-23 3L RoHS SST204 SOT-23 3L RoHS J201 Die J202 Die J204 Die Datasheet Spice Model Application Notes

< Back Cloud Microphones Linear Systems Mar 17, 2023 Keeping the Family Business Going Cloud Microphones Among the more lamented departures from the world of electronics was RCA's microphone business. A few years ago I visited the college radio station where I'd worked in the 80s, and one of my former professors was proudly showing off an RCA 44A ribbon microphone the school had acquired. Though it had a few dents and scratches, it was a work of art. Soon after I saw it, the university's music department borrowed the mic for recording sessions and never gave it back. A typical RCA 44A ribbon microphone(Source: Wikipedia) Like original McIntosh MC275 amps, old ribbon microphones are collected because, when used correctly, they produce sounds hard to get elsewhere. But eventually even the vintage electronics section of eBay runs dry.One of the companies helping to provide new ribbon microphones and preamps, Cloud Microphones, has been able to continue the work RCA did through collaboration between a musician/businessman, Rodger Cloud, and Stephen Sank, son of RCA's ribbon microphone designer Jon R. Sank.Jon Sank had done design work at RCA that included the BK-10A and the BK-11. When he passed away in 1998, he left Stephen with the knowledge and other tools to continue the ribbon microphone work that RCA had left behind.Cloud came to Tucson as a singer/songwriter and started getting involved with bands and recording music. Sank moved into an office suite next door to Cloud's studio, and in 2006 they started working together.“So we collaborated on the initial designs of some of the mics, and I worked with him first refurbishing the vintage mics and so forth, and I really fell in love with the technology as it was in the 1930s and 1940s. It was just pretty darn great,” Cloud told me. “However, there were certainly challenges with the technology, most notably those types of microphones had a really weak sensitivity and are really difficult to deal with in terms of amplifying them.”Cloud said that even with exceptional amplifiers, it was very difficult to use ribbon microphones to record some softer sounds because of the gain requirements. This led Sank and Cloud to develop the JRS-34 ribbon microphone, named in honor of Sank's father and noting the year he was born. Rodger Cloud with his version of the RCA mic “As we worked on it, I really felt the need for an active microphone,” Cloud said. “And we really pushed ourselves to come up with something. We weren't just coming up with something that was OK. It had to be absolutely audiophile quality.” The result was a ribbon microphone that uses a Linear Systems LSK389 monolithic dual n-channel JFET to amplify the signal. Cloud wanted a dual JFET that would provide common-mode rejection in his amplifier, and settled on the LSK389. “It's just the JFET that we like the best. The power requirements for the circuit are low. We tested all of them, and this is the one that seemed to give us the results we were looking for.”Wiley Ross, who runs the recording studio at the University of Arizona, is a big fan of the Cloud's gear. “I use the Cloudlifter almost always when recording from a passive microphone,” he wrote in a recent email to me.“I don't use it because I need the gain, I have plenty with my Millennia Media HV-3R, but because the sound is better; richer, more depth,” Ross wrote. “With the Cloudlifter Z it's like having your mic locker expand to do all the different sonic possibilities afforded.”Ross added that Cloud's JRS-34 is a “main-stay” ribbon microphone. “I love it on all wind and brass instruments. Listening tests with other fine ribbons with faculty, students, and staff confirm its superiority.” The Cloudlifter Using a JFET-based circuit wasn't an obvious solution at first, Cloud said. “We were looking at several options with the microphones, and I was the one who suggested that we try the JFET technology. We were also looking at chip-based technology, different ways we could activate the mic. One of the problems with a chip-based design was we were going to have to use a couple of nine-volt batteries. We just couldn't figure out a way to get it to work on the phantom.”Using the Linear Systems' LSK389, which combines ultra-low noise with low IDSS , enabled Cloud and Sank to build a phantom-powered active ribbon microphone. Cloud said the prototype of the active circuitry was set up in a test box to enable testing various microphones. “And it only took a few moments to realize that this box is cool. And that's how the Cloudlifter accidently came to be.”The Cloudlifter is the active part of the company's ribbon microphone broken out into a format that can be used with many microphones people already have, and it soon became the company's best-selling product. “It's a game-changer, or more accurately a 'gain-changer,' because it allows people to use microphones that they normally would not even consider for softer sources, acoustic instruments, because the problem in the past has always been defeating the noise floor of the preamplifier.”The Cloudlifter is a standalone product customers could use to boost the gain of other microphones. It plugs into the line coming from a microphone and uses any standard phantom powered microphone input device to provide up to 25dB of “ultra-clean, transparent gain.”The Cloudlifter is recommended for: recording direct into a digital audio workstation interface; working with noisy or low gain preamps; using mixers/preamps that impair the sound at higher gain settings; working with passive ribbon microphones or low-output dynamic microphones; capturing softer sound sources such as acoustic instruments and voice; and when using long cable runs.When Cloud and his colleagues were first designing the circuit, they used Toshiba JFETs. “We found out about Linear Systems' products so we tried and we compared it,” says Cloud. “We liked it better than Toshiba. It was still an improvement, and I liked what it did for the Cloudlifter — it seemed to drop the noise floor even further, which is always a good thing when you're dealing with really low-sensitivity microphones.”Cloud said that after sales increased for the Cloudlifter, it became too labor intensive to match the single LSK170 JFETs. “It was becoming almost a full-time job to hand-match these little JFETs, so we started looking at the duals, and we went to the surface-mount technology, and I've got to say the Linear Systems duals are awesome. We can't match them that closely by hand, and the failure rate of the entire card as a whole is less than one in a thousand now. And we couldn't achieve that making them by hand.”The common-mode rejection enables the Cloudlifter to “pass clean audio in the worst of circumstances, next to a radio tower, in EMI hell,” according to Cloud.

< 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