ELECTRONICS: Linear Technology Corp.’s LTM2882 is a 2-channel isolated RS232 µModule® transceiver that guards against large ground-to-ground differentials and common mode transients. In practical RS232 systems, ground potentials may vary widely from node to node, often exceeding the tolerable range, resulting in an interruption of communications or destruction of a transceiver. The LTM2882 breaks ground loops by isolating the logic level interface and line transceiver using internal inductive signal isolation. This allows for a much larger common mode voltage range plus superior common mode rejection >30kV/µs. A low EMI dc-dc converter generates the power supplies for driving RS232 levels and provides an additional isolated 5V supply output for powering any supporting external components. With 2,500VRMS of galvanic isolation, onboard secondary power and two fully compliant RS232 transmitters and receivers, the LTM2882 requires no external components, providing a complete, small µModule solution for isolated serial data communications.
The LTM2882 addresses a wide range of RS232 applications, including industrial communications and test/measurement equipment, where breaking ground loops or working with large common mode voltages is demanded. The ±10kV ESD-protected transceiver operates at up to 1 Mbps and only consumes 30 µA of shutdown current when disabled. The two drivers can be enabled and disabled in less than 2 µs using the uncommitted auxiliary isolated digital channel and are protected from short-circuits to any voltage within the absolute maximum range of ±15V. Their receiver counterparts are protected from common mode voltages within the absolute maximum range of ±25V. The LTM2882 meets RF and magnetic field immunity test requirements per European standard EN 550024. The self-powered LTM2882 takes many precautions to guarantee safe and reliable communications in RS232 systems.
Two versions of the LTM2882 are available to support 3.3 and 5V input supply voltages. The LTM2882 is available in low profile 11.25 x 15 x 2.8 mm surface mount LGA and BGA packages. All integrated circuits and passive components are housed in this Linear Technology, RoHS-compliant, µModule package. Pricing starts at $8.45 each in 1,000 piece quantities.
Advertised as the "Most Powerful Tablet Under $100," the Kindle Fire HD 6 was too tempting for the team at iFixit to pass up. Join us to find out if inexpensive means cheap, irreparable, or just down right economical. It's teardown time!
The increased adoption of wireless technology for mission-critical applications has revved up the global market for dynamic electronic general purpose (GP) test equipment. As the link between cloud networks and devices -- smartphones, tablets, and notebooks -- results in more complex devices under test, the demand for radio frequency test equipment is starting to intensify.
Much of the research on lithium-ion batteries is focused on how to make the batteries charge more quickly and last longer than they currently do, work that would significantly improve the experience of mobile device users, as well EV and hybrid car drivers. Researchers in Singapore have come up with what seems like the best solution so far -- a battery that can recharge itself in mere minutes and has a potential lifespan of 20 years.
Some humanoid walking robots are also good at running, balancing, and coordinated movements in group settings. Several of our sports robots have won regional or worldwide acclaim in the RoboCup soccer World Cup, or FIRST Robotics competitions. Others include the world's first hockey-playing robot and a trash-talking Scrabble player.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.