µModule Isolated Transceivers

Linear Technology’s Isolated Transceivers provide robust galvanic isolation for various digital serial communication interfaces, including SPI, I²C, RS485/RS422, RS232 and USB.  Isolation barriers are implemented using either inexpensive Ethernet transformers, coupling capacitors or embedded inductors.  All devices are simple to configure and feature very low EMI susceptibility and emissions, as well as high noise immunity, to preserve signal integrity.

Linear Technology’s Isolator µModule (power module) Technology (found in the LTM28xx isolator series) is a new development platform that allows Linear to reliably integrate inductive/magnetic isolation, discrete components, ICs and power onto a single substrate PCB.  This high level of integration results in products that require no external components; all resistors, capacitors, inductors and ICs are onboard.  Any application from signaling to sampling can be supported by the platform, delivering isolation to even non-traditional applications.  High power levels (up to 2.5W), supported by low ripple regulation, a cored power transformer that reduces radiated emissions, and better-than-average efficiency up to 65%, are available to the application. Not only is the device self-powered, but it also provides external isolated power for other neighboring functions. To achieve isolation up 3500V_RMS, the technology uses coupled signal inductors embedded in our µModule substrate. This technique ensures consistent ruggedness and reliability.  This platform is certified by safety houses, including UL, CSA and IEC to guarantee the isolation barrier’s effectiveness.

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