Designed to prevent ground-to-ground differential and common-mode transients in 3.3V or 5V applications, Linear Technology Corporation introduces LTM2889, a new, fully compliant with ISO 11898-2 standard CAN (Controller Area Network) µModule (micro-module) transceivers and isolators.
In an actual CAN system, the ground potential between each node is very different and usually exceeds the allowable range, which may cause communication interruption or damage to the transceiver. The LTM2889 isolates the CAN transceiver to isolate ground by using internal inductive isolation. It implements multiple protection levels to significantly improve system reliability, including 2500VRMS galvanic isolation, ± 60V bus voltage fault tolerance, common-mode transient immunity greater than 30kV / µs, and HBM ESD protection of ± 25kV. The LTM2889 requires no external components, ensuring a complete, robust µModule solution for isolated serial data communication.
The LTM2889 has an integrated, low-EMI DC-DC converter that powers the isolated transceiver and provides CAN node components with up to 0.75W of isolated power. In addition to many built-in protection mechanisms, the device has an extended common-mode range of ± 36V, allowing operation in noisy electrical environments and in the presence of ground loops. The LTM2889 operates at data rates from 22kbps to 4Mbps and has an adjustable slew rate to reduce EMI at lower data rates. Shutdown mode makes all outputs of the LTM2889 high impedance and reduces power consumption to less than 1µA.
The LTM2889 is available in commercial, industrial and automotive temperature grades and is available in a flat 15mm x 11.25mm x 3.42mm surface mount BGA package. The company said that all integrated circuits and passive components are packaged in a RoHS-compliant µModule.
