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LTM2887 - SPI/Digital or I2C μModule Isolator with Dual Adjustable 5V Regulators

The LTM®2887 is a complete galvanic digital μModule® (micromodule) isolator. No external components are required. A single 3.3V or 5V supply powers both sides of the interface through an integrated, isolated DC/DC converter. A logic supply pin allows easy interfacing with different logic levels from 1.62V to 5.5V, independent of the main supply.

Available options are compliant with SPI and I2C (master mode only) specifications.

The isolated side includes two 5V nominal power supplies, including programmable current limit, each capable of providing more than 100mA of load current. The supplies may be adjusted from their nominal value using a single external resistor.

Coupled inductors and an isolation power transformer provide 2500VRMS of isolation between the input and output logic interface. This device is ideal for systems where the ground loop is broken, allowing for a large common mode voltage range. Communication is uninterrupted for common mode transients greater than 30kV/μs.

Features 6-Channel Logic Isolator: 2500VRMS for 1 Minute UL-CSA Recognition Pending Isolated DC Power: 1.8V to 5V Logic Supply at Up to 100mA 0.6V to 5V Auxiliary Supply at Up to 100mA No External Components Required SPI/Digital (LTM2887-S) or I2C (LTM2887-I) Options High Common Mode Transient Immunity: 30kV/μs High Speed Operation: 10MHz Digital Isolation 4MHz/8MHz SPI Isolation 400kHz I2C Isolation 3.3V (LTM2887-3) or 5V (LTM2887-5) Operation 1.62V to 5.5V Logic Supply ±10kV ESD HBM Across the Isolation Barrier Maximum Continuous Working Voltage: 560VPEAK Low Current Shutdown Mode (<10μA) Low Profile 15mm × 11.25mm × 3.42mm BGA Package Typical Application

Applications Isolated SPI or I2C Interfaces Industrial Systems Test and Measurement Equipment Breaking Ground Loops Packaging

Demo Boards