Features

• 6-Channel Logic Isolator: 2500V_RMS 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: 560V_PEAK
• Low Current Shutdown Mode (<10μA)
• Low Profile 15mm × 11.25mm × 3.42mm BGA Package

Typical Application

Description

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 2500V_RMS 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.