LTM2887

PRODUCTION

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

Data Sheet (Rev. D) Product Selection Table
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Overview

  • 6-Channel Logic Isolator: 2500VRMS for 1 Minute
  • UL-CSA Recognized File #E151738
  • 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 (LTM2887-S) or 3V to 5.5V (LTM2887-I) 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

The LTM2887 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.

APPLICATIONS

  • Isolated SPI or I2C Interfaces
  • Industrial Systems
  • Test and Measurement Equipment
  • Breaking Ground Loops
LTM2887
SPI/Digital or I2C μModule Isolator with Dual Adjustable 5V Regulators
Isolated 4MHz SPI Interface LTM2887 Operating Through 50kV/μs CM Transients Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 2

Safety and Regulatory Compliance 1

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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Isolators 1
LTM2892
PRODUCTION SPI/Digital or I2C μModule Isolator
MOSFET & Gate Drivers 1
LTM9100
PRODUCTION Anyside™ High Voltage Isolated Switch Controller with I2C Command and Telemetry
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Evaluation Kits

eval board
schematic 1
DC1791A-B

LTM2887-5S Demo Board | SPI µModule Isolator (5.0V Supply)

Buy Now View Details

Product Details

Demonstration circuit 1791A is a serial peripheral interface bus (SPI) or inter-IC bus (I2C) μModule isolator with dual adjustable 5V regulators featuring the LTM2887. The demo circuit features an EMI optimized circuit configuration and printed circuit board layout. All components are integrated into the μModule isolator. The demo circuit operates from a single external supply on VCC. The part generates output voltages on VCC2 and VL2 which may be adjusted by external programming resistors. It communicates all necessary signaling across the isolation barrier through LTC’s isolator μModule technology.


 


eval board
schematic 2
DC1791A-A

LTM2887-3S Demo Board | SPI µModule Isolator (3.3V Supply)

Buy Now View Details

Product Details

Demonstration circuit 1791A is a serial peripheral interface bus (SPI) or inter-IC bus (I2C) μModule isolator with dual adjustable 5V regulators featuring the LTM2887. The demo circuit features an EMI optimized circuit configuration and printed circuit board layout. All components are integrated into the μModule isolator. The demo circuit operates from a single external supply on VCC. The part generates output voltages on VCC2 and VL2 which may be adjusted by external programming resistors. It communicates all necessary signaling across the isolation barrier through LTC’s isolator μModule technology.


 


eval board
schematic 3
DC1791A-D

LTM2887-5I Demo Board | I2C µModule Isolator (5.0V Supply)

Buy Now View Details

Product Details

Demonstration circuit 1791A is a serial peripheral interface bus (SPI) or inter-IC bus (I2C) μModule isolator with dual adjustable 5V regulators featuring the LTM2887. The demo circuit features an EMI optimized circuit configuration and printed circuit board layout. All components are integrated into the μModule isolator. The demo circuit operates from a single external supply on VCC. The part generates output voltages on VCC2 and VL2 which may be adjusted by external programming resistors. It communicates all necessary signaling across the isolation barrier through LTC’s isolator μModule technology.

eval board
schematic 4
DC1791A-C

LTM2887-3I Demo Board | I2C µModule Isolator (3.3V Supply)

Buy Now View Details

Product Details

Demonstration circuit 1791A is a serial peripheral interface bus (SPI) or inter-IC bus (I2C) μModule isolator with dual adjustable 5V regulators featuring the LTM2887. The demo circuit features an EMI optimized circuit configuration and printed circuit board layout. All components are integrated into the μModule isolator. The demo circuit operates from a single external supply on VCC. The part generates output voltages on VCC2 and VL2 which may be adjusted by external programming resistors. It communicates all necessary signaling across the isolation barrier through LTC’s isolator μModule technology.


 
DC1791A-B
LTM2887-5S Demo Board | SPI µModule Isolator (5.0V Supply)
DC1791A - Schematic
DC1791A-A
LTM2887-3S Demo Board | SPI µModule Isolator (3.3V Supply)
DC1791A - Schematic
DC1791A-D
LTM2887-5I Demo Board | I2C µModule Isolator (5.0V Supply)
DC1791A - Schematic
DC1791A-C
LTM2887-3I Demo Board | I2C µModule Isolator (3.3V Supply)
DC1791A - Schematic

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