Digital Isolation + Power 3.3V or 5V Isolated


No External Components Required


Power Reg


Reg Reg


LTM2883


SPI/Digital or I2C Bus


SPI/Digital or I2C Bus


5V


12.5V –12.5V


2500VRMS Galvanic Isolation SPI/I2 The LTM® 2883 is a complete digital µModule®


C µModule Isolator with 3 Adjustable Power Rails galvanic isolator. The LTM2883’s internal inductive isolation barrier breaks


ground loops by isolating the logic level interface for SPI, I2C or general purpose I/O. A low EMI DC/DC converter provides power to the internal communications interface and to three adjustable isolated power supply outputs, nominally 5V, 12.5V


and –12.5V. The LTM2883 provides a simple, highly integrated µModule solution with 2500VRMS isolation, onboard secondary power, digital communications interface and uninterrupted communication through common mode transients.


Features


 Six Channel Logic Isolator: 2500VRMS  3V to 5V at up to 30mA ±12.5V at up to 20mA


 20Mbps Digital (LTM2883-S)


     2C (LTM2883-I)


 Immunity: 30kV/µs


 


  


PEAK  


60 50 40 30 20 10 0


–10 –20 –30


0 100 200 300 400 500 600 Frequency (MHz)


, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.


www.linear.com/2883 700 EMI Performance: LTM2883 vs. Competitor A


CISPR 22 Class B Limit LTM2883 Competitor A


Devices measured on LTM2883 Demo Circuit 1748A


6dB Safety Margin


GTEM Radiated Emission Scan Corrected per IEC 61000-4-20 Detector = Peak RBW = 120kHz VBW = 300kHz Sweep Time = 680ms # of Points = 8084


800 900 1,000


dBµV/m


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