Datasheet LTM2886 (Analog Devices)

LTM2886 SPI/Digital or I2C µModule Isolator with Fixed ±5V and Adjustable 5V Regulated Power
FEATURES DESCRIPTION
n
6-Channel Logic Isolator: 2500VRMS for 1 Minute
The LTM®2886 is a complete galvanic digital µModule® n
UL-CSA Recognized File #E151738
(micromodule) isolator. No external components are n
Isolated DC Power:
required. A single 3.3V or 5V supply powers both sides n
3V to 5V Adjustable at Up to 100mA
of the interface through an integrated, isolated DC/DC n
±5V Fixed at Up to 100mA
converter. A logic supply pin allows easy interfacing with n
No External Components Required
different logic levels from 1.62V to 5.5V, independent of n
SPI/Digital (LTM2886-S) or I2C (LTM2886-I) Options
the main supply. n
High Common Mode Transient Immunity: 30kV/μs
Available options are compliant with SPI and I2C (master n
High Speed Operation:
mode only) specifications. n
10MHz Digital Isolation
n
4MHz/8MHz SPI Isolation
The isolated side includes fixed ±5V and 5V adjustable n
400kHz I2C Isolation
power supplies, each capable of providing more than n 3.3V (LTM2886-3) or 5V (LTM2886-5) Operation 100mA of load current. The 5V adjustable supply may be n 1.62V to 5.5V Logic Supply programmed via an external voltage divider. n ±10kV ESD HBM Across the Isolation Barrier Coupled inductors and an isolation power transformer n Maximum Continuous Working Voltage: 560VPEAK provide 2500VRMS of isolation between the input and out- n Low Current Shutdown Mode (<10µA) put logic interface. This device is ideal for systems where n Low Profile (15mm × 11.25mm × 3.42mm) BGA Package the ground loop is broken, allowing for a large common mode voltage range. Communication is uninterrupted for
APPLICATIONS
common mode transients greater than 30kV/μs. n L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of Isolated SPI or I2C Interfaces Analog Devices, Inc. All other trademarks are the property of their respective owners. n Industrial Systems n Test and Measurement Equipment n Breaking Ground Loops
TYPICAL APPLICATION Isolated 4MHz SPI Interface LTM2886 Operating Through 50kV/µs CM Transients
LTM2886-5S VCC2 SCK VCC 5V AT 100mA SD0 5V AVCC2 SCK2 = SD02 V 5V/DIV L V+ 5V AT 100mA ON V– –5V AT 100mA REPETITIVE COMMON MODE SDOE TRANSIENTS GND2 TO GND CS CS2 CS CS TION BARRIER SDI SDI2 SDI SDI SCK ISOLA SCK2 SCK SCK 200V/DIV DO2 I2 20ns/DIV 2886 TA01b SDO SDO2 SDO SDO DO1 I1 GND GND2 2886 TA01a 2886fb For more information www.linear.com/LTM2886 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Product Selection Guide Order Information Electrical Characteristics Switching Characteristics Isolation Characteristics Typical Performance Characteristics Pin Functions Block Diagrams Test Circuits Applications Information Typical Applications Package Description Typical Application Related Parts