LTM2883 Datasheet, PDF (1/36 Pages) Linear Technology – SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power

LTM2883
SPI/Digital or I²C µModule
Isolator with Adjustable ±12.5V
and 5V Regulated Power
Features
Description
n _{UL Rated 6-Channel Logic Isolator: 2500VRMS}
UL Recognized File #E151738
®
n _{Isolated Adjustable DC Power:}
3V to 5V at Up to 30mA
±12.5V at Up to 20mA
n _{No External Components Required}
n _{SPI (LTM2883-S) or I}²_{C (LTM2883-I) Options}
n _{High Common Mode Transient Immunity: 30kV/μs}
n _{High Speed Operation:}
10MHz Digital Isolation
4MHz/8MHz SPI Isolation
400kHz I²C Isolation
n _{3.3V (LTM2883-3) or 5V (LTM2883-5) Operation}
n _{1.62V to 5.5V Logic Supply}
n _{±10kV ESD HBM Across the Isolation Barrier}
n _{Common Mode Working Voltage: 560VPEAK}
n _{Low Current Shutdown Mode (<10µA)}
n _{Low Profile (15mm × 11.25mm × 3.42mm)}
BGA Package
Applications
n _{Isolated SPI or I}²_{C Interfaces}
n _{Industrial Systems}
n _{Test and Measurement Equipment}
n _{Breaking Ground Loops}
The LTM^®2883 is a complete galvanic digital µModule^®
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 ±12.5V and 5V nominal power
supplies, each capable of providing more than 20mA of
load current. Each supply may be adjusted from its nominal
value using a single external resistor.
Coupled inductors and an isolation power transformer
provide 2500V_RMS of isolation between the input and out-
put 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.
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
and Easy Drive, Hot Swap, SoftSpan and TimerBlox are trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
Typical Application
Isolated 4MHz SPI Interface
LTM2883-5S
5V
V_CC
V_L
ON
V_CC2
AV_CC2
V⁺
AV⁺
V^–
AV^–
SDOE
CS
CS
SDI
SDI
SCK
SCK
DO2
SDO
SDO
DO1
CS2
SDI2
SCK2
I2
SDO2
I1
GND
GND2
5V AT 20mA
12.5V AT 20mA
–12.5V AT 15mA
CS
SDI
SCK
SDO
2883 TA01a
LTM2883 Operating Through 35kV/µs CM Transient
SCK
SD0
SCK2 = SD02
2V/DIV
2V/DIV
REPETITIVE
COMMON MODE
TRANSIENTS
200V/DIV
20ns/DIV
2883 TA01b
2883f
1