LTM2886
2
SPI/Digital or I C Module
Isolator with Fixed 5V and
Adjustable 5V Regulated Power
FEATURES DESCRIPTION
n
6-Channel Logic Isolator: 2500V for 1 Minute The LTM 2886 is a complete galvanic digital Module
RMS
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UL-CSA Recognized File #E151738 (micromodule) isolator. No external components are
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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
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5V Fixed at Up to 100mA converter. A logic supply pin allows easy interfacing with
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No External Components Required different logic levels from 1.62V to 5.5V, independent of
2
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SPI/Digital (LTM2886-S) or I C (LTM2886-I) Options the main supply.
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High Common Mode Transient Immunity: 30kV/s
2
Available options are compliant with SPI and I C (master
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High Speed Operation:
mode only) specifications.
n
10MHz Digital Isolation
n The isolated side includes fixed 5V and 5V adjustable
4MHz/8MHz SPI Isolation
2
n power supplies, each capable of providing more than
400kHz I C Isolation
n 100mA of load current. The 5V adjustable supply may be
3.3V (LTM2886-3) or 5V (LTM2886-5) Operation
n programmed via an external voltage divider.
1.62V to 5.5V Logic Supply
n
10kV ESD HBM Across the Isolation Barrier
Coupled inductors and an isolation power transformer
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Maximum Continuous Working Voltage: 560V
PEAK
provide 2500V of isolation between the input and out-
RMS
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Low Current Shutdown Mode (<10A)
put logic interface. This device is ideal for systems where
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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/s.
2
n L, LT, LTC, LTM, Linear Technology, the Linear logo and Module are registered trademarks of
Isolated SPI or I C Interfaces
Analog Devices, Inc. All other trademarks are the property of their respective owners.
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Industrial Systems
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Test and Measurement Equipment
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Breaking Ground Loops
TYPICAL APPLICATION
Isolated 4MHz SPI Interface LTM2886 Operating Through 50kV/s CM Transients
LTM2886-5S
V
CC2 SCK
5V AT 100mA
V
CC SD0
AV
5V
CC2
SCK2 = SD02
+ 5V/DIV
V
V
L
5V AT 100mA
ON
V
5V AT 100mA
REPETITIVE
COMMON MODE
TRANSIENTS
SDOE
GND2 TO GND
CS CS2
CS CS
SDI SDI2
SDI SDI
SCK SCK2
SCK SCK
200V/DIV
2886 TA01b
DO2 I2
20ns/DIV
SDO SDO2
SDO SDO
DO1 I1
GND GND2
2886 TA01a
2886fb
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For more information www.linear.com/LTM2886
ISOLATION BARRIERLTM2886
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V to GND .................................................. 0.3V to 6V Logic Outputs
CC
V to GND .................................................... 0.3V to 6V DO1, DO2, SDO to GND ..............0.3V to (V + 0.3V)
L L
V , AV to GND2 ................................... 0.3V to 6V O1, SCK2, SDI2, CS2,
CC2 CC2
+
V to GND2 .................................................. 0.3V to 6V SCL2 to GND2 ........................0.3V to (V + 0.3V)
CC2
V to GND2 .................................................. 0.3V to 6V Operating Temperature Range (Note 4)
Logic Inputs LTM2886C ............................................... 0C to 70C
DI1, SCK, SDI, CS, SCL, SDA, SDOE, LTM2886I ............................................40C to 85C
ON to GND ..................................0.3V to (V + 0.3V) LTM2886H ......................................... 40C to 125C
L
I1, I2, SDA2, Maximum Internal Operating Temperature ............ 125C
SDO2 to GND2 ........................0.3V to (V + 0.3V) Storage Temperature Range .................. 55C to 125C
CC2
Peak Body Reflow Temperature ............................ 245C
PIN CONFIGURATION
LTM2886-I LTM2886-S
TOP VIEW TOP VIEW
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
DO2 DNC SCL SDA DI1 GND ON V SDO DO2 SCK SDI CS SDOE ON V
L L
A A
B B
DO1 GND V DO1 GND V
CC CC
C C
D D
E E
F F
G G
H H
J J
I1 GND2 AV GND2 I1 GND2 AV GND2
CC2 CC2
K K
L L
+ +
I2 DNC SCL2 SDA2 O1 V V V SDO2 I2 SCK2 SDI2 CS2 V V V
CC2 CC2
BGA PACKAGE BGA PACKAGE
32-PIN (15mm 11.25mm 3.42mm) 32-PIN (15mm 11.25mm 3.42mm)
T = 125C, = 25.5C/W, = 9.2C/W, T = 125C, = 25.5C/W, = 9.2C/W,
JMAX JA JC(BOTTOM) JMAX JA JC(BOTTOM)
= 16.6C/W, = 9.9C/W = 16.6C/W, = 9.9C/W
JC(TOP) JBOARD JC(TOP) JBOARD
VALUES DETERMINED PER JESD51-9, WEIGHT = 1.2g VALUES DETERMINED PER JESD51-9, WEIGHT = 1.2g
2886fb
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For more information www.linear.com/LTM2886