FEATURES
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LTM2886
SPI/Digital or I
2
C µModule
Isolator with Fixed ±5V and
Adjustable 5V Regulated Power
DESCRIPTION
The
LTM
®
2886
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 I
2
C (master
mode only) specifications.
The isolated side includes fixed ±5V and 5V adjustable
power supplies, each capable of providing more than
100mA of load current. The 5V adjustable supply may be
programmed via an external voltage divider.
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 of
Analog Devices, Inc. All other trademarks are the property of their respective owners.
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6-Channel Logic Isolator: 2500V
RMS
for 1 Minute
UL-CSA Recognized
File #E151738
Isolated DC Power:
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3V to 5V Adjustable at Up to 100mA
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±5V Fixed at Up to 100mA
No External Components Required
SPI/Digital (LTM2886-S) or I
2
C (LTM2886-I) Options
High Common Mode Transient Immunity: 30kV/μs
High Speed Operation:
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10MHz Digital Isolation
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4MHz/8MHz SPI Isolation
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400kHz I
2
C Isolation
3.3V (LTM2886-3) or 5V (LTM2886-5) Operation
1.62V to 5.5V Logic Supply
±10kV ESD HBM Across the Isolation Barrier
Maximum Continuous Working Voltage: 560V
PEAK
Low Current Shutdown Mode (<10µA)
Low Profile (15mm × 11.25mm × 3.42mm) BGA Package
APPLICATIONS
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Isolated SPI or I
2
C Interfaces
Industrial Systems
Test and Measurement Equipment
Breaking Ground Loops
TYPICAL APPLICATION
Isolated 4MHz SPI Interface
LTM2886-5S
5V
V
CC
V
L
ON
ISOLATION BARRIER
V
CC2
AV
CC2
V
+
V
–
5V AT 100mA
5V AT 100mA
–5V AT 100mA
5V/DIV
LTM2886 Operating Through 50kV/µs CM Transients
SCK
SD0
SCK2 = SD02
SDOE
CS
SDI
SCK
CS
SDI
SCK
DO2
SDO
SDO
DO1
GND
CS2
SDI2
SCK2
I2
SDO2
I1
GND2
REPETITIVE
COMMON MODE
TRANSIENTS
GND2 TO GND
CS
SDI
SCK
200V/DIV
20ns/DIV
SDO
2886 TA01b
2886 TA01a
2886fb
For more information
www.linear.com/LTM2886
1
LTM2886
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
CC
to GND .................................................. –0.3V to 6V
V
L
to GND .................................................... –0.3V to 6V
V
CC2
, AV
CC2
to GND2 ................................... –0.3V to 6V
V
+
to GND2 .................................................. –0.3V to 6V
V
–
to GND2 .................................................. 0.3V to –6V
Logic Inputs
DI1, SCK, SDI,
CS,
SCL, SDA,
SDOE,
ON to GND ..................................–0.3V to (V
L
+ 0.3V)
I1, I2, SDA2,
SDO2 to GND2 ........................ –0.3V to (V
CC2
+ 0.3V)
Logic Outputs
DO1, DO2, SDO to GND ..............–0.3V to (V
L
+ 0.3V)
O1, SCK2, SDI2,
CS2,
SCL2 to GND2 ........................ –0.3V to (V
CC2
+ 0.3V)
Operating Temperature Range (Note 4)
LTM2886C ............................................... 0°C to 70°C
LTM2886I ............................................–40°C to 85°C
LTM2886H ......................................... –40°C to 125°C
Maximum Internal Operating Temperature............ 125°C
Storage Temperature Range .................. –55°C to 125°C
Peak Body Reflow Temperature ............................ 245°C
PIN CONFIGURATION
LTM2886-I
1
A
B
C
D
E
F
G
H
J
K
L
I2
DNC SCL2 SDA2 O1
V
CC2
V
–
V
+
I1
GND2
AV
CC2
GND2
DO1
GND
V
CC
2
3
TOP VIEW
4
5
DI1
6
GND
7
ON
8
V
L
A
B
C
D
E
F
G
H
J
K
L
SDO2
I2
SCK2 SDI2
CS2
V
CC2
V
–
V
+
I1
GND2
AV
CC2
GND2
DO1
GND
V
CC
DO2 DNC SCL SDA
LTM2886-S
1
2
3
TOP VIEW
4
SDI
5
6
7
8
V
L
SDO DO2 SCK
CS SDOE
ON
BGA PACKAGE
32-PIN (15mm
×
11.25mm
×
3.42mm)
T
JMAX
= 125°C,
θ
JA
= 25.5°C/W,
θ
JC(BOTTOM)
= 9.2°C/W,
θ
JC(TOP)
= 16.6°C/W,
θ
JBOARD
= 9.9°C/W
θ
VALUES DETERMINED PER JESD51-9, WEIGHT = 1.2g
BGA PACKAGE
32-PIN (15mm
×
11.25mm
×
3.42mm)
T
JMAX
= 125°C,
θ
JA
= 25.5°C/W,
θ
JC(BOTTOM)
= 9.2°C/W,
θ
JC(TOP)
= 16.6°C/W,
θ
JBOARD
= 9.9°C/W
θ
VALUES DETERMINED PER JESD51-9, WEIGHT = 1.2g
2886fb
2
For more information
www.linear.com/LTM2886
LTM2886
PRODUCT SELECTION GUIDE
LTM2886 C
Y
-3
I
#PBF
LEAD FREE DESIGNATOR
PBF = Lead Free
LOGIC OPTION
I = Inter-IC (I
2
C) Bus
S = Serial Peripheral Interface (SPI) Bus
INPUT VOLTAGE RANGE
3 = 3V to 3.6V
5 = 4.5V to 5.5V
PACKAGE TYPE
Y = Ball Grid Array (BGA)
TEMPERATURE GRADE
C = Commercial Temperature Range (0°C to 70°C)
I = Industrial Temperature Range (–40°C to 85°C)
H = Automotive Temperature Range (–40°C to 125°C)
PRODUCT PART NUMBER
ORDER INFORMATION
PART NUMBER
LTM2886CY-3I#PBF
LTM2886IY-3I#PBF
LTM2886HY-3I#PBF
LTM2886CY-3S#PBF
LTM2886IY-3S#PBF
LTM2886HY-3S#PBF
LTM2886CY-5I#PBF
LTM2886IY-5I#PBF
LTM2886HY-5I#PBF
LTM2886CY-5S#PBF
LTM2886IY-5S#PBF
LTM2886HY-5S#PBF
SAC305 (RoHS)
PAD OR BALL
FINISH
http://www.linear.com/product/LTM2886#orderinfo
PART MARKING
PACKAGE
TYPE
MSL INPUT VOLTAGE
RATING RANGE
LOGIC
OPTION
I
2
C
3V to 3.6V
TEMPERATURE
RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
SPI
e1
BGA
3
I
2
C
4.5V to 5.5V
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
SPI
–40°C to 85°C
–40°C to 125°C
• Recommended BGA PCB Assembly and Manufacturing Procedures:
www.linear.
com/BGA-assy
• BGA Package and Tray Drawings:
www.linear.com/packaging
• This product is moisture sensitive. For more information, go to:
www.linear.com/BGA-assy
DEVICE
LTM2886Y-3I
FINISH CODE
LTM2886Y-3S
LTM2886Y-5I
LTM2886Y-5S
• Device temperature grade is indicated by a label on the
shipping container.
• Pad or ball finish code is per IPC/JEDEC J-STD-609.
• Terminal Finish Part Marking:
www.linear.com/leadfree
• This product is not recommended for second side reflow. For
more information, go to
www.linear.com/BGA-assy
2886fb
For more information
www.linear.com/LTM2886
3
LTM2886
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
Input Supplies
V
CC
V
L
I
CC
I
L
Input Supply Range
Logic Supply Range
Input Supply Current
LTM2886-3
LTM2886-5
LTM2886-S
LTM2886-I
ON = 0V
LTM2886-3, No Load
LTM2886-5, No Load
ON = 0V
LTM2886-S, ON = V
L
LTM2886-I, ON = V
L
No Load, AV
CC2
OPEN
(Note 2)
I
LOAD
= 1mA, MIN ≤ V
CC
≤ MAX
I
LOAD
= 1mA to 100mA
I
LOAD
= 1mA to 100mA
I
LOAD
= 100mA (Note 2)
LTM2886-5, I
LOAD
= 100mA (Note 2)
V
CC2
= 0V
ΔV
CC2
= –5%
No Load
I
LOAD
= 1mA, MIN ≤ V
CC
≤ MAX
I
LOAD
= 1mA to 100mA
I
LOAD
= 100mA (Note 2)
LTM2886-5, I
LOAD
= 100mA (Note 2)
V
+
= 0V
ΔV
+
= –5%
No Load
I
LOAD
= –1mA, MIN ≤ V
CC
≤ MAX
I
LOAD
= 1mA to 100mA
I
LOAD
= 100mA (Note 2)
LTM2886-5, I
LOAD
= 100mA (Note 2)
V
–
= 0V
ΔV
–
= 5%
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The
l
denotes the specifications which apply over the specified operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2886-3 V
CC
= 3.3V, LTM2886-5 V
CC
= 5V, V
L
= 3.3V, and GND =
GND2 = 0V, ON = V
L
unless otherwise noted. Specifications apply to all options unless otherwise noted.
CONDITIONS
MIN
3
4.5
1.62
3
TYP
3.3
5
5
0
25
19
0
10
MAX
3.6
5.5
5.5
5.5
10
37
27
10
150
5.25
5.5
2
15
1.15
1.220
1
61
150
90
4.8
5
2
35
1
61
150
90
–4.8
–5
5
35
1
61
150
90
–5.2
15
150
5.2
7.5
150
7.5
100
1.27
UNITS
V
V
V
V
µA
mA
mA
µA
µA
µA
V
V
mV
mV
V
mV
RMS
%
mA
mA
V
mV
mV
mV
RMS
%
mA
mA
V
mV
mV
mV
RMS
%
mA
mA
Logic Supply Current
Output Supplies
V
CC2
Regulated Output Voltage
Output Voltage Operating Range
Line Regulation
Load Regulation
ADJ Pin Voltage
Voltage Ripple
Efficiency
I
CC2
V
+
Output Short Circuit Current
Current Limit
Regulated Output Voltage
Line Regulation
Load Regulation
Voltage Ripple
Efficiency
I
+
V
–
Output Short Circuit Current
Current Limit
Regulated Output Voltage
Line Regulation
Load Regulation
Voltage Ripple
Efficiency
I
–
Output Short-Circuit Current
Current Limit
l
4.75
3
5
2886fb
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For more information
www.linear.com/LTM2886
LTM2886
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
Logic/SPI
V
ITH
I
INL
V
HYS
V
OH
Input Threshold Voltage
ON, DI1,
SDOE,
SCK, SDI,
CS:
1.62V ≤ V
L
< 2.35V
ON, DI1,
SDOE,
SCK, SDI,
CS:
2.35V ≤ V
L
I1, I2, SDO2
l
0.25 • V
L
l
0.33 • V
L
l
0.33 • V
CC2
l
The
l
denotes the specifications which apply over the specified operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2886-3 V
CC
= 3.3V, LTM2886-5 V
CC
= 5V, V
L
= 3.3V, and GND =
GND2 = 0V, ON = V
L
unless otherwise noted. Specifications apply to all options unless otherwise noted.
CONDITIONS
MIN
TYP
MAX
0.75 • V
L
0.67 • V
L
0.67 • V
CC2
±1
150
DO1, DO2, SDO,
I
LOAD
= –1mA, 1.62V ≤ V
L
< 3V,
I
LOAD
= –4mA, 3V ≤ V
L
≤ 5.5V
O1, SCK2, SDI2,
CS2,
I
LOAD
= –4mA
DO1, DO2, SDO,
I
LOAD
= 1mA, 1.62V ≤ V
L
< 3V,
I
LOAD
= 4mA, 3V ≤ V
L
≤ 5.5V
O1, SCK2, SDI2,
CS2,
I
LOAD
= 4mA
0V ≤ (DO1, DO2, SDO) ≤ V
L
0V ≤ (O1, SCK2, SDI2,
CS2)
≤ V
CC2
SCL, SDA
SDA2
SCL, SDA
SDA2
SCL, SDA = V
L
or 0V
SDA2 = V
CC2
, SDA2 = V
CC2
= 0V
SCL, SDA
SDA2
SCL2, I
LOAD
= –2mA
DO2, I
LOAD
= –2mA
SDA, I
LOAD
= 3mA
DO2, I
LOAD
= 2mA
SCL2, I
LOAD
= 2mA
SDA2, No Load, SDA = 0V, 4.5V ≤ V
CC2
< 5.5V
SDA2, No Load, SDA = 0V, 3V ≤ V
CC2
< 4.5V
SCL, SDA, SDA2 (Note 2)
SCL2, Standard Speed (Note 2)
SCL2, Fast Speed
SDA, SDA2, SR ≥ 1V/µs, Standard Speed (Note 2)
SDA, SDA2, SR ≥ 1V/µs, Fast Speed
SDA, SDA2
SDA2 = 0, SDA = V
L
0V ≤ SCL2 ≤ V
CC2
0V ≤ DO2 ≤ V
L
SDA = 0, SDA2 = V
CC2
SDA = V
L
, SDA2 = 0
(V
CC2
, V
+
, V
–
, GND2) to (V
CC
, V
L
, GND)
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l
l
l
l
l
l
l
l
l
l
l
UNITS
V
V
V
µA
mV
V
Input Current
Input Hysteresis
Output High Voltage
V
L
– 0.4
V
CC2
– 0.4
0.4
l
l
V
V
V
OL
Output Low Voltage
l
l
0.4
±60
±85
V
mA
mA
V
V
V
V
I
SC
I
2
C
V
IL
V
IH
I
INL
V
HYS
V
OH
V
OL
Short-Circuit Current
Low Level Input Voltage
High Level Input Voltage
Input Current
Input Hysteresis
Output High Voltage
Output Low Voltage
l
l
l
l
l
l
0.3 • V
L
0.3 • V
CC2
0.7 • V
L
0.7 • V
CC2
±1
±1
0.05 • V
L
0.05 • V
CC2
V
CC2
– 0.4
V
L
– 0.4
0.4
0.4
0.4
0.45
0.55
10
400
200
400
200
1
±30
±30
6
–1.8
±10
100
µA
µA
V
V
V
V
V
V
V
V
V
pF
pF
pF
pF
pF
V/µs
mA
mA
mA
mA
mA
kV
0.3
C
IN
C
B
Input Pin Capacitance
Bus Capacitive Load
Minimum Bus Slew Rate
I
SC
Short-Circuit Current
ESD (HBM) (Note 2)
Isolation Boundary
2886fb
For more information
www.linear.com/LTM2886
5
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