(micromodule) isolator. No external components are re-
quired. Individual 3V to 5.5V supplies power each side of
the digital isolator. Separate logic supply pins allow easy
interfacing with different logic levels from 1.62V to 5.5V,
independent of the main supply.
Module options are available with compatibility to SPI
(LTM2892-S) and I
2
C (LTM2892-I), master mode only,
specifications.
Coupled inductors provide 3500V
RMS
of isolation between
the input and output logic interface. This device is ideal
for systems where the ground loop is broken, allowing
uninterrupted communication through large common
mode transients faster than 50kV/μs.
L,
LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks
and HotSwap is a trademark of of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
n
n
n
n
n
n
6-Channel Logic Isolator: 3500V
RMS
for 1 Minute
UL-CSA Recognized
File #E151738
3V to 5.5V Supply Operation
No External Components Required
SPI/Digital (LTM2892-S) or I
2
C (LTM2892-I) Options
High Common Mode Transient Immunity: 50kV/μs
High Speed Operation:
n
10MHz Digital Isolation
n
4MHz/8MHz SPI Isolation
n
400kHz I
2
C Isolation
Operation Up to 125°C (H-Grade)
1.62V to 5.5V Logic Supplies for Flexible Digital Inter-
facing
±15kV ESD HBM Across the Isolation Barrier
Maximum Continuous Working Voltage: 850V
PEAK
Low Current Shutdown Mode (<10µA)
Small (9mm × 6.25mm × 2.91mm) BGA Package
applicaTions
n
n
n
n
Isolated SPI or I
2
C Interfaces
Industrial Systems
Test and Measurement Equipment
Breaking Ground Loops
Typical applicaTion
Isolated 4MHz SPI Interface
3V TO 5.5V
V
CC1
V
L1
ON1
EOUTD
INA
INB
INC
OUTD
OUTE
OUTF
GND1
LTM2892-S
VCC2
VL2
ON2
EOUTA
OUTA
OUTB
OUTC
IND
INE
INF
GND2
2892 TA01a
LTM2892 Operating Through 50kV/µs CM Transients
3V TO 5.5V
5V/DIV
5V/DIV
SCK
MOSI
SS
MISO
200V/
DIV
20ns/DIV
OUTA CONNECTED TO IND
GND2-GND1
INA
OUTD
SCK
MOSI
SS
MISO
ISOLATION BARRIER
2892 TA01b
2892fa
For more information
www.linear.com/LTM2892
1
LTM2892
absoluTe MaxiMuM raTings
(Note 1)
V
CC1
to GND1 ............................................... –0.3V to 6V
V
L1
to GND1 ................................................. –0.3V to 6V
V
CC2
to GND2 ............................................... –0.3V to 6V
V
L2
to GND2................................................. –0.3V to 6V
Logic Inputs
INA, INB, INC, SCLIN, SDA1,
EOUTD,
ON1 to GND1 ............................ –0.3V to (V
L1
+ 0.3V)
INB, INC, IND, INE, INF, SDA2,
EOUTA,
ON2 to GND2 ............................–0.3V to (V
L2
+ 0.3V)
Logic Outputs
OUTB, OUTC, OUTD, OUTE,
OUTF to GND1 ......................... – 0.3V to (V
L1
+ 0.3V)
OUTA, OUTB, OUTC,
SCLOUT to GND2..................... – 0.3V to (V
L2
+ 0.3V)
Operating Temperature Range (Note 4)
LTM2892C ............................................... 0°C to 70°C
LTM2892I ............................................–40°C to 85°C
LTM2892H ......................................... –40°C to 125°C
Maximum Internal Operating Temperature............ 125°C
Storage Temperature Range .................. –55°C to 150°C
Peak Body Reflow Temperature ............................ 260°C
pin conFiguraTion
LTM2892-I
LTM2892-S
TOP VIEW
1
2
3
INA
4
ON1
5
V
L1
6
V
CC1
TOP VIEW
1
INA
A
B
2
INB
3
INC
4
ON1
5
V
L1
6
V
CC1
SCLIN SDA1
A
B
C
D
E
F
G
OUTB SDA1 OUTC
GND1
C
D
E
F
G
SCLOUT SDA2 OUTA
GND2
OUTD OUTE
OUTF
EOUTD
GND1
OUTA
H
J
OUTB OUTC
EOUTA
GND2
H
J
INB
SDA2
INC
ON2
V
L2
V
CC2
IND
INE
INF
ON2
V
L2
V
CC2
BGA PACKAGE
24-PIN (9mm
×
6.25mm
×
2.91mm)
T
JMAX
= 125°C,
θ
JA
= 30°C/W,
θ
JC(bottom)
= 15.7°C/W,
θ
JC(top)
= 25°C/W,
θ
JB
= 14.5°C/W
θ
VALUES DETERMINED PER JESD 51-9, WEIGHT = 0.3g
BGA PACKAGE
24-PIN (9mm
×
6.25mm
×
2.91mm)
T
JMAX
= 125°C,
θ
JA
= 30°C/W,
θ
JC(bottom)
= 15.7°C/W,
θ
JC(top)
= 25°C/W,
θ
JB
= 14.5°C/W
θ
VALUES DETERMINED PER JESD 51-9, WEIGHT = 0.3g
2
2892fa
For more information
www.linear.com/LTM2892
LTM2892
orDer inForMaTion
LEAD FREE FINISH
LTM2892CY-I#PBF
LTM2892IY-I#PBF
LTM2892HY-I#PBF
LTM2892CY-S#PBF
LTM2892IY-S#PBF
LTM2892HY-S#PBF
TRAY
LTM2892CY-I#PBF
LTM2892IY-I#PBF
LTM2892HY-I#PBF
LTM2892CY-S#PBF
LTM2892IY-S#PBF
LTM2892HY-S#PBF
http://www.linear.com/product/LTM2892#orderinfo
PART MARKING*
LTM2892Y-I
LTM2892Y-I
LTM2892Y-I
LTM2892Y-S
LTM2892Y-S
LTM2892Y-S
PACKAGE DESCRIPTION
24-Lead (9mm
×
6.25mm
×
2.91mm) BGA
24-Lead (9mm
×
6.25mm
×
2.91mm) BGA
24-Lead (9mm
×
6.25mm
×
2.91mm) BGA
24-Lead (9mm
×
6.25mm
×
2.91mm) BGA
24-Lead (9mm
×
6.25mm
×
2.91mm) BGA
24-Lead (9mm
×
6.25mm
×
2.91mm) BGA
TEMPERATURE RANGE
0°C to 70°C
–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
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
This product is only offered in trays. For more information go to:
http://www.linear.com/packaging/
This product is moisture sensitive. For more information go to:
http://www.linear.com/packaging/
elecTrical characTerisTics
SYMBOL
V
CC1
, V
CC2
V
L1
, V
L2
I
CC1
, I
CC2
I
L1
, I
L2
PARAMETER
Input Supply Range
Logic Supply Range
Input Supply Current
Logic Supply Current
LTM2892-S
LTM2892-I
CONDITIONS
Power Supplies
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC1
= 5V, V
CC2
= 5V, V
L1
= 3.3V, V
L2
= 3.3V, GND1 = GND2 = 0V,
ON1 = V
L1
, and ON2 = V
L2
unless otherwise noted. Specifications apply to all options unless otherwise noted.
MIN
l
l
l
l
l
l
l
TYP
MAX
5.5
5.5
5.5
UNITS
V
V
V
µA
mA
µA
µA
µA
µA
V
V
V
V
µA
mV
V
3
1.62
3
0
3.2
0
10
ON1 = ON2 = 0V
ON1 = V
L1
, ON2 = V
L2
ON1 = ON2 = 0V
LTM2892-S, ON1 = V
L1
, ON2 = V
L2
I
L1
, LTM2892-I, ON1 = V
L1
, ON2 = V
L2
I
L2
, LTM2892-I, ON1 = V
L1
, ON2 = V
L2
ON1, INx,
EOUTD,
1.62V ≤ V
L1
< 2.35V
ON1, INx,
EOUTD,
2.35V ≤ V
L1
ON2, INx,
EOUTA,
1.62V ≤ V
L2
< 2.35V
ON2, INx,
EOUTA,
2.35V ≤ V
L2
(Note 2)
OUTx, I
LOAD
= –1mA, 1.62V ≤ V
L1
< 3V
OUTx, I
LOAD
= –4mA, 3V ≤ V
L1
≤ 5.5V
OUTB (LTM2892-I), I
LOAD
= –2mA, 3V ≤ V
L1
≤ 5.5V
OUTx, I
LOAD
= –1mA, 1.62V ≤ V
L2
< 3V
OUTx, I
LOAD
= –4mA, 3V ≤ V
L2
≤ 5.5V
10
4.5
10
150
300
0.75•V
L1
0.67•V
L1
0.75•V
L2
0.67•V
L2
±1
Logic/SPI
V
ITH
Input Threshold Voltage
l
l
l
l
l
0.25•V
L1
0.33•V
L1
0.25•V
L2
0.33•V
L2
150
I
INL
V
HYS
V
OH
Input Current
Input Hysteresis
Output High Voltage
l
V
L1
– 0.4
V
L2
– 0.4
l
V
2892fa
For more information
www.linear.com/LTM2892
3
LTM2892
elecTrical characTerisTics
SYMBOL
V
OL
PARAMETER
Output Low Voltage
CONDITIONS
OUTx, I
LOAD
= 1mA, 1.62V ≤ V
L1
< 3V
OUTx, I
LOAD
= 4mA, 3V ≤ V
L1
≤ 5.5V
OUTB (LTM2892-I), I
LOAD
= 2mA, 3V ≤ V
L1
≤ 5.5V
OUTx, I
LOAD
= 1mA, 1.62V ≤ V
L2
< 3V
OUTx, I
LOAD
= 4mA, 3V ≤ V
L2
≤ 5.5V
I
SC
I
2
C
V
IL
V
IH
I
INL
V
HYS
V
OH
V
OL
C
IN
C
B
Low Level Input Voltage
High Level Input Voltage
Input Current
Input Hysteresis
Output High Voltage
Output Low Voltage
SCLIN, SDA1
SDA2
SCLIN, SDA1
SDA2
SCLIN, SDA1 = V
L1
or 0V
SDA2 = V
L2
, SDA2 = V
L2
= 0V
SCLIN, SDA1
SDA2
SCLOUT, I
LOAD
= –2mA
SDA1, I
LOAD
= 3mA, SCLOUT, I
LOAD
= 2mA
SDA2 = No Load, SDA1 = 0V, 4.5V ≤ V
L2
< 5.5V
SDA2 = No Load, SDA1 = 0V, 3V ≤ V
L2
< 4.5V
SCLIN, SDA1, SDA2 (Note 2)
SCLOUT, Standard Speed (Note 2)
SCLOUT, Fast Speed
SDA1, SDA2, SR ≥ 1V/μs, Standard Speed (Note 2)
SDA1, SDA2, SR ≥ 1V/μs, Fast Speed
SDA2 = 0, SDA1 = V
L1
0V ≤ SCLOUT ≤ V
L2
SDA1 = 0, SDA2 = V
L2
SDA1 = V
L1
, SDA2 = 0
GND2 to GND1
(V
CC2
, V
L2
, GND2) to (V
CC1
, V
L1
, GND1)
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC1
= 5V, V
CC2
= 5V, V
L1
= 3.3V, V
L2
= 3.3V, GND1 = GND2 = 0V,
ON1 = V
L1
, and ON2 = V
L2
unless otherwise noted. Specifications apply to all options unless otherwise noted.
MIN
TYP
MAX
0.4
UNITS
V
l
l
0.4
±85
±85
0.3•V
L1
0.3•V
L2
0.7•V
L1
0.7•V
L2
±1
±1
0.05•V
L1
0.05•V
L2
V
L2
– 0.4
0.3
0.4
0.45
0.55
10
400
200
400
200
1
±30
6
–1.8
±15
±10
100
V
mA
mA
mA
V
V
V
V
µA
µA
mV
mV
V
V
V
V
pF
pF
pF
pF
pF
V/µs
mA
mA
mA
mA
kV
kV
Short-Circuit Current
0V ≤ OUTx ≤ V
L1
0V ≤ OUTB (LTM2892-I) ≤ V
L1
0V ≤ OUTx ≤ V
L2
±30
l
Input Pin Capacitance
Bus Capacitive Load
SDA, SDA2 Slew Rate
I
SC
Short-Circuit Current
ESD (HBM)
(Note 2)
Isolation Boundary
4
2892fa
For more information
www.linear.com/LTM2892
LTM2892
swiTching characTerisTics
SYMBOL
Logic/SPI
Maximum Data Rate
INx
→
OUTx, C
L
= 15pF (Note 3)
Bidirectional SPI Communication
Unidirectional SPI Communication
INx
→
OUTx, C
L
= 15pF (Figure 1)
OUTx, C
L
= 15pF (Figure 1)
LTM2892-I, OUTB, C
L
= 15pF (Figure 1)
OUTB, OUTC, OUTE, OUTF (Note 2)
EOUTx
=
↓
to OUTx, R
L
= 1k, C
L
= 15pF (Figure 2)
EOUTx
=
↑
to OUTx, R
L
= 1k, C
L
= 15pF (Figure 2)
ONx =
↑
to OUTx, R
L
= 1k, C
L
= 15pF (Figure 4)
ONx =
↓
to OUTx, R
L
= 1k, C
L
= 15pF (Figure 4)
(Note 3)
SCLIN
→
SCLOUT, C
L
= 15pF (Figure 1)
SDA1
→
SDA2, R
L
= Open, C
L
= 15pF (Figure 3)
SDA2
→
SDA1, R
L
= 1.1k, C
L
= 15pF (Figure 3)
SDA2, C
L
= 200pF (Figure 3)
SDA2, C
L
= 200pF (Figure 3)
SDA1, R
L
= 1.1k, C
L
= 200pF (Figure 3)
SCLOUT, C
L
= 200pF (Figure 3)
SDA2, C
L
= 200pF (Figure 3)
SDA1, R
L
= 1.1k, C
L
= 200pF (Figure 3)
SCLOUT, C
L
= 200pF (Figure 3)
SDA1, SDA2 (Note 2)
ON1 =
↑
to SDA1, R
L
= 1k, C
L
= 15pF (Figure 4)
ON2 =
↑
to (SCLOUT, SDA2), C
L
= 15pF (Figure 4)
ON1 =
↓
to SDA1, R
L
= 1k, C
L
= 15pF (Figure 4)
ON2 =
↓
to SCLOUT, R
L
= 1k, C
L
= 15pF (Figure 4)
ON2 =
↓
to SDA2, R
L
= Open, C
L
= 15pF (Figure 4)
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC1
= 5V, V
CC2
= 5V, V
L1
= 3.3V, V
L2
= 3.3V, GND1 = GND2 = 0V,
ON1 = V
L1
, and ON2 = V
L2
unless otherwise noted. Specifications apply to all options unless otherwise noted.
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