FEATURES
n
®
LTM2883
SPI/Digital or I
2
C µModule
Isolator with Adjustable ±12.5V
and 5V Regulated Power
DESCRIPTION
The
LTM
®
2883
is a complete galvanic 6-channel 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 ±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.
All registered trademarks and trademarks are the property of their respective owners.
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2500V
RMS
for One Minute per UL1577
UL Recognized
File #E151738
Isolated Adjustable DC Power:
3V to 5V at Up to 30mA
±12.5V at Up to 20mA
No External Components Required
SPI (LTM2883-S) or I
2
C (LTM2883-I) Options
High Common Mode Transient Immunity: 30kV/μs
High Speed Operation:
10MHz Digital Isolation
4MHz/8MHz SPI Isolation
400kHz I
2
C Isolation
3.3V (LTM2883-3) or 5V (LTM2883-5) 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
Isolated SPI or I
2
C Interfaces
APPLICATIONS
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Industrial Systems
Test and Measurement Equipment
Breaking Ground Loops
TYPICAL APPLICATION
Isolated 4MHz SPI Interface
LTM2883-5S
5V
V
CC
V
L
ON
ISOLATION BARRIER
V
CC2
AV
CC2
V
+
AV
+
V
–
AV
–
5V AT 20mA
12.5V AT 20mA
–12.5V AT 15mA
2V/DIV
2V/DIV
LTM2883 Operating Through 35kV/µs CM Transient
SCK
SD0
SCK2 = SD02
SDOE
CS
SDI
SCK
CS
SDI
SCK
DO2
SDO
SDO
DO1
GND
CS2
SDI2
SCK2
I2
SDO2
I1
GND2
CS
SDI
SCK
REPETITIVE
COMMON MODE
TRANSIENTS
SDO
200V/DIV
20ns/DIV
2883 TA01b
2883 TA01a
2883fd
For more information
www.linear.com/LTM2883
1
LTM2883
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
, AV
+
to GND2 ........................... –0.3V to 6V
V
+
to GND2 ................................................ –0.3V to 16V
V
–
, AV
–
to GND2 .........................................0.3V to –16V
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)
LTM2883C .........................................0°C ≤ T
A
≤ 70°C
LTM2883I ..................................... –40°C ≤ T
A
≤ 85°C
LTM2883H ...................................–40°C ≤ T
A
≤ 105°C
Maximum Internal Operating Temperature............ 125°C
Storage Temperature Range .................. –40°C to 125°C
Peak Body Reflow Temperature ............................ 245°C
PIN CONFIGURATION
LTM2883-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
AV
–
AV
+
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
AV
–
AV
+
DO1
GND
V
CC
DO2 DNC SCL SDA
LTM2883-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
= 30°C/W,
θ
JC(BOTTOM)
= 15.7°C/W,
θ
JC(TOP)
= 25°C/W,
θ
JBOARD
= 14.5°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
= 30°C/W,
θ
JC(BOTTOM)
= 15.7°C/W,
θ
JC(TOP)
= 25°C/W,
θ
JBOARD
= 14.5°C/W
θ
VALUES DETERMINED PER JESD51-9, WEIGHT = 1.2g
2883fd
2
For more information
www.linear.com/LTM2883
LTM2883
ORDER INFORMATION
PART NUMBER
LTM2883CY-3S#PBF
LTM2883IY-3S#PBF
LTM2883HY-3S#PBF
LTM2883CY-5S#PBF
LTM2883IY-5S#PBF
LTM2883HY-5S#PBF
LTM2883CY-3I#PBF
LTM2883IY-3I#PBF
LTM2883HY-3I#PBF
LTM2883CY-5I#PBF
LTM2883IY-5I#PBF
LTM2883HY-5I#PBF
• 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
4.5V TO 5.5V
LTM2883Y-5I
3V TO 3.6V
4.5V TO 5.5V
SAC305
(RoHS)
LTM2883Y-3I
LTM2883Y-5S
e1
BGA
4
3V TO 3.6V
LTM2883Y-3S
INPUT
VOLTAGE
http://www.linear.com/product/LTM2883#orderinfo
PAD OR BALL
FINISH
PART MARKING
DEVICE
FINISH CODE
PACKAGE
TYPE
MSL
RATING
TEMPERATURE
RANGE
0°C TO 70°C
–40°C TO 85°C
–40°C TO 105°C
0°C TO 70°C
–40°C TO 85°C
–40°C TO 105°C
0°C TO 70°C
–40°C TO 85°C
–40°C TO 105°C
0°C TO 70°C
–40°C TO 85°C
–40°C TO 105°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
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2883-3 V
CC
= 3.3V, LTM2883-5 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.
SYMBOL PARAMETER
Input Supplies
V
CC
V
L
I
CC
I
L
Input Supply Range
Logic Supply Range
Input Supply Current
LTM2883-3
LTM2883-5
LTM2883-S
LTM2883-I
ON = 0V
LTM2883-3, ON = V
L
, No Load
LTM2883-5, ON = V
L
, No Load
ON = 0V
LTM2883-S, ON = V
L
LTM2883-I, ON = V
L
l
l
l
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
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
35
28
10
150
UNITS
V
V
V
V
µA
mA
mA
µA
µA
µA
Logic Supply Current
2883fd
For more information
www.linear.com/LTM2883
3
LTM2883
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2883-3 V
CC
= 3.3V, LTM2883-5 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.
SYMBOL PARAMETER
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
ADJ Pin Voltage
Voltage Ripple
Efficiency
I
+
V
–
Output Short Circuit Current
Current Limit
Regulated Output Voltage
Line Regulation
Load Regulation
ADJ Pin Voltage
Voltage Ripple
Efficiency
I
–
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
(Note 2)
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
V
OL
Output Low Voltage
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
I
SC
Short-Circuit Current
0V ≤ (DO1, DO2, SDO) ≤ V
L
0V ≤ (O1, SCK2, SDI2,
CS2)
≤ V
CC2
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0.25 • V
L
l
0.33 • V
L
l
0.33 • V
CC2
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ELECTRICAL CHARACTERISTICS
CONDITIONS
No Load
(Note 2)
MIN
l
TYP
5
25
8
MAX
5.25
5.5
100
80
615
UNITS
V
V
mV
mV
mV
mV
RMS
%
mA
mA
4.75
3
I
LOAD
= 1mA, MIN ≤ V
CC
≤ MAX
I
LOAD
= 100µA to 20mA
I
LOAD
= 100µA to 20mA
I
LOAD
= 20mA (Note 2)
I
LOAD
= 20mA (Note 2)
V
CC2
= 0V
ΔV
CC2
= –5%
No Load
I
LOAD
= 1mA, MIN ≤ V
CC
≤ MAX
I
LOAD
= 100µA to 20mA
I
LOAD
= 100µA to 20mA
I
LOAD
= 20mA (Note 2)
I
LOAD
= 20mA (Note 2)
V
+
= 0V
ΔV
+
= –0.5V
No Load
I
LOAD
= –1mA, MIN ≤ V
CC
≤ MAX
I
LOAD
= 100µA to 15mA, V
+LOAD
= 1.5mA
I
LOAD
= 100µA to 15mA, V
+LOAD
= 1.5mA
I
LOAD
= 15mA, V
+LOAD
= 1.5mA (Note 2)
I
LOAD
= 15mA (Note 2)
V
–
= 0V
ΔV
–
= 0.5V, V
+
= 1.5mA
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l
585
600
1
45
45
l
l
l
l
l
20
12
12.5
5
1.170
1.220
3
45
70
13
30
200
1.260
V
mV
mV
mV
mV
RMS
%
mA
mA
l
l
l
20
–12
–12.5
4
–1.184
–1.220
2
45
30
–13
15
35
–1.256
V
mV
mV
mV
mV
RMS
%
mA
mA
l
Output Short-Circuit Current
Current Limit
l
10
15
0.75 • V
L
0.67 • V
L
0.67 • V
CC2
±1
150
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
l
l
0.4
±60
±85
V
mA
mA
2883fd
4
For more information
www.linear.com/LTM2883
LTM2883
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
I
2
C
V
IL
V
IH
I
INL
V
HYS
V
OH
V
OL
Low Level Input Voltage
High Level Input Voltage
Input Current
Input Hysteresis
Output High Voltage
Output Low Voltage
SCL, SDA
SDA2
SCL, SDA
SDA2
SCL, SDA = V
L
or 0V
SCL, SDA
SDA2
SCL2, I
LOAD
= –2mA
DO2, I
LOAD
= –2mA
SDA, V
L
= 3V, I
LOAD
= 3mA
DO2, V
L
= 3V, 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
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2883-3 V
CC
= 3.3V, LTM2883-5 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
0.3 • V
L
0.3 • V
CC2
0.7 • V
L
0.7 • V
CC2
±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
UNITS
V
V
V
V
µA
mV
mV
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
SWITCHING CHARACTERISTICS
SYMBOL PARAMETER
Logic
Maximum Data Rate
t
PHL
, t
PLH
Propagation Delay
t
R
t
F
SPI
Maximum Data Rate
t
PHL
, t
PLH
Propagation Delay
t
PWU
Output Pulse Width Uncertainty
Rise Time
Fall Time
CONDITIONS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. LTM2883-3 V
CC
= 3.3V, LTM2883-5 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.
MIN
l
l
l
l
l
l
TYP
MAX
UNITS
MHz
Ix
→
DOx, C
L
= 15pF (Note 3)
C
L
= 15pF (Figure 1)
C
L
= 15pF (Figure 1)
LTM2883-I, DO2, C
L
= 15pF (Figure 1)
C
L
= 15pF (Figure 1)
LTM2883-I, DO2, C
L
= 15pF (Figure 1)
Bidirectional Communication (Note 3)
Unidirectional Communication (Note 3)
C
L
= 15pF (Figure 1)
SDI2,
CS2
(Note 2)
10
35
60
3
20
3
20
4
8
35
–20
60
100
50
100
12.5
35
12.5
35
ns
ns
ns
ns
ns
MHz
MHz
ns
ns
l
l
l
2883fd
For more information
www.linear.com/LTM2883
5
嵌入式系统
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