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.
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.
n
n
n
n
n
n
n
n
n
n
n
UL Rated 6-Channel Logic Isolator: 2500V
RMS
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
Common Mode 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
Industrial Systems
Test and Measurement Equipment
Breaking Ground Loops
applicaTions
n
n
n
n
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
2883fa
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 .................. –55°C to 150°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
2883fa
2
LTM2883
orDer inForMaTion
LTM2883 C
Y
-3
S
#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 105°C)
PRODUCT PART NUMBER
proDucT selecTion guiDe
PART NUMBER
LTM2883-3I
LTM2883-3S
LTM2883-5I
LTM2883-5S
PART MARKING*
LTM2883Y-3I
LTM2883Y-3S
LTM2883Y-5I
LTM2883Y-5S
PACKAGE
BGA
BGA
BGA
BGA
INPUT VOLTAGE
3V to 3.6V
3V to 3.6V
4.5V to 5.5V
4.5V to 5.5V
LOGIC OPTION
Inter-IC Bus (I
2
C)
Serial Peripheral Interface Bus (SPI)
Inter-IC Bus (I
2
C)
Serial Peripheral Interface Bus (SPI)
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
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
2883fa
Logic Supply Current
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
l
l
0.25 • V
L
l
0.33 • V
L
l
0.33 • V
CC2
l
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
I
LOAD
= 100µA to 15mA, H-Grade
I
LOAD
= 100µA to 15mA
I
LOAD
= 15mA (Note 2)
I
LOAD
= 15mA (Note 2)
V
–
= 0V
ΔV
–
= 0.5V, V
+
= 1.5mA
l
l
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
l
l
20
–12
–12.5
4
35
–1.184
–1.220
2
45
30
–13
15
35
150
–1.256
V
mV
mV
mV
mV
mV
RMS
%
mA
mA
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
2883fa
4
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)
l
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. 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.
“tensymetry”这个词在《韦伯斯特词典》中没有解释，但在医学界却广为人知。由Tensys Medical Systems公司开发的tensymetry是一种使用生物机械、电气、软件工程的专有组合技术。利用这三种强大的技术，你可在手术室内对病人的心跳血压进行精确、连续、实时和非侵入性测量。 该技术结出的果实就是该公司的T-line Tensymeter产品。该产品线的最新进展是去年...[详细]
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