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LTM2881CV-3#PBF

Description
DGTL ISO 2.5KV RS422/RS485 32LGA
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size570KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTM2881CV-3#PBF Overview

DGTL ISO 2.5KV RS422/RS485 32LGA

LTM2881CV-3#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
Parts packaging codeLGA
package instruction15 X 11.25 MM, 2.80 MM HEIGHT, LEAD FREE, MO-222, LGA-32
Contacts32
Manufacturer packaging codeLGA
Reach Compliance Codecompliant
ECCN codeEAR99
Differential outputYES
Number of drives1
Input propertiesDIFFERENTIAL SCHMITT TRIGGER
Interface integrated circuit typeLINE TRANSCEIVER
Interface standardsEIA-485-A; TIA-485-A; EIA-422
JESD-30 codeR-PBGA-N32
JESD-609 codee4
length15 mm
Humidity sensitivity level3
Number of functions1
Number of terminals32
Maximum operating temperature70 °C
Minimum operating temperature
Minimum output swing1.5 V
Maximum output low current0.004 A
Package body materialPLASTIC/EPOXY
encapsulated codeLGA
Encapsulate equivalent codeLGA32,8X11,50
Package shapeRECTANGULAR
Package formGRID ARRAY
Peak Reflow Temperature (Celsius)245
power supply3.3 V
Certification statusNot Qualified
Maximum receive delay140 ns
Number of receiver bits1
Maximum seat height2.95 mm
Maximum slew rate25 mA
Maximum supply voltage5.5 V
Minimum supply voltage1.62 V
Nominal supply voltage3.3 V
Supply voltage 1-max3.6 V
Mains voltage 1-minute3 V
Supply voltage1-Nom3.3 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceGold (Au)
Terminal formNO LEAD
Terminal pitch1.27 mm
Terminal locationBOTTOM
Maximum time at peak reflow temperature30
maximum transmission delay85 ns
width11.25 mm
Base Number Matches1
FeaTures
n
n
n
n
n
n
n
n
n
n
n
n
n
n
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n
n
LTM2881
Complete Isolated
RS485/RS422 µModule
Transceiver + Power
DescripTion
The
LTM
®
2881
is a complete galvanically isolated full-du-
plex RS485/RS422 µModule
®
(micromodule) transceiver.
No external components are required. A single supply
powers both sides of the interface through an integrated,
isolated, low noise, efficient 5V output DC/DC converter.
Coupled inductors and an isolation power transformer
provide 2500V
RMS
of isolation between the line transceiver
and the logic interface. This device is ideal for systems
where the ground loop is broken allowing for large com-
mon mode voltage variation. Uninterrupted communica-
tion is guaranteed for common mode transients greater
than 30kV/μs.
Maximum data rates are 20Mbps or 250kbps in slew
limited mode. Transmit data, DI and receive data, RO, are
implemented with event driven low jitter processing. The
receiver has a one-eighth unit load supporting up to 256
nodes per bus. A logic supply pin allows easy interfacing
with different logic levels from 1.62V to 5.5V, independent
of the main supply.
Enhanced ESD protection allows this part to withstand up
to ±15kV (human body model) on the transceiver interface
pins to isolated supplies and ±10kV through the isolation
barrier to logic supplies without latch-up or damage.
L,
LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
RS485/RS422 Transceiver: 2500V
RMS
for 1 Minute
UL-CSA Recognized
File #E151738
CSA Component Acceptance Notice 5A
Isolated DC Power: 5V at Up to 200mA
No External Components Required
20Mbps or Low EMI 250kbps Data Rate
High ESD: ±15kV HBM on Transceiver Interface
High Common Mode Transient Immunity: 30kV/μs
Integrated Selectable 120Ω Termination
3.3V (LTM2881-3) or 5.0V (LTM2881-5) Operation
1.62V to 5.5V Logic Supply Pin for Flexible Digital Interface
Maximum Continuous Working Voltage: 560V
PEAK
High Input Impedance Failsafe RS485 Receiver
Current Limited Drivers and Thermal Shutdown
Compatible with TIA/EIA-485-A and PROFIBUS
High Impedance Output During Internal Fault Condition
Low Current Shutdown Mode (< 10µA)
General Purpose CMOS Isolated Channel
15mm
×
11.25mm BGA and LGA Packages
applicaTions
n
n
n
n
Isolated RS485/RS422 Interface
Industrial Networks
Breaking RS485 Ground Loops
Isolated PROFIBUS-DP Networks
Typical applicaTion
Isolated Half-Duplex RS485 μModule Transceiver
3.3V (LTM2881-3)
5V (LTM2881-5)
V
CC
ISOLATION BARRIER
V
L
RO
RE
TE
DE
DI
GND
LTM2881
AVAILABLE CURRENT:
150mA (LTM2881-5)
100mA (LTM2881-3)
LTM2881 Operating Through 35kV/μs CM Transients
MULTIPLE SWEEPS
OF COMMON MODE
TRANSIENTS
PWR
V
CC2
A
B
5V
500V/DIV
DI
TWISTED-PAIR
CABLE
1V/DIV
1V/DIV
50ns/DIV
2881 TA01a
RO
Y
Z
GND2
2881 TA01
For more information
www.linear.com/LTM2881
1
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