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LTM2881: Complete Isolated RS485/RS422 μModule Transceiver + Power Data Sheet11/23/2016PDF580K
Alternative Parts
Overview
Features and Benefits
- RS485/RS422 Transceiver: 2500VRMS 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: 560VPEAK
- 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
Product Details
The LTM2881 is a complete galvanically isolated full-duplex 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 2500VRMS 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 common mode voltage variation. Uninterrupted communication 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.
Applications
- Isolated RS485/RS422 Interface
- Industrial Networks
- Breaking RS485 Ground Loops
- Isolated PROFIBUS-DP Networks
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (4)
Documentation & Resources
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R596 Reliability Data3/26/2018PDF22 K
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AN125 - Using the LTM2881 as an Isolated 5V Power Supply2/5/2010PDF92K
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DC1746A - Demo Manual12/23/2010PDF469K
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DC1503A - Demo Manual6/2/2010PDF531K
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Digital Isolator Product Selection Guide10/3/2017PDF1M
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μModule Isolators7/13/2017PDF5M
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RS485 Quick Guide7/13/2017PDF524K
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Ultra Rugged ±60V RS485 Transceivers3/15/2013PDF282K
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LTM2881 - Isolated RS485 + 1W Power2/1/2011PDF0M
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Digital Isolation and Interface Technology Selection Guide2/7/2020PDF4 M
Tools & Simulations
IBIS Models
IBS
LTM2881 IBIS Model
291.00K
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
Support & Discussions
LTM2881 Discussions
RE: LTM2881
1 week(s) ago in Interface and Isolation
RE: Gates Number or FIT data for LTM2881IY-3#PB
22 week(s) ago in Interface and Isolation
RE: LTM2881 DOUT pin
24 week(s) ago in Interface and Isolation
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.