Interface RS485/RS422 Transceivers
Interface Isolated Transceivers
 µModule Solutions µModule Isolated Transceivers

LTM2881 - Complete Isolated RS485/RS422 μModule Transceiver + Power

LTC1535 - Isolated RS485 Transceiver

LTM2885 - 6500VRMS Isolated RS485/RS422 μModule Transceiver + Power

Features

  • RS485/RS422 Transceiver: 6500VRMS for 1 Minute
  • Reinforced Insulation
  • Isolated DC Power: 5V at 150mA
  • No External Components Required
  • 20Mbps or Low EMI 250kbps Data Rate
  • High ESD: ±15kV HBM on Transceiver Interface
  • High Common Mode Transient Immunity: 50kV/μs
  • Integrated Selectable 120Ω Termination
  • Extended Creepage and Clearance ~14.6mm
  • 1.62V to 5.5V Logic Supply Pin for Flexible Digital Interface
  • Maximum Continuous Working Voltage: 690VRMS
  • 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
  • 22mm × 9mm × 5.16mm Surface Mount BGA Package

Typical Application

LTM2885 Typical Application
LTM2885 Typical Application

Description

The LTM®2885 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 6500VRMS 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 up to 50kV/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 ±25kV through the isolation barrier to logic supplies without latch-up or damage.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTM2885CY#PBF 22mm x 9mm x 5.16mm BGA BGA C 05-08-1960 Yes
LTM2885HY#PBF 22mm x 9mm x 5.16mm BGA BGA H 05-08-1960 Yes
LTM2885IY#PBF 22mm x 9mm x 5.16mm BGA BGA I 05-08-1960 Yes


LTM2885 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTM2885CY#PBF 22mm x 9mm x 5.16mm BGA C $17.11 $11.98 Yes
LTM2885HY#PBF 22mm x 9mm x 5.16mm BGA H $24.23 $16.96 Yes
LTM2885IY#PBF 22mm x 9mm x 5.16mm BGA I $20.19 $14.14 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1794A LTM2885 Demo Board | 6.5kV Isolated RS485/RS422 μModule Transceiver + Power $75.00
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Click here to view our complete list of demo boards

Applications

  • Isolated RS485/RS422 Interface
  • Industrial Networks
  • Breaking RS485 Ground Loops
  • Isolated PROFIBUS-DP Networks

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