Isolator   μ Module®   Transceivers <ul><li>Source: LINEAR TECHNOLOGY </li></ul>
Introduction <ul><li>Purpose </li></ul><ul><ul><li>To introduce the Isolator µModule ®  technology and the LTM2881 Isolate...
Isolator µModule ®  Technology (11.25mm x 15mm x 2.8mm) RS485 Transceiver Coupled Signal Inductors Decoupling Caps Isolato...
LTM2881: Complete Isolated RS485/RS422 µModule Transceiver + 1W Power <ul><li>FEATURES: </li></ul><ul><li>Isolated   RS485...
<ul><li>APPLICATION: </li></ul><ul><ul><li>Rugged Communication </li></ul></ul><ul><ul><li>High level of functional integr...
LTM2881: Block Diagram
35kV/  s Common  Mode Transient Immunity DI-> (Y=A, Z=B) ->RO, no jitter or corruption during CM transients
V CC2  Output Current vs Temp with RS485 Disabled (TE=DE=0) or Enabled (60mA mode)
LTM2881: Applications <ul><li>Isolated RS485/RS422 interface </li></ul><ul><li>Industrial Networks </li></ul><ul><li>Break...
LTM2881 as an Isolated Power Supply
<ul><li>Highest   Level   of   Functional   Integration.   </li></ul><ul><ul><li>No   External   Components </li></ul></ul...
Additional Resource <ul><li>For ordering the LTM2881, please click the part list or </li></ul><ul><li>Call our sales hotli...
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Isolator µModule® Transceivers

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To introduce the Isolator µModule® technology and the LTM2881 Isolated RS485/RS422 μModule ® Transceiver

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Isolator µModule® Transceivers

  1. 1. Isolator μ Module® Transceivers <ul><li>Source: LINEAR TECHNOLOGY </li></ul>
  2. 2. Introduction <ul><li>Purpose </li></ul><ul><ul><li>To introduce the Isolator µModule ® technology and the LTM2881 Isolated RS485/RS422 μModule ® Transceiver. </li></ul></ul><ul><li>Outline </li></ul><ul><ul><li>An overview of Isolator µModule ® technology </li></ul></ul><ul><ul><li>The LTM2881 introduction </li></ul></ul><ul><ul><li>Block diagram </li></ul></ul><ul><ul><li>Key features of the LTM2881 </li></ul></ul><ul><li>Content </li></ul><ul><ul><li>12 pages </li></ul></ul>
  3. 3. Isolator µModule ® Technology (11.25mm x 15mm x 2.8mm) RS485 Transceiver Coupled Signal Inductors Decoupling Caps Isolators Transformer LDO Diodes
  4. 4. LTM2881: Complete Isolated RS485/RS422 µModule Transceiver + 1W Power <ul><li>FEATURES: </li></ul><ul><li>Isolated RS485/RS422 transceiver: 2500V RMS </li></ul><ul><li>Integrated Isolated DC/DC converter </li></ul><ul><li>No external components required </li></ul><ul><li>High common mode transient immunity: 30KV/ µ s </li></ul><ul><li>20Mbps or low EMI 250kbps data rate </li></ul><ul><li>Integrated selectable 120 Ω termination </li></ul><ul><li>1.62V to 5.5V logic supply pin for flexible digital interface </li></ul><ul><li>High input impedance RS485 receiver supports up to 256 nodes </li></ul><ul><li>High ESD: ± 15KV HBM on transceiver interface </li></ul><ul><li>Zero power shutdown mode (5 µA Max), RS485 remains Hi-Z </li></ul><ul><li>Current limited drivers, failsafe receiver and thermal protection </li></ul>
  5. 5. <ul><li>APPLICATION: </li></ul><ul><ul><li>Rugged Communication </li></ul></ul><ul><ul><li>High level of functional integration – No external components! </li></ul></ul><ul><li>POWER: </li></ul><ul><ul><li>Good Efficiency (62%) </li></ul></ul><ul><ul><li>Surplus Power for the application (up to 1W) </li></ul></ul><ul><li>ISOLATION: </li></ul><ul><ul><li>Protection from dangerous voltages (>2500V RMS ) </li></ul></ul><ul><ul><li>Uninterrupted, Error-Free Communication </li></ul></ul><ul><ul><li>Certifications Pending: UL, CSA, IEC </li></ul></ul><ul><ul><li>EMC Ratings Pending: Emissions & Immunity </li></ul></ul><ul><li>COMMUNICATION: </li></ul><ul><ul><li>Differential signaling and encoding yield superior signal integrity </li></ul></ul><ul><ul><li>Prioritized, event driven, data encoding produces jitter free signals </li></ul></ul><ul><ul><li>High data rate (20Mbps) </li></ul></ul><ul><ul><li>Superior common mode transient immunity (>30kV/µs) </li></ul></ul>TLM2881 Features & Benefits
  6. 6. LTM2881: Block Diagram
  7. 7. 35kV/  s Common Mode Transient Immunity DI-> (Y=A, Z=B) ->RO, no jitter or corruption during CM transients
  8. 8. V CC2 Output Current vs Temp with RS485 Disabled (TE=DE=0) or Enabled (60mA mode)
  9. 9. LTM2881: Applications <ul><li>Isolated RS485/RS422 interface </li></ul><ul><li>Industrial Networks </li></ul><ul><li>Breaking RS485 Ground Loops </li></ul>E-Meter Slave node E-Meter Slave node E-Meter Slave node E-Meter Slave node Central Data Collection Master node
  10. 10. LTM2881 as an Isolated Power Supply
  11. 11. <ul><li>Highest Level of Functional Integration. </li></ul><ul><ul><li>No External Components </li></ul></ul><ul><ul><li>Selectable 120 Ω Termination </li></ul></ul><ul><ul><li>General Purpose Isolated Logic Channel </li></ul></ul><ul><li>Highest available power up to 1 Watt </li></ul><ul><ul><li>Regulated with Low Ripple </li></ul></ul><ul><ul><li>Cored Power Transformer </li></ul></ul><ul><ul><ul><li>Ferrite Core Contains the Magnetic Flux </li></ul></ul></ul><ul><ul><ul><li>Allows Lower Switching Frequency (1.6MHz) </li></ul></ul></ul><ul><ul><ul><li>Both reduce radiated emissions </li></ul></ul></ul><ul><ul><li>Good Efficiency (up to 62%) </li></ul></ul><ul><ul><li>Surplus Power for the End Application, not just the internal Application! </li></ul></ul><ul><li>Superior Common Mode Transient Immunity </li></ul><ul><ul><li>>30kV/µs </li></ul></ul><ul><ul><li>Communicate through the event, with no Jitter! </li></ul></ul><ul><li>Can Integrate ANY Application with this isolation! </li></ul>LTM2881CV Evaluation Kit Summary
  12. 12. Additional Resource <ul><li>For ordering the LTM2881, please click the part list or </li></ul><ul><li>Call our sales hotline </li></ul><ul><li>For more product information go to </li></ul><ul><ul><li>http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1007,C1017,P89603#descriptionSection </li></ul></ul><ul><li>Visit Element 14 to post your question </li></ul><ul><ul><li> www.element-14.com </li></ul></ul><ul><li>For additional inquires contact our technical service hotline or even use our “Live Technical Chat” online facility </li></ul>

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