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LTC2876 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2876 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 32 page  LTC2876/LTC2877 1 28767fa For more information www.linear.com/LTC2876 Typical applicaTion FeaTures DescripTion ±60V Rugged PROFIBUS RS485 Transceivers The LTC®2876 and LTC2877 are PROFIBUS RS485 transceivers designed to meet the test specifications for PROFIBUS-DP masters and PROFIBUS-DP slaves, fully compatible with IEC 61158-2, type 3: medium attachment unit (MAU). With operation up to 20Mbps, the LTC2876/ LTC2877 supports all PROFIBUS data rates up to 12Mbps. The LTC2876 and LTC2877 are exceptionally robust, toler- ating ±60V faults on the bus pins and protected to ±52kV ESD. These devices are suitable for harsh environments or where 24V power might be inadvertently connected. Extended ±25V input common mode range and full fail- safe operation improve data communication reliability in noisy systems. The LTC2876 and LTC2877 meet PROFIBUS and RS485 specifications with a supply voltage of 4.5V to 5.5V but can operate down to 3V with reduced supply current. Product Selection Guide PART NUMBER LOGIC SUPPLY PIN PACKAGE LTC2876 NO DFN-8, MSOP-8 LTC2877 YES DFN-10, MSOP-10 applicaTions n PROFIBUS IEC 61158-2 Compliant n Protected from Overvoltage Line Faults to ±60V n ±52kV ESD Interface Pins, ±15kV All Other Pins n ±2kV (Level 4) IEC61000-4-4 Fast Transient Burst n ±25V Working Common Mode Range n 20Mbps Maximum Baud Rate n 1.65V to 5.5V Logic Supply Pin for Flexible Digital Interfacing (LTC2877) n 5V Supply Can Operate Down to 3V for Low Power, Low Swing Applications n Fully Balanced Differential Receiver Thresholds with 240mV Hysteresis for Superior Noise Tolerance and Low Duty Cycle Distortion n Receiver Failsafe for Open, Shorted and Terminated Conditions n Wide Operating Temperature Range: –40°C to 125°C n Available in Small DFN and MSOP Packages n PROFIBUS-DP n Industrial Communication Networks n RS485 and RS422 Systems n 3V Low Voltage Differential Signaling L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 1.8V VCC VL GND DI RE RO DE PA PB 0.1µF LTC2877 SENSOR 390 PB PA 390 220 5V 5V PROFIBUS CABLE ZO = 150Ω µC 1µF 390 390 220 B´ A´ 28767 TA01a Eye Diagram of 12Mbps Signal at the Near and Far End of a 100m PROFIBUS Cable Driven by the LTC2877 Using 28–1 PRBS Pattern 20ns/DIV PB–PA 2V/DIV B´– A´ 2V/DIV 28767 TA01b NEAR END FAR END |
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Similar Description - LTC2876 |
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