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LTM2882 Datasheet(PDF) 1 Page - Linear Technology |
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LTM2882 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 16 page  Electrical Specifications Subject to Change LTM2882 1 2882p TYPICAL APPLICATION DESCRIPTION Dual Isolated RS232 µModule Transceiver + Power The LTM®2882 is a complete galvanically isolated dual RS232 μModule®transceiver. No external components are required. A single 3.3V or 5V supply powers both sides of the interface through an integrated, isolated DC/DC converter. A logic supply pin allows easy interfacing with different logic levels from 1.62V to 5.5V, independent of the main supply. 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 with different grounds, allowing for large common mode voltages. Uninterrupted communication is guaranteed for common mode transients greater than 30kV/μs. This part is compatible with the TIA/EIA-232-F standard. Driver outputs are protected from overload and can be shorted to ground or up to ±15V without damage. An auxiliary isolated digital channel is available. This channel allows configuration for half-duplex operation by control- ling the DE pin. Enhanced ESD protection allows this part to withstand up to ±10kV (human body model) on the transceiver interface pins to isolated supplies and across the isolation barrier to logic supplies without latchup 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. Isolated Dual RS232 μModule Transceiver FEATURES APPLICATIONS n Isolator μModule Technology n Isolated Dual RS232 Transceiver: 2500VRMS n Integrated Isolated DC/DC Converter: 1W, 65% Efficiency n No External Components Required n 1.62V to 5.5V Logic Supply for Flexible Digital Interface n High Speed Operation 1Mbps for 250pF/3kΩ Load 250kbps for 1nF/3kΩ Load 100kbps for 2.5nF/3kΩ TIA/EIA-232-F Load n 3.3V (LTM2882-3) or 5V (LTM2882-5) Operation n No Damage or Latchup to ±10kV ESD HBM on Isolated RS232 Interface or Across Isolation Barrier n High Common Mode Transient Immunity: 30kV/μs n Common Mode Working Voltage: 560VPEAK n True RS232 Compliant Output Levels n Small Low Profile (15mm × 11.25mm × 2.8mm) Surface Mount LGA Package n Isolated RS232 Interface n Industrial Communication n Test and Measurement Equipment n Breaking RS232 Ground Loops 1Mbps Operation 2882 TA01a ON DIN T1IN R1OUT T2IN R2OUT DOUT T1OUT R1IN T2OUT R2IN LTM2882 3.3V (LTM2882-3) 5V (LTM2882-5) VL VCC GND GND2 ON OFF VCC2 DE 5V AVAILABLE CURRENT: 150mA (LTM2882-5) 100mA (LTM2882-3) 400ns/DIV DRIVER OUTPUTS TIED TO RECEIVER INPUTS TOUT LOAD = 250pF + RIN ROUT LOAD = 150pF 10V/DIV 5V/DIV TIN T1OUT/R1IN T2OUT/R2IN 5V/DIV 2882 TA01b R1OUT R2OUT |
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