Analog Devices DC1747A-B
LTM2882 µModule® Transceiver, RS-232 Interface Evaluation Board
DESCRIPTION
Dual Isolated RS232
µModule Transceiver + Power
The LTM®2882 is a complete galvanically isolated dual
RS232 µModule® (micromodule)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 ofisolationbetweenthe 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 controlling 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
FEATURES
- RS232 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
- 1.62V to 5.5V Logic Supply for Flexible Digital
Interfacing
- High Speed Operation
1Mbps for 250pF/3kΩ Load
250kbps for 1nF/3kΩ Load
100kbps for 2.5nF/3kΩ TIA/EIA-232-F Load
- 3.3V (LTM2882-3) or 5V (LTM2882-5) Operation
- No Damage or Latchup to ±10kV HBM ESD on
Isolated RS232 Interface or Across Isolation Barrier
- High Common Mode Transient Immunity: 30kV/μs
- Maximum Continuous Working Voltage: 560VPEAK
- True RS232 Compliant Output Levels
- 15mm × 11.25mm BGA and LGA Packages