LTM2882_15 Datasheet, PDF (1/22 Pages) Linear Technology – Dual Isolated RS232 Module Transceiver Power

LTM2882
Dual Isolated RS232
µModule Transceiver + Power
Features
Description
n _{RS232 Transceiver: 2500VRMS for 1 Minute}
UL Recognized File #E15178
®
n _{Isolated DC Power: 5V at Up to 200mA}
n _{No External Components Required}
n _{1.62V to 5.5V Logic Supply for Flexible Digital}
Interfacing
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 HBM ESD on}
Isolated RS232 Interface or Across Isolation Barrier
n _{High Common Mode Transient Immunity: 30kV/μs}
n _{Maximum Continuous Working Voltage: 560VPEAK}
n _{True RS232 Compliant Output Levels}
n _{Low Profile (15mm × 11.25mm) Surface Mount}
BGA and LGA Packages
Applications
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 2500V_RMS 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.
n _{Isolated RS232 Interface}
n _{Industrial Communication}
n _{Test and Measurement Equipment}
n _{Breaking RS232 Ground Loops}
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.
Typical Application
Isolated Dual RS232 µModule Transceiver
1Mbps Operation
3.3V (LTM2882-3)
5V (LTM2882-5)
OFF ON
V_L V_CC
ON
DIN
T1IN
R1OUT
LTM2882
V_CC2
DE
DOUT
T1OUT
R1IN
5V
AVAILABLE CURRENT:
150mA (LTM2882-5)
100mA (LTM2882-3)
5V/DIV
10V/DIV
5V/DIV
TIN
T1OUT/R1IN
T2OUT/R2IN
R1OUT
R2OUT
T2IN
R2OUT
GND
GND2
T2OUT
R2IN
2882 TA01a
400ns/DIV
2882 TA01b
DRIVER OUTPUTS TIED TO RECEIVER INPUTS
TOUT LOAD = 250pF + RIN
ROUT LOAD = 150pF
2882ff
For more information www.linear.com/LTM2882
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