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LTM2882

更新时间： 2024-01-22 08:13:10
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
18页 286K
描述
Dual Isolated RS232 μModule Transceiver + Power

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中文翻译

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LTM2882 数据手册

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LTM2882  
Dual Isolated RS232  
µModule Transceiver + Power  
FEATURES  
DESCRIPTION  
The LTM®2882 is a complete galvanically isolated dual  
RS232μModule®transceiver. Noexternalcomponentsare  
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.  
n
Isolated Dual RS232 Transceiver: 2500V  
RMS  
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  
Interface  
n
High Speed Operation  
1Mbps for 250pF/3kΩ Load  
250kbps for 1nF/3kΩ Load  
Coupled inductors and an isolation power transformer  
100kbps for 2.5nF/3kΩ TIA/EIA-232-F Load  
3.3V ꢁLTM2882-3ꢂ or 5V ꢁLTM2882-5ꢂ Operation  
No Damage or Latchup to 10kV ESD ꢃHM on  
Isolated RS232 Interface or Across Isolation Harrier  
ꢃigh Common Mode Transient Immunity: 30kV/ꢀs  
Common Mode Working Voltage: 560V  
True RS232 Compliant Output Levels  
provide2500V  
ofisolationbetweenthelinetransceiver  
RMS  
n
n
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/ꢀs.  
n
n
n
n
PEAK  
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.  
Small Low Profile ꢁ15mm × 11.25mm × 2.8mmꢂ  
Surface Mount HGA and LGA Packages  
APPLICATIONS  
n
Isolated RS232 Interface  
n
Industrial Communication  
Enhanced ESD protection allows this part to withstand up  
to 10kVꢁhumanbodymodelꢂonthetransceiverinterface  
pins to isolated supplies and across the isolation barrier  
to logic supplies without latchup or damage.  
n
Test and Measurement Equipment  
Hreaking RS232 Ground Loops  
n
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 ꢁLTM2882-3ꢂ  
5V ꢁLTM2882-5ꢂ  
TIN  
5V/DIV  
V
V
CC  
LTM2882  
L
V
5V  
CC2  
DE  
AVAILAHLE CURRENT:  
150mA ꢁLTM2882-5ꢂ  
100mA ꢁLTM2882-3ꢂ  
OFF ON  
ON  
T1OUT/R1IN  
10V/DIV  
DIN  
DOUT  
T1OUT  
R1IN  
T2OUT/R2IN  
T1IN  
R1OUT  
5V/DIV  
R2OUT  
R1OUT  
T2IN  
T2OUT  
R2IN  
2882 TA01b  
400ns/DIV  
R2OUT  
DRIVER OUTPUTS TIED TO RECEIVER INPUTS  
TOUT LOAD = 250pF + RIN  
ROUT LOAD = 150pF  
GND  
GND2  
2882 TA01a  
2882fa  
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