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ISOW1412

更新时间: 2024-11-19 02:50:11
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德州仪器 - TI /
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描述
ISOW14x2 Isolated RS-485/RS-422 Transceiver with Integrated Low-Emissions, Low-Noise, High-Efficiency DC-DC Converter

ISOW1412 数据手册

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ISOW1412, ISOW1432  
SLLSF86B – MAY 2018 – REVISED OCTOBER 2021  
ISOW14x2 Isolated RS-485/RS-422 Transceiver with Integrated Low-Emissions, Low-  
Noise, High-Efficiency DC-DC Converter  
– UL 1577 component recognition program  
– IEC 62368-1, IEC 61010-1, IEC 60601-1 and  
1 Features  
Meets or exceeds the requirements of the TIA/  
EIA-485A standard  
Data rates  
GB 4943.1-2011 certifications  
2 Applications  
Factory automation  
Building automation  
Industrial transport  
Solar inverters, protection relay  
Motor drives  
– ISOW1412 : 500 kbps  
– ISOW1432 : 12 Mbps  
Integrated low-emissions DC-DC converter with  
low-emissions, low-noise  
– Meets CISPR 32 Class B and EN 55032 Class  
B with margin on a two-layer PCB  
– Low frequency power converter at 25 MHz  
enabling low noise performance  
Additional 2 Mbps GPIO channel  
High efficiency output power  
3 Description  
The ISOW14x2 devices are galvanically-isolated  
RS-485/RS-422 transceivers with a built-in isolated  
DC-DC converter, that eliminates the need for a  
separate isolated power supply in space constrained  
isolated designs. The low-emissions, isolated DC-  
DC converter meets CISPR 32 radiated emissions  
Class B standard with just two ferrite beads on  
a simple two-layer PCB. Additional 20 mA output  
current can be used to power other circuits on the  
board. An integrated 2 Mbps GPIO channel helps  
remove any additional digital isolator or optocoupler  
for diagnotstics, LED indication or supply monitoring.  
– Typical efficiency: 46%  
– VISOOUT accuracy: ±5%  
– Additional output current: 20 mA  
Independent power supply for RS-485 & DC-DC  
– Logic supply (VIO): 1.71 V to 5.5 V  
– Power converter supply ( VDD): 3 V to 5.5 V  
RS-485 with PROFIBUS compatibility  
– Open, short, and idle bus failsafe  
– 1/8 unit load: up to 256 nodes on bus  
– Glitch-free power up and power down  
Reinforced and Basic isolation options  
High CMTI: 100-kV/µs (typical)  
High ESD bus protection  
– HBM: ±16 kV  
– IEC 61000-4-2 contact discharge: ±8 kV  
Operating temperature range: -40°C to 125°C  
Current limit and thermal shutdown  
20-pin wide SOIC package  
Device Information  
ISOW1412  
ISOW1432  
ISOW1412B  
ISOW1432B  
FEATURE  
Protection Level  
Surge Test Voltage  
Isolation Rating  
Working Voltage  
Package(1)  
Reinforced  
10 kVPK  
Basic  
7.8 kVPK  
5000 VRMS  
5000 VRMS  
1000 VRMS/1500VPK 1000 VRMS/1500VPK  
DFM (20)  
DFM (20)  
Body Size  
12.83mm x 7.5mm  
12.83mm x 7.5mm  
Section 8.6:  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
– VDE reinforced and basic insulation per DIN  
VDE V 0884-11:2017-01  
VCC  
VIO  
VISOIN  
Must be connected on PCB,  
not connected internally  
DE  
Y
D
Signal  
R
Signal  
Isolation  
Z
RS485  
RS485 Bus  
B
MCU  
Isolation  
RE  
A
GISOIN  
GNDIO  
VISOOUT  
GND2  
DC-DC  
Primary  
DC-DC  
Secondary  
VDD  
GND1  
Galvanic Isolation  
Barrier  
Simplified Schematic  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION  
DATA.  
 
 
 
 
 

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