描述 Description

The ISOW14x2 devices are galvanically-isolated RS-485/RS-422 transceiver s 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.

特性 Features

? Meets or exceeds the requirements of the TIA/ EIA-485A standard
? Data rates
? 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
? 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

? Section 8.6:
? VDE reinforced and basic insulation per DIN VDE V 0884-11:2017-01
? UL 1577 component recognition program
? IEC 62368-1, IEC 61010-1, IEC 60601-1 and GB 4943.1-2011 certifications