ایزولاتور ایزولاتور دیجیتال

Product Attributes

Introduction

The Si838x provides eight input channels ideal for 24 V digital logic commonly used for industrial applications. These channels can either sink or source current and feature integrated safety rated isolation. In combination with a few external components, this provides compliance to IEC 61131-2 switch types 1, 2, or 3. The input interface is based on Skyworks' ground-breaking CMOS based LED emulator technology which enables the bipolar capability (sinking or sourcing inputs) with no VDD required on the field side. The output interface from the Si838x device allows for low power operation with 2.25 V compliance. These products utilize Skyworks' proprietary CMOS-based isolation technology, supporting up to 2.5 kVRMS withstand voltage. This technology enables high CMTI (up to 300 kV/μs), lower propagation delays and channel skew, reduced variation with temperature and age, and tighter part-to-part matching. The Si838x offers longer service life and dramatically higher reliability compared to opto-coupled input solutions. Product options include parallel or serialized outputs. Parallel outputs can be purchased with built-in, low-pass filters for improved noise immunity, reduced design complexity and cost. Cascading a total of 128 channels (16xSi838x) with a single MCU interface is possible with the Si8380S serial output option. The Si8380S also unlocks the ability to configure each channel with unique filtering behavior.

Features

• Bipolar digital interface with 24 V sinking or sourcing inputs
• Eight total inputs in one package
• High data rates of up to 2 Mbps
• Safety rated integrated isolation of 2.5 kVRMS
• Low input current of 1 mA typ
• No VDD required on field side
• High electromagnetic immunity
• Selectable debounce filter times of up to 100 ms
• Configurable debounce filter modes available with SPI interface option
• Transient immunity up to 300 kV/μs
• Flow-through output configuration with eight outputs
• Option for SPI interface with daisy-chain capability
• Wide 2.25 to 5.5 V VDD operation
• Wide operating temperature range: -40 to +125 ℃
• Compliant to IEC 61131-2: Type 1, 2, 3
• RoHS-compliant packages: QSOP-20

Applications

• Programmable logic controllers
• Industrial data acquisition
• Distributed control systems
• CNC machines
• I/O modules
• Motion control systems