ایزولاتور ایزولاتور دیجیتال

Product Attributes

Introduction

The ADM2682E/ADM2687E are fully integrated 5 kV rms signal and power isolation data transceivers with ±15 kV ESD protection, suitable for high-speed communication applications on multipoint transmission lines. An integrated 5 kV rms isolated DC/DC power supply eliminates the need for an external DC/DC isolation module. The devices are designed for balanced transmission lines and comply with the ANS/TIA/EIA-485-A-98 and ISO 8482:1987(E) standards. These devices integrate iCoupler technology, combining a 3-channel isolator, a three-state differential line driver, a differential input receiver, and an isoPower DC/DC converter in a single package. Operating from a 5 V or 3.3 V single supply, they provide a fully integrated signal and power isolation RS-485 solution. The ADM2682E/ADM2687E feature active high driver enable and active low receiver enable, with the receiver output entering a high-impedance state when disabled. These devices incorporate current limiting and thermal shutdown protection to prevent excessive power dissipation due to output short circuits and bus contention. Rated for the industrial temperature range, they are available in a 16-lead wide-body SOIC high-integration package with creepage and clearance distances greater than 8 mm. The ADM2682E/ADM2687E use isoPower technology to transfer power through a transformer using high-frequency switching elements.

Features

• 5 kV rms isolated RS-485/RS-422 transceiver, configurable for half-duplex or full-duplex operation
• Integrated isoPower isolated DC/DC converter
• ±15 kV ESD protection on RS-485 input/output pins
• Compliant with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E)
• Data rate: 16 Mbps (ADM2682E), 500 kbps (ADM2687E)
• 5 V or 3.3 V supply voltage
• Bus supports up to 256 nodes
• Open-circuit and short-circuit fault protection receiver inputs
• High common-mode transient immunity: >25 kV/μs
• Thermal shutdown protection
• Safety and regulatory certifications: UL recognized (pending) per UL 1577, 1 minute 5000 V rms; CSA Component Acceptance Notice #5A (pending); IEC 60601-1: 400 V rms (Basic), 250 V rms (Reinforced); IEC 60950-1: 600 V rms (Basic), 380 V rms (Reinforced); VDE certificate of conformity (pending); DIN EN 60747-5-2 (VDE 0884 Part 2): 2003-01, V_IORM = 846 V peak
• Operating temperature range: -40°C to +85°C
• 16-lead wide-body SOIC package with greater than 8 mm creepage and clearance

Applications

• Isolated RS-485/RS-422 interface
• Industrial field networks
• Multipoint data transmission systems