ایزولاتور ایزولاتور دیجیتال

Product Attributes

Introduction

The ADM2561E, ADM2563E, ADM2565E, and ADM2567E are 3 kV rms signal and power isolated RS-485 transceivers. These devices are designed for balanced transmission lines and comply with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E). The devices pass radiated emissions testing to the EN 55032 Class B standard with margin on a 2-layer printed circuit board (PCB) using two small external 6402 ferrites on isolated power and ground pins. The device features an integrated, low electromagnetic interference (EMI), isolated dc-to-dc converter, which eliminates the need for an external isolated power supply. The isolation barrier provides immunity to system level electromagnetic compatibility (EMC) standards. The family of isolator devices features ±12 kV contact and ±15 kV air IEC61000-4-2 ESD protection on the RS-485 A, B, Y, and Z pins. The devices also features cable invert pins, allowing the user to quickly correct reversed cable connection on the A, B, Y, and Z bus pins while maintaining full receiver fail-safe performance. Slew rate limited versions are available, which are optimized for low speed over long cable runs, and have a maximum data rate of 500 kbps. Half duplex and full duplex variants are available. The full duplex generics allow independent cable inversion of the driver and receiver for additional flexibility.

Features

• 3 kV rms isolated RS-485/RS-422 transceiver
• Low radiated emissions, integrated, isolated dc-to-dc converter
• Passes EN 55032 Class B with margin on a 2-layer PCB
• Cable invert smart feature
• Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature
• ESD protection on RS-485 A, B, Y and Z pins ≥ ±12 kV IEC61000-4-2 contact discharge ≥ ±15 kV IEC61000-4-2 air discharge
• High speed 25 Mbps data rate (ADM2565E/ADM2567E)
• Low speed 500 kbps data rate for EMI control (ADM2561E/ADM2563E)
• Flexible power supplies
• Input VCC supply of 3 V to 5.5 V
• Logic V10 supply of 1.7 V to 5.5 V
• VSEL pin to select V150 supply of 5 V (VCC > 4.5 V) or 3.3 V
• PROFIBUS compliant for 5V150
• Wide operating temperature range: -40°C to +105°C
• High common-mode transient immunity: 250 kV/μs
• Short-circuit, open-circuit, and floating input receiver fail-safe
• Supports 192 bus nodes (72 kΩ receiver input impedance)
• Full hot swap support (glitch free power-up/power-down)
• Safety and regulatory approvals (pending) CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1
• Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E)
• 28-lead, fine pitch SOIC_W package (10.15 mm × 10.05 mm) with >8.0 mm creepage and clearance

Applications

• Heating, ventilation, and air conditioning (HVAC) networks
• Industrial field buses
• Building automation
• Utility networks
• Energy meters