ایزولاتور ایزولاتور دیجیتال

Product Attributes

Introduction

The ADuM440x are 4-channel digital isolators based on iCoupler technology. Combining high speed CMOS and monolithic air core transformer technology, these isolation components provide outstanding performance characteristics that are superior to the alternatives, such as optocoupler devices and other integrated couplers. The ADuM440x isolators provide four independent isolation channels in a variety of channel configurations and data rates. All models operate with the supply voltage on either side ranging from 3.0 V to 5.5 V, providing compatibility with lower voltage systems as well as enabling a voltage translation functionality across the isolation barrier. The ADuM440x isolators have a patented refresh feature that ensures dc correctness in the absence of input logic transitions and during power-up/power-down conditions. This family of isolators offers very low power consumption, consuming one-tenth to one-sixth the power of comparable isolators at comparable data rates up to 10 Mbps. All models of the ADuM440x provide low pulse width distortion (<2 ns for C grade). In addition, every model has an input glitch filter to protect against extraneous noise disturbances. The ADuM440x contain circuit and layout enhancements to help achieve system-level IEC 61000-4-x compliance (ESD/burst/surge). The precise capability in these tests for the ADuM440x are strongly determined by the design and layout of the user’s board or module.

Features

• Enhanced system-level ESD performance per IEC 61000-4-x
• Safety and regulatory approvals (RI-16 package) UL recognition: 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A IEC 60601-1: 250 V rms (reinforced) IEC 60950-1: 400 V rms (reinforced) VDE Certificate of Conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 V10RM = 846 V peak
• Low power operation 5 V operation 1.4 mA per channel maximum @ 0 Mbps to 2 Mbps 4.3 mA per channel maximum @ 10 Mbps 34 mA per channel maximum @ 90 Mbps 3.3 V operation 0.9 mA per channel maximum @ 0 Mbps to 2 Mbps 2.4 mA per channel maximum @ 10 Mbps 20 mA per channel maximum @ 90 Mbps
• Bidirectional communication
• 3.3 V/5 V level translation
• High temperature operation: 105°C
• High data rate: dc to 90 Mbps (NRZ)
• Precise timing characteristics 2 ns maximum pulse width distortion 2 ns maximum channel-to-channel matching
• High common-mode transient immunity: >25 kV/μs
• Output enable function
• 16-lead SOIC wide body package version (RW-16)
• 16-lead SOIC wide body enhanced creepage version (RI-16)

Applications

• General-purpose, high voltage, multichannel isolation
• Medical equipment
• Motor drives
• Power supplies