ایزولاتور ایزولاتور دیجیتال

Product Attributes

Introduction

The MAX14434–MAX14436 are the fastest, lowest power, 4-channel, digital galvanic isolators using proprietary process technology. These devices transfer digital signals between circuits with different power domains while using as little as 0.58mW per channel at 1Mbps with a 1.8V supply. The MAX14434/5/6 have an isolation rating of 5kVRMS for 60 seconds. The MAX14434–MAX14436 family offers all three possible unidirectional channel configurations to accommodate any 4-channel design, including SPI, RS-232, RS-485, and digital I/O applications. Output enable for the A side of the MAX14435R/S/U/V is activelow, making them ideal for isolating a port on a shared SPI bus since the CS signal can directly enable the MISO signal on the isolator. All other devices in the family have the traditional active-high enable. Devices are available with a maximum data rate of either 25Mbps or 200Mbps and with outputs that are either default-high or default-low. The default is the state the output assumes when the input is either not powered or is open-circuit. Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators. The MAX14434–MAX14436 are available in a 16-pin widebody SOIC package with 8mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 600V, which gives it a group 1 rating in creepage tables. All devices are rated for operation at ambient temperatures of -40°C to +125°C.

Features

• Robust Galvanic Isolation for Fast Digital Signals
• 200Mbps Data Rate
• Withstands 5kVRMS for 60s (VISO)
• Continuously Withstands 848VRMS (VIOWM)
• Withstands ±10kV Surge between GNDA and GNDB with 1.2/50μs waveform
• High CMTI (50kV/μs, Typical)
• Low Power Consumption
• 1.1mW per Channel at 1Mbps with VDD = 3.3V
• 3.5mW per Channel at 100Mbps with VDD = 1.8V
• Options to Support a Broad Range of Applications
• 2 Data Rates (25Mbps, 200Mbps)
• 3 Channel Direction Configurations
• 2 Output Default States (High/Low)

Applications

• Fieldbus Communications for Industrial Automation
• Isolated RS-485/RS-422, CAN
• General Isolation Application
• Battery Management Medical Systems