Maxim Integrated MAX14435 4-Channel Digital Isolator

Maxim Integrated MAX14435 4-Channel Digital Isolator is a fast, low-power digital galvanic isolator using Maxim's patented process technology. The MAX14435 transfers digital signals between circuits with different power domains. The isolator is powered by a 1.8V power supply, with a power of 0.58mW per channel at 1Mbps, and an isolation rating of 5kVRMS (60 seconds). The A-side output enable of the MAX14435R/S/U/V is active low. Therefore, this device is ideal for isolating ports on a shared SPI bus, as the CS signal can directly enable the MISO signal on the isolator.

The MAX14435 is available in a 16-pin wide-body SOIC package with 8mm of creepage and clearance. The encapsulation material has a minimum comparative leakage index (CTI) of 600V, which gives it a group 1 rating in the creepage distance table. All devices are rated for ambient operating temperature from -40°C to +125°C.

FEATURES

Fast and reliable electrical isolation of digital signals

200Mbps data rate

Withstands 5kVRMS for 60 seconds (VISO)

Continuous 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, VDD=3.3V

3.5mW per channel at 100Mbps, VDD=1.8V

Multiple options to support various applications

2 data rates (25Mbps, 200Mbps)

3-channel orientation configuration

2 output default states (high/low level)

application

Industrial Automation Fieldbus Communication

Isolated RS-485/RS-422, CAN

General Isolation Application

battery management

medical system

Typical Application Circuit

Block Diagram - Maxim Integrated MAX14435 4-Channel Digital Isolator