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MAX22346CAAP+

ADIMAX22346CAAP+

Analog Devices Inc./Maxim Integrated
CAN, RS422, RS485, SPI Digital Isolator 3750Vrms 4 Channel 200Mbps 50kV/µs (Typ) CMTI 20-SSOP (0.209", 5.30mm Width)
Active664 in stock

Overview

The MAX22346CAAP+ is a high-speed, four-channel digital galvanic isolator utilizing Maxim Integrated's proprietary capacitive-coupling technology. It supports data rates up to 200Mbps and provides 3750Vrms of isolation for up to 60 seconds. This variant features a 2/2 unidirectional channel configuration, making it ideal for bidirectional buses like SPI or independent control lines.

Why Choose This Part

This device offers a wide supply voltage range from 1.71V to 5.5V, allowing direct interfacing with low-voltage FPGAs and high-voltage industrial logic. It features high CMTI of 50kV/us (typical), ensuring robust data integrity during fast common-mode transients. The 20-SSOP package provides a compact footprint for high-density multi-channel isolation requirements.

Applications

Industrial Fieldbus Isolation
Protects sensitive controllers in RS-485, RS-422, and CAN bus networks from high-voltage transients and ground loops.
Isolated SPI Interfaces
Enables high-speed 200Mbps communication between microcontrollers and ADCs or DACs in electrically noisy environments.
Battery Management Systems
Safely bridges communication across high-voltage battery stacks to low-voltage monitoring circuitry.
Motor Control Feedback
Isolates PWM signals and encoder feedback in inverter stages to prevent power stage noise from affecting the processor.

Key Specifications

Type CAN, RS422, RS485, SPI
Data Rate 200Mbps
Technology Capacitive Coupling
Channel Type Unidirectional
Mounting Type Surface Mount
Isolated Power No
Package / Case 20-SSOP (0.209", 5.30mm Width)
Voltage - Supply 1.71V ~ 5.5V
Number of Channels 4
Voltage - Isolation 3750Vrms
Operating Temperature -40degC ~ 125degC
Inputs - Side 1/Side 2 2/2
Rise / Fall Time (Typ) 0.8ns, 1ns (Max)
Supplier Device Package 20-SSOP
Pulse Width Distortion (Max) 2ns
Propagation Delay tpLH / tpHL (Max) 9.2ns, 9.4ns
Common Mode Transient Immunity (Min) 50kV/us (Typ)

Getting Started

For rapid prototyping, utilize the MAX22345EVKIT# evaluation kit to verify timing and signal integrity across the isolation barrier. Ensure bypass capacitors of 0.1uF are placed as close as possible to the VDD pins on both the primary and secondary sides. Refer to the datasheet for specific layout guidelines regarding creepage and clearance distances to maintain the 3750Vrms isolation rating.