MAX22026FAWA+

Overview

The MAX22026FAWA+ is a compact, isolated half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It provides 3.5kVRMS of digital galvanic isolation between the UART side and the cable side. The device supports data rates up to 16Mbps with non-slew-rate-limited driver outputs. It operates with a VDDA supply range of 1.71V to 5.5V and a VDDB supply range of 4.75V to 5.25V. The receiver input hysteresis is specified at 25mV. The component is housed in an 8-pin wide body SOIC package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated AutoDirection control eliminates the need for separate driver-enable and receiver-enable signals by using an internal state machine.
• Provides robust communication through 3.5kVRMS isolation voltage and ±10kV ESD protection on driver outputs and receiver inputs.
• Features high-speed driver outputs capable of transmitting data at speeds up to 16Mbps without slew-rate limiting.

Applications

• Utility Meters
• Industrial Automation Equipment
• Programmable Logic Controllers
• HVAC Systems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm RoHS compliance and package type. Confirm that the requested part number matches the exact functional variant required for the design. Ensure compatibility with the intended operating temperature range and supply voltage requirements before finalizing procurement orders.

Selection Notes

Select this component when high-speed transmission up to 16Mbps is required alongside galvanic isolation. The MAX22026 variant specifically lacks slew-rate limiting, distinguishing it from the 0.5Mbps MAX22025/MAX22027 models. Verify that the system design accommodates the necessary pullup and pulldown resistors on the A and B lines for proper AutoDirection operation.

Part Context

This device belongs to the MAX22025-MAX22028 family of isolated transceivers. The 'F' in the model name indicates the inclusion of failsafe receiver functionality. The 'W' denotes the 8-pin wide body SOIC package. The '+' suffix signifies lead-free and RoHS compliant manufacturing standards as defined by the manufacturer.

Replacement Considerations

The MAX22028FAWA+ serves as a direct functional substitute within the same family, sharing identical specifications and pinout configurations. Both components utilize the same AutoDirection control mechanism and isolation ratings.