MAX22027
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MAX22027

Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control

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Tiny, Isolated RS-485/RS-422 Transceiver

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
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IBIS Model MAX22027 IBIS Model Download 447.95KB
Part Models 2
1ku List Price Starting From $1.92
Features
  • High-Level Integration Reduces Overall Solution Size
    • Fully Isolated Half-Duplex RS-485/RS-422 Transceivers
    • Compact 8-Pin Wide Body SOIC Package (5.5mm Creepage)
  • Integrated Protection Ensures Robust Communication
    • ±10kV ESD (HBM) on Driver Outputs/Receiver Inputs
    • Failsafe Receiver Prevents Fault Transition on Receiver Input Short or Open Events (MAX22025F– MAX22028F)
    • Withstands 3.5kVRMS Isolation Voltage for 60 Seconds (VISO)
    • Withstands 630VPEAK Maximum Repetitive Peak- Isolation Voltage (VIORM)
    • Continuously Withstands 445VRMS Maximum Working-Isolation Voltage (VIOWM)
  • Enables Flexible System Design
    • 0.5Mbps Maximum Data Rate with Slew-Rate Limited Driver (MAX22025/MAX22027/MAX22025F/MAX22027F)
    • 16Mbps Maximum Data Rate ((MAX22026/MAX22028/MAX22026F/MAX22028F)
    • AutoDirection Eliminates the Need for DE and Active-Low RE Control Signals
Additional Details
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The MAX22025–MAX22028/MAX22025F–MAX22028F compact isolated RS-485/ RS-422 transceivers provide 3.5kVRMS of digital galvanic isolation between the cable-side (RS-485/RS-422 driver/ receiver-side) and the UART-side of the device. Isolation improves communication by breaking ground loops and reduces noise when there are large differences in ground potential between ports. These devices allow for robust communication up to 0.5Mbps or 16Mbps.

The MAX22025–MAX22028/MAX22025F–MAX22028F feature Maxim’s proprietary AutoDirection control making these devices ideal for applications such as isolated RS-485 ports, where the driver input is used in conjunction with the driver-enable signal to drive the differential bus.

The MAX22025/MAX22027/MAX22025F/MAX22027F feature reduced slew rate drivers that minimize EMI and reduce reflections caused by improper termination of cable allowing error-free transmission up to 0.5Mbps. The MAX22026/MAX22028/MAX22026F/MAX22028F driver outputs are not slew-rate limited, allowing transmit speeds up to 16Mbps.

The receiver output of the MAX22025/MAX22026/MAX22025F/MAX22026F does not follow (VA-VB) when the device is in the driverenabled state. The receiver output on the MAX22027/MAX22028/MAX22027F/ MAX22028F always follows (VA-VB).

The driver outputs and receiver inputs are protected from ±10kV electrostatic discharge (ESD) to GNDB on the cable side, as specified by the Human Body Model (HBM). The MAX22025–MAX22028/MAX22025F–MAX22028F are available in a compact 8-pin wide body SOIC package and operate over the -40°C to +85°C temperature range.

Applications

  • Utility Meters
  • Industrial Automation Equipment
  • Programmable Logic Controllers
  • HVAC
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file View Data Sheet (Rev.8)
Documentation View All Documentation
IBIS Model MAX22027 IBIS Model Download 447.95KB
Part Models 2
1ku List Price Starting From $1.92
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MAX22027

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Data Sheet

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UPDATED 06/09/2022
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MAX22025-MAX22028F: Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with AutoDirection Control Data Sheet (Rev.8)

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Safety and Regulatory Compliance

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UPDATED 01/28/2016
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UPDATED 01/28/2016
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Documentation

Safety and Regulatory Compliance 1

Safety and Regulatory Compliance Information

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2022-10-04

03:32

Introduction to the MAX22025, MAX22026, MAX22027, MAX22028, MAX22025F/26F/27F/28F Compact, Isolated, Half-Duplex RS-485/RS-422 Transceivers with Autodirection Control

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX22027AWA+ 8-SOIC_W-300_MIL external-link
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MAX22027AWA+T 8-SOIC_W-300_MIL external-link
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Software & Part Ecosystem

Evaluation Kits 1

MAX2202XEVKIT

Evaluation Kit for the MAX22025, MAX22026, MAX22027, MAX22028, MAX22025F, MAX22026F, MAX22027F, MAX22028F

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MAX2202XEVKIT

Evaluation Kit for the MAX22025, MAX22026, MAX22027, MAX22028, MAX22025F, MAX22026F, MAX22027F, MAX22028F

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MAX2202XEVKIT
Evaluation Kit for the MAX22025, MAX22026, MAX22027, MAX22028, MAX22025F, MAX22026F, MAX22027F, MAX22028F

Features and Benefits

  • Operates from a Single 3.3V Supply
  • Terminal Block Connector for Easy RS-485 Evaluation
  • 3500VRMS Isolation for 60s
  • Fully Assembled and Tested
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Product Detail

The MAX2202XEVKIT# evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the functionality of the MAX22028 isolated RS-485 transceiver with AutoDirection. The EV kit operates from a single 3.3V supply and features an on-board isolated power supply to power the secondary side of the circuit.

The MAX2202X EV kit ships with the MAX22028 installed. The board can also be used to evaluate the MAX22025– MAX22027 and the MAX22025F–MAX22028F.

Applications

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

Resources

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MAX2202XEVKIT ODB Files - Design Files Download

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Evaluation Kits1

MAX2202XEVKIT

Evaluation Kit for the MAX22025, MAX22026, MAX22027, MAX22028, MAX22025F, MAX22026F, MAX22027F, MAX22028F

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