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MAX22026

更新时间： 2024-11-17 14:57:27
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亚德诺 - ADI /
页数 文件大小 规格书
23页 711K
描述
小尺寸、隔离型、半双工RS-485/RS-422收发器，带有AutoDirection (自动选向)控制

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MAX22026 数据手册

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Click here to ask an associate for production status of specific part numbers.  
Compact, Isolated, Half-Duplex RS-485/RS-422  
Transceivers with AutoDirection Control  
MAX22025-MAX22028/  
MAX22025F-MAX22028F  
General Description  
Benefits and Features  
The  
MAX22025-MAX22028/MAX22025F-MAX22028F  
● High-Level Integration Reduces Overall Solution Size  
• Fully Isolated Half-Duplex RS-485/RS-422  
Transceivers  
compact isolated RS-485/RS-422 transceivers provide  
3.5kV  
of digital galvanic isolation between the cable-  
RMS  
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.  
• 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)  
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.  
• Withstands 3.5kV  
Isolation Voltage for 60  
RMS  
Seconds (V  
)
ISO  
• Withstands 630V  
Maximum Repetitive Peak-  
PEAK  
Isolation Voltage (V  
• Continuously Withstands 445V  
)
IORM  
The  
MAX22025/MAX22027/MAX22025F/MAX22027F  
Maximum  
RMS  
feature reduced slew rate drivers that minimize EMI and  
reduce reflections caused by improper termination of ca-  
ble 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.  
Working-Isolation Voltage (V  
)
IOWM  
● 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 RE  
Control Signals  
The receiver output of the MAX22025/MAX22026/  
MAX22025F/MAX22026F does not follow (V -V ) when  
A
B
the device is in the driver-enabled state. The receiver  
output on the MAX22027/MAX22028/MAX22027F/  
MAX22028F always follows (V -V ).  
A
B
Safety Regulatory Approvals  
● UL According to UL1577  
● cUL According to CSA Bulletin 5A  
The driver outputs and receiver inputs are protected from  
±10kV electrostatic discharge (ESD) to GNDB on the ca-  
ble 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  
19-100636; Rev 8; 3/22  
Ordering Information appears at end of data sheet.  
© 2022 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.  
One Analog Way, Wilmington, MA 01887 U.S.A. | Tel: 781.329.4700 | © 2022 Analog Devices, Inc. All rights reserved.  
 
 
 
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