Datasheet > MAX14855

MAX14855

更新时间： 2024-11-30 14:57:31

品牌	Logo	应用领域
亚德诺 - ADI		变压器驱动驱动器
页数	文件大小	规格书
22页	744K
描述
2.75kVRMS隔离、500kbps/25Mbps、全双工RS-485/RS-422收发器，具有±35kV ESD保护和集成变压器驱动器

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中文翻译

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数据手册

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MAX14855 数据手册

EVALUATION KIT AVAILABLE

MAX14853/MAX14855

2.75kV

Isolated 500kbps/25Mbps Full-Duplex

RMS

RS-485/RS-422 Transceivers with ±35kV ESD

Protection and Integrated Transformer Driver

General Description

Beneﬁts and Features

The

MAX14853/MAX14855

isolated

RS-485/

● Higher Integration Simplifies Designs

• Integrated LDO for Powering Cable Side

• Integrated Transformer Driver for Power Transfer to

Cable Side

RS-422 transceivers provide 2750V

(60s) of galvanic

RMS

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 500kbps (MAX14853) or 25Mbps

(MAX14855).

● High-Performance Transceiver Enables Flexible

Designs

• Compliant with RS-485 EIA/TIA-485 Standard

• 500kbps (MAX14853)/25Mbps (MAX14855)

Maximum Data Rate

The MAX14853/MAX14855 include an integrated 450kHz

transformer driver for power transfer to the cable-side of

the transceiver using an external transformer. An integrated

LDO provides a simple and space-efficient architecture

for providing power to the cable-side of the IC.

• Up to 128 Devices on the Bus

• Slew-Rate Limited Outputs (MAX14853)

• Integrated Receiver Deglitch Filter Increases Noise

Immunity (MAX14853)

● Integrated Protection Ensures for Robust

Communication

The MAX14853/MAX14855 include one drive channel

and one receive channel. The receiver is ¼-unit load,

allowing up to 128 transceivers on a common bus.

• ±35kV ESD (HBM) on Driver Outputs/Receiver

Inputs

• 2.75kV

Withstand Isolation Voltage for 60s (V

)

RMS

ISO

Integrated true fail-safe circuitry ensures a logic-high on

the receiver output when inputs are shorted or open.

Undervoltage lockout disables the driver when cable-side

or UART-side power supplies are below functional levels.

• 630V

Maximum Repetitive Peak Isolation

PEAK

Voltage (V

)

IORM

• 445V

Maximum Working Isolation Voltage

RMS

)

IOWM

The driver outputs and receiver inputs are protected

from ±35kV electrostatic discharge (ESD) to GNDB on

the cable-side, as specified by the Human Body Model

(HBM).

• > 30 Years Lifetime at Rated Working Voltage

• Withstands ±10kV Surge per IEC 61000-4-5

• Thermal Shutdown

The MAX14853/MAX14855 are available in a wide body

16-pin SOIC package and operate over the -40°C to

+105°C temperature range.

Functional Diagram

Applications

TD1 TD2

V_DDA

V_LDO

● Industrial Automation Equipment

● Programmable Logic Controllers

● HVAC

MAX14853

MAX14855

LDO

XFMR

DRIVER

V_DDB

● Power Meters

Safety Regulatory Approvals

● UL According to UL1577

● cUL According to CSA Bulletin 5A

RXD

TXD

GNDA

GNDB

Ordering Information appears at end of data sheet.

19-7546; Rev 5; 10/17

12 3 4 5 6 7...22

中文翻译

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与MAX14855相关器件

型号	品牌	获取价格	描述	数据表
MAX14856	MAXIM	获取价格	5kVRMS Isolated 500kbps/25Mbps Full-Duplex
MAX14856	ADI	获取价格	5kVRMS隔离、500kbps/25Mbps全双工 RS-485/RS-422收发器，具
MAX14856GWE+	MAXIM	获取价格	Line Transceiver,
MAX14856GWE+T	MAXIM	获取价格	5kVRMS Isolated 500kbps/25Mbps Full-Duplex
MAX14857	ADI	获取价格	5kVRMS隔离、500kbps/25Mbps全双工、RS-485/RS-422收发器，具
MAX14858	MAXIM	获取价格	Operates From a Single 3.3V Supply
MAX14858	ADI	获取价格	5kVRMS隔离、500kbps/25Mbps全双工 RS-485/RS-422收发器，具
MAX14858GWE+	MAXIM	获取价格	5kVRMS Isolated 500kbps/25Mbps Full-Duplex
MAX14858GWE+T	MAXIM	获取价格	Line Transceiver,
MAX14859	ADI	获取价格	5kVRMS隔离、500kbps/25Mbps全双工、RS-485/RS-422收发器，具

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