MAX3157 - 高共模抑制比RS-485收发器，带有±50V隔离

MAX3157是Maxim美信半导体公司的一款传感器与传感器接口产品，MAX3157是高共模抑制比RS-485收发器，带有±50V隔离，本站介绍了MAX3157的封装应用图解、特点和优点、功能等，并给出了与MAX3157相关的Maxim元器件型号供参考。

MAX3157 - 高共模抑制比RS-485收发器，带有±50V隔离 - 传感器与传感器接口 - 低成本、±50V隔离、RS-485/RS-422收发器，提供表贴封装 - 美信半导体

产品概述

The MAX3157 is a high CMRR RS-485/RS-422 data-communications interface providing ±50V isolation in a hybrid microcircuit. A single +5V supply on the logic side powers both sides of the interface, with external ±50V capacitors transferring power from the logic side to the isolated side. Each MAX3157 contains one transmitter and one receiver and is guaranteed to operate at data rates up to 250kbps. Drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic high receiver output if the inputs are open, shorted, or connected to a terminated transmission line with all drivers disabled.

The MAX3157 typically draws 25mA of supply current when unloaded or when fully loaded with the driver disabled. Supply current drops to 25µA when the device is placed in shutdown mode. The device is pin selectable between half- and full-duplex mode and also features independently programmable receiver and transmitter output phase through separate pins. The MAX3157 is a low-cost replacement for opto-isolated transceivers. For fully isolated RS-485/RS-422 transceivers, refer to the MAX1480 family data sheet.

关键特性

以下关键特性由Maxim美信半导体提供：

±50V Isolated Data Interface

+5V Single Supply

Low-Cost Replacement for Opto-Isolated Transceivers

True Fail-Safe Receiver While Maintaining EIA/TIA-485 Compliance

Pin-Selectable Full/Half-Duplex Operation

Phase Controls to Correct for Twisted-Pair Reversal

25µA Low-Power Shutdown Mode

Thermal Shutdown for Driver Overload Protection

28-Pin SSOP Package

Slew Rate Limited Reduced EMI

热门应用

自动测试设备(ATE)

楼宇能源管理(HVAC)

楼宇安全/遥控相机

高速接入(电信)

工业传感器发送器/变送器

电机及运动控制

POS终端

可编程逻辑控制器

远端摄像机

电信交换机

测试与测量设备

X射线与超声诊断

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