ADM1487中文资料Ultralow Power RS-485/RS-422 Transceiver数据手册ADI规格书

描述 Description

The ADM1487 is an ultralow power RS-485/RS-422 transceiverconsisting of one driver and one receiver per package. Quiescentoperating current is typically 80 µA and 1 µA in shutdown mode.The driver and receiver both have three-state outputs. This allows multiple drivers to be connected to an RS-485/RS-422 bus or several receiver outputs to be connected to a serial data bus. The driver will maintain a high impedance output state even with power off, while the receiver features fail-safe operation that guarantees a logic high output if the inputs are left open circuit.

The device has slew rate limited drivers to minimize electromagnetic interference (EMI) and reduce reflections caused by incorrectly terminated cable.

特性 Features

• 250 kbps data rate

• Glitch-free driver power-up allows
hot connection

• Driver maintains high output
impedance with power off

• Low power—120 µA max ICC with driver disabled

• High input impedance—up to 256 transceivers on bus



• Wide common-mode range allows
±7 V ground differences between
devices

• Low current (1 µA) shutdown mode

• Pin compatible with industry
standard 75176

• Slew rate control for error-free data transmission and low EMI

• ±10 kV ESD protection (human body model) on RS-485 I/O pins

简介

ADM1487属于集成电路（IC）的驱动器接收器收发器。由制造生产的ADM1487驱动器，接收器，收发器该系列产品的主要功能是提供必需的硬件资源，以通过延长电缆或印制线进行通信。确切的功能会因所采用的通信协议而异，可能包括诸如瞬态抑制之类的功能，这些功能对于通信用途可能并非绝对必要，但对于可能的使用环境却是明智之选。