MAX471中文资料高精度、高边电流检测放大器数据手册ADI规格书

描述 Description

The MAX471/MAX472 are complete, bidirectional, high-side current-sense amplifiers for portable PCs, telephones, and other systems where battery/DC power-line monitoring is critical. High-side power-line monitoring is especially useful in battery-powered systems, since it does not interfere with the ground paths of the battery chargers or monitors often found in \"smart\" batteries.
The MAX471 has an internal 35mΩ current-sense resistor and measures battery currents up to ±3A. For applications requiring higher current or increased flexibility, the MAX472 functions with external sense and gain-setting resistors. Both devices have a current output that can be converted to a ground-referred voltage with a single resistor, allowing a wide range of battery voltages and currents.
An open-collector SIGN output indicates current-flow direction, so the user can monitor whether a battery is being charged or discharged. Both devices operate from 3V to 36V, draw less than 100µA over temperature, and include a 18µA max shutdown mode.

特性 Features

• Complete High-Side Current Sensing
• Precision Internal Sense Resistor (MAX471)
• 2% Accuracy Over Temperature
• Monitors Both Charge and Discharge
• 3A Sense Capability with Internal Sense Resistor (MAX471)
• Higher Current-Sense Capability with External Sense Resistor (MAX472)
• 100µA Max Supply Current
• 18µA Max Shutdown Mode
• 3V to 36V Supply Operation
• 8-Pin DIP/SO Packages

应用 Application

• 电池供电应用
• 蜂窝电话
• 能量管理
• 便携式PC：笔记本电脑、亚笔记本电脑、掌上电脑
• 便携电话
• 便携式测试/测量系统
• 智能电池组/充电器

简介

MAX471属于集成电路（IC）的模拟开关多路复用器解复用器。由ADI制造生产的MAX471模拟开关，多路复用器，解复用器该系列产品可用于在多个可用信号路径之间互连或路由模拟信号。功能类似于传统的机电开关，但与机电开关相比，它们的固态特性有利于电子控制、延长使用寿命及降低开关噪声，但作为代价，切换信号的幅度和偏压限制有所增加。