超小型、+1.8V、微功耗、满摆幅输入/输出运算放大器

 

器件号	Replacement	Explanation

说明

创建原理图或仿真器件，请使用EE-Sim^®:

The MAX4291/MAX4292/MAX4294 family of micropower operational amplifiers operates from a 1.8V to 5.5V single supply or ±0.9V to ±2.75V dual supplies and has Rail-to-Rail input/output capabilities. These amplifiers provide a 500kHz gain-bandwidth product and 120dB open-loop voltage gain while using only 100µA of supply current per amplifier. The combination of low input offset voltage (±200µV) and high open-loop gain makes them ideal for low-power/low-voltage, high-precision portable applications.

The MAX4291/MAX4292/MAX4294 have an input common-mode range that extends to each supply rail, and their outputs swing to within 46mV of the rails with a 2kΩ load. Although the minimum operating voltage is specified at 1.8V, these devices typically operate down to 1.5V. The combination of ultra-low-voltage operation, rail-to-rail inputs/output, and low-power consumption makes these devices ideal for any portable/two-cell battery-powered system.

The single MAX4291 is offered in an ultra-small 5-pin SC70 package. The dual MAX4292 is offered in a space-saving 8-bump, 1.5mm x 1.5mm footprint, ultra chip-scale package (UCSP™).

MAX4291、MAX4292、MAX4294：引脚配置 放大+

关键特性

• Ultra-Low Voltage Operation—Guaranteed Down to 1.8V
• 100µA Supply Current per Amplifier
• 500kHz Gain-Bandwidth Product
• 120dB Open-Loop Voltage Gain (R_L = 100kΩ)
• 0.017% Total Harmonic Distortion Plus Noise (THD + N) at 1kHz
• Rail-to-Rail Input Common-Mode Range
• Rail-to-Rail Output Drives 2kΩ Load
• No Phase Reversal for Overdriven Inputs
• Unity-Gain Stable for Capacitive Loads up to 100pF
• 200µV Input Offset Voltage (MAX4292/MAX4294)
• Single in Small 5-Pin SC70
• Available in Ultra-Small Packages:
  • 5-Pin SC70 (MAX4291)
  • 8-Bump UCSP (MAX4292)

应用

• 2节电池供电系统
• 汽车传感器
• 基站/无线基础架构
• 电池供电应用
• 蜂窝电话
• 计算机：台式机、工作站和服务器
• 计算机：主板
• 计算机：笔记本电脑
• 数字测量/张力计量
• GPS方案
• MP3坞站：中级
• 便携式电子设备
• 可编程逻辑控制器(PLC)
• 传感器放大器
• 机顶盒
• 应变仪