IN±2

IN+2

VS

OUT2

IN±1

IN+1

OUT1

+

±

GND

+

±

Copyright © 201 7, Texas Instrumen ts Incorpor ate d

INA2180

IN±

IN+

GND

VS

OUT

INA180

+

±

Copyright © 2017, Texas Instruments Incorporated

13

INA180, INA2180, INA4180

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SBOS741B – APRIL 2017 – REVISED NOVEMBER 2017

Product Folder Links: INA180 INA2180 INA4180

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Copyright © 2017, Texas Instruments Incorporated

8 Detailed Description

8.1 Overview

The INA180, INA2180, and INA4180 (INAx180) are 26-V, common-mode, current-sensing amplifiers used in both

low-side and high-side configurations. These specially-designed, current-sensing amplifiers accurately measures

voltages developed across current-sensing resistors on common-mode voltages that far exceed the supply

voltage powering the device. Current can be measured on input voltage rails as high as 26 V, and the devices

can be powered from supply voltages as low as 2.7 V.

8.2 Functional Block Diagrams

Figure 34. INA180 Functional Block Diagram

Figure 35. INA2180 Functional Block Diagram