INA186 datasheet(11/45 Pages) TI2

11 / 45 page

7 Detailed Description

7.1 Overview

The INA186 is a low bias current, low offset, 40-V common-mode, current-sensing amplifier. The DDF SOT-23

and YFD DSBGA packages also come with an enable pin. The INA186 is a specially designed, current-sensing

amplifier that accurately measures voltages developed across current-sensing resistors on common-mode

voltages that far exceed the supply voltage. Current is measured on input voltage rails as high as 40 V at VIN+

and VIN–, with a supply voltage, VS, as low as 1.7 V. When disabled, the output goes to a high-impedance state,

and the supply current draw is reduced to less than 0.1 µA. The INA186 is intended for use in both low-side and

high-side current-sensing configurations where high accuracy and low current consumption are required.

7.2 Functional Block Diagram

IN±

IN+

GND

OUT

REF

(2)

ENABLE

(1)

INA186

1. The ENABLE pin is available only in the DDF and YFD packages.

2. YFD packages without a REF pin have this node internally connected to GND.

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INA186

SBOS318B – APRIL 2019 – REVISED JULY 2021

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INA186 Datasheet(PDF) 11 Page - Texas Instruments