INA180

2.7 V to 5.5 V

ADC

Microcontroller

Bus Voltage

±0.2 V to +26 V

GND

VS

Load

IN±

IN+

OUT

+

±

0.1 µF

Copyright © 2017, Texas Instruments Incorporated

17

INA180, INA2180

www.ti.com

SBOS741A – APRIL 2017 – REVISED AUGUST 2017

Product Folder Links: INA180 INA2180

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Copyright © 2017, Texas Instruments Incorporated

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The INAx180 amplify the voltage developed across a current-sensing resistor as current flows through the

resistor to the load or ground.

9.1.1 Basic Connections

Figure 39 shows the basic connections of the INA180. Connect the input pins (IN+ and IN–) as closely as

possible to the shunt resistor to minimize any resistance in series with the shunt resistor.

NOTE: For best measurement accuracy, connect analog-to-digital converter (ADC) reference or microcontroller

ground as closely as possible to the INAx180 GND pin.

Figure 39. Basic Connections for the INA180

A power-supply bypass capacitor of at least 0.1 µF is required for proper operation. Applications with noisy or

high-impedance power supplies may require additional decoupling capacitors to reject power-supply noise.

Connect bypass capacitors close to the device pins.