+

IN+

IN-

REF

OUT

+

Bandgap

V+

EN

GND

GND

REF20xx

INA213B

+

±

+

±

ADC

18

REF2025, REF2030, REF2033, REF2041

SBOS600C – MAY 2014 – REVISED JANUARY 2017

www.ti.com

Product Folder Links: REF2025 REF2030 REF2033 REF2041

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Copyright © 2014–2017, Texas Instruments Incorporated

10 Applications 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.

10.1 Application Information

The low-drift, bidirectional, single-supply, low-side, current-sensing solution, described in this section, can

accurately detect load currents from –2.5 A to 2.5 A. The linear range of the output is from 250 mV to 2.75 V.

Positive current is represented by output voltages from 1.5 V to 2.75 V, whereas negative current is represented

by output voltages from 250 mV to 1.5 V. The difference amplifier is the INA213 current-shunt monitor, whose

supply and reference voltages are supplied by the low-drift REF2030.

10.2 Typical Application

10.2.1 Low-Side, Current-Sensing Application

Figure 49. Low-Side, Current-Sensing Application