INA181A2IDBVT datasheet(27/62 Pages) TI2

Part #	INA181A2IDBVT

Description	INAx181 Bidirectional, Low- and High-Side Voltage Output, Current-Sense Amplifiers

PDF	62 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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27 / 62 page

8.1.4 Summing Multiple Currents

The outputs of the INA2181 are easily summed by connecting the output of one channel to the reference input of

a second channel. The circuit configuration shown in Figure 8-3 is an easy method to achieve current summing.

To correctly sum multiple output currents, the values for the current sense resistor RSENSE must be the same for

all channels.

Power

Supply

LOAD1

IN+1

IN±1

OUT1

GND

Dual-Channel

TI Device

IN±2

IN+2

OUT2

REF1

REF2

VOUT2 = (ILOAD1 + ILOAD2) × RSENSE × GAIN

LOAD2

RSENSE

ADC

Figure 8-3. Summing Multiple Currents

Connect the output of one channel of the INA2181 to the reference input of the other channel. Use the reference

input of the first circuit to set the reference of the final summed output operating point. The currents sensed at

each circuit in the chain are summed at the output of the last device in the chain.

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INA181, INA2181, INA4181

SBOS793H – APRIL 2017 – REVISED NOVEMBER 2023

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INA181A2IDBVT Datasheet(PDF) 27 Page - Texas Instruments