INA700 datasheet(13/50 Pages) TI

13 / 50 page

Temperature ( C)

-50

-25

100

125

2.5

3.5

4.5

5.5

Figure 7-1. IN+ to IN– Package Resistance vs Temperature

The internal compensation of the INA700 corrects for pin-to-pin resistance increases with temperature, achieving

less than 50 ppm/°C drift over the ambient temperature range.

The INA700 is most accurate when measuring currents around 5 A. As currents increase the error in the current

measurement also increases. Figure 7-2 below shows how the gain error of the INA700 varies with the shunt

current.

Shunt Current (A)

2.5

7.5

12.5

-0.5

0.5

1.5

2.5

3.5

Figure 7-2. Gain Error vs Shunt Current

The change in gain error is consistent enough from device to device that returned values can be scaled up or

down depending on the shunt current to give a more accurate result. For example, to achieve higher accuracy

when measuring currents around 7 A, the returned value can be scaled down by approximately 0.4%.

7.3.2 Safe Operating Area

The power dissipated in the device limits the maximum current that can be safely handled by the device. The

current consumed to power the device is low, therefore the primary source of heating is due to the current flow

through the internal shunt resistor. The maximum safe-operating current level shown in Figure 7-3 is set so that

the heat generated in the package is limited and the internal junction temperature of the silicon does not exceed

125°C. This data was collected on the evaluation module that uses a 2-layer board with 1-oz copper power

planes to the INA700 IN+ and IN– pins.

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INA700

SBOSAB4A – MAY 2023 – REVISED SEPTEMBER 2023

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INA700 데이터시트(PDF) 13 Page - Texas Instruments