0

20

40

60

80

100

0.1

1

10

100

Time (s)

C027

5

7.5

10

12.5

15

17.5

20

±50

±25

0

25

50

75

100

125

150

Temperature (

ƒC)

C026

8

INA253

SLOS954 – MAY 2018

www.ti.com

Product Folder Links: INA253

Submit Documentation Feedback

Copyright © 2018, Texas Instruments Incorporated

Feature Description (continued)

External factors (such as ambient temperature, external air flow, and PCB layout) can contribute to how

effectively the heat developed as a result of the current flowing through the total package resistance can be

removed from within the device. Under the conditions of no air flow, a maximum ambient temperature of 85°C,

and 1-oz. copper input power planes, the INA253 can accommodate continuous current levels up to 15 A. As

shown in Figure 1, the current handling capability is derated at temperatures above the 85°C level with safe

operation up to 10 A at a 125°C ambient temperature. With air flow and larger 2-oz. copper input power planes,

the INA253 can safely accommodate continuous current levels up to 15 A over the entire –40°C to 125°C

temperature range.

Figure 1. Maximum Continuous Current vs Temperature

8.3.2 Short-Circuit Duration

The INA253 features a physical shunt resistance that is able to withstand current levels higher than the

continuous handling limit of 15 A without sustaining damage to the current-sensing resistor or the current-sensing

amplifier if the excursions are brief. Figure 2 shows the short-circuit duration curve for the INA253.

Figure 2. Short-Circuit Duration

8.3.3 Temperature Stability

System calibration is common for many industrial applications to eliminate initial component and system-level

errors that can be present. A system-level calibration can reduce the initial accuracy requirement for many of the

individual components because the errors associated with these components are effectively eliminated through

the calibration procedure.

Performing this calibration enables precision measurements at the temperature in

which the system is calibrated. As the system temperature changes as a result of external ambient changes or

due to self heating, measurement errors are reintroduced. Without accurate temperature compensation used in