SBOS956 December 2018 INA240-SEP
The INA240-SEP electrical specifications (see the Electrical Characteristics table) include typical individual errors terms (such as gain error, offset error, and nonlinearity error). Total error, including all of these individual error components, is not specified in the Electrical Characteristics table. In order to accurately calculate the expected error of the device, the device operating conditions must first be known. Some current-shunt monitors specify a total error in the product data sheet. However, this total error term is accurate under only one particular set of operating conditions. Specifying the total error at this point has limited value because any deviation from these specific operating conditions no longer yields the same total error value. This section discusses the individual error sources and how the device total error value can be calculated from the combination of these errors for specific conditions.
Two examples are provided in Table 2 and Table 3 that detail how different operating conditions can affect the total error calculations. Typical and maximum calculations are shown as well to provide the user more information on how much error variance is present from device to device.