SBOS932C January 2020 – March 2021 THP210
The THP210 offers excellent dc accuracy at room temperature. In many applications, calibration techniques are used to minimize the initial dc error; however, performing calibration over temperature is time-consuming and expensive.
The advanced drift specification of the THP210 helps to further mitigate the system error over temperature. Figure 9-3 depicts the total error voltage at these given conditions:
The main contributors that are considered in this analysis are offset voltage drift, offset current drift, and bias current drift. As a result of the ultra-low bias current drift of 15 pA/°C, the impact of higher gain resistors and resistor tolerances marginally affects the error voltage with the THP210.
A use case at a gain of 5 V/V shows that the total dc error over temperature of the THP210 is at 66 µV, which is at least a factor of 10 smaller compared to existing, state-of-the-art FDAs.