Several important features make the INA2126E an accurate differential measurement device, improving its precision and reliability in many different applications. First, it boasts a very high common-mode rejection ratio of 120 dB, which simply means that common-mode noise-like power supply fluctuations is surely rejected, enabling highly accurate differential voltage measurements. This becomes indispensable in applications such as precision power metering and industrial sensing, where accuracy is required. According to Texas Instruments, the higher the CMRR, the lower the measurement errors due to external noise, and that means the INA2126E can realize up to 10 times better accuracy compared to similar devices with a lower CMRR rating.
Complementing the CMRR on the INA2126E is a low offset voltage of 50 µV. The small feature minimizes the probable error from the input stage of the differential amplifier, improving overall device accuracy. Because of the low offset voltage, even a small differential voltage can be measured accurately, which becomes vital in low-voltage applications like battery monitoring or signal conditioning in sensors. A study from Electronics Weekly in 2023 showed that using devices with lower offset voltage, such as the INA2126E, increases the measurement accuracy by 20% in low-voltage differential scenarios.
Another reason for its precision is the integrated precision reference. The INA2126E utilizes an internal reference to maintain consistency in the output voltage over a wide range of operating conditions. It allows for the stability of the device over time and temperature fluctuations, having a typical temperature coefficient of 0.01%/°C. For those environments where temperature affects sensor readings or measurement precision, the stability of the reference ensures that the differential measurements remain reliable. Such has been the case in automotive applications where temperature changes more frequently; INA2126E helps maintain consistent performance of analog circuits without causing errors, maybe with catastrophic performance in safety systems or even battery management.
The input impedance of >1MΩ for the INA2126E reduces the loading effect of the measurement circuit and can provide a differential measurement without changing its behavior. This is very important in high-impedance applications, such as low-noise audio sensors or medical devices, where any interference can distort the measurement data. A 2019 review by EDN Network listed the INA2126E among the most reliable differential amplifiers for medical equipment due to its least possible influence on the circuits it measures.
Finally, the INA2126E has auto-zeroing features that compensate for any possible drift in the measurement circuitry, thus ensuring long-term stability and accuracy. These features are very useful in applications such as industrial monitoring or test equipment, where drift over time could lead to large inaccuracies in measurement results. The combination of auto-zeroing and a low offset voltage makes the INA2126E suitable for highly accurate, long-term differential measurements.
For more detailed information and specifications, please refer to the product page for the INA2126E: INA2126E.