1. LM258AWDT Substitution Conclusion The LM258AWDT is not a direct substitute for the TLE2061ID, as significant differences in key performance parameters may lead to degraded system performance or failure. The primary discrepancies are as follows: First, the input bias current (LM258AWDT: 20 nA vs. TLE2061ID: 4 pA) is substantially higher for the LM258AWDT. This will introduce greater error in circuits with high-impedance sensors or in precision integrator applications. Second, the LM258AWDT's lower slew rate (0.6 V/µs vs. 3.4 V/µs) and gain-bandwidth product (1.1 MHz vs. 2 MHz) limit the speed of signal processing and the achievable frequency response. Third, its higher input offset voltage (1 mV vs. 600 µV) adversely affects DC precision. Fourth, the LM258AWDT's supply current (700 µA) is significantly greater than that of the TLE2061ID (290 µA), making it unsuitable for low-power designs. While the LM258AWDT offers advantages such as dual-channel architecture, a wider low-voltage supply range (down to 3V), and automotive-grade qualification (AEC-Q100), its core specifications do not meet the original design requirements for high input impedance, fast response, or low power consumption. It may only be considered for use in applications with minimal demands for precision and speed, where a dual-channel device is required, and only after careful evaluation.