1. AS324MTR-E1 Substitution Conclusion Based on key parameters and package, the AS324MTR-E1 can serve as a substitute for the LM2902DR2G. Both are general-purpose quad op-amps in a 14-SOIC package, sharing identical supply voltage ranges (3-32V vs. 3-36V, compatible), output current (40mA), and input offset voltage (2mV). The differences are as follows: First, the input bias current of the AS324MTR-E1 (20 nA) is significantly lower than that of the original part (90 nA). In circuits involving high-impedance signal sources, this results in a smaller input error voltage due to bias current, which is beneficial for improving accuracy. Second, the original part specifies a gain-bandwidth product (GBW) of 1 MHz, whereas this parameter is not explicitly stated for the AS324MTR-E1. For high-frequency applications or designs requiring a guaranteed GBW, it is necessary to verify whether the AS324MTR-E1 meets the requirements, as there is a risk of performance mismatch. For DC or mid-to-low frequency general-purpose applications such as amplification, comparators, and filtering circuits, the AS324MTR-E1 is a viable drop-in replacement. However, in bandwidth-sensitive applications or those requiring a guaranteed GBW parameter, careful validation is advised.