Original Part
Alternative Part
1. LM2904ADMR2G Substitution Conclusion
The LM2904ADMR2G can generally serve as a replacement for the LM358AST in standard industrial applications, but with critical limitations that make it unsuitable for stringent automotive or high-precision scenarios. The key differences are as follows: First, its maximum supply voltage is 26 V, lower than the original part’s 30 V, preventing direct substitution in circuits operating near 30 V. Second, its input offset voltage (2 mV) and input bias current (45 nA) are both inferior to those of the original part (1 mV, 20 nA), which will degrade the accuracy of DC amplification circuits and increase error. Finally, and most importantly, it lacks the AEC‑Q100 automotive qualification of the original part, and therefore must not be used in automotive or any other applications requiring reliability grading. Its gain bandwidth product (1 MHz) and package (8‑MSOP) remain compatible with the original part.
2. LM2904VDMR2G Substitution Conclusion
The LM2904VDMR2G is not suitable as a general‑purpose substitute for the LM358AST. It may only be considered in specific applications where precision and power consumption are extremely non‑critical, but a higher supply voltage is required. Its most notable drawbacks are the very high input offset voltage (7 mV) and nearly doubled quiescent current (1.5 mA per channel). When used as a DC amplifier, it will introduce substantial error, while overall power dissipation and temperature rise will increase significantly. Although its maximum supply voltage (32 V) exceeds that of the original part (30 V)—a potential advantage—its poor DC accuracy and high power consumption prevent it from meeting the basic performance requirements of typical LM358AST applications. Like the ADMR2G, it also lacks automotive qualification.
Analysis ID: CEC1-C947000
Based on part parameters and for reference only. Not to be used for procurement or production.
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