Original Part
Alternative Part
1. LM358DGKR Substitution Conclusion
From the perspective of key parameters and package, the LM358DGKR is a highly viable substitute for the LM2904ADMR2G, particularly in power-sensitive applications. The differences are as follows: its gain bandwidth product (800 kHz) is slightly lower than that of the original part (1 MHz), resulting in a somewhat narrower usable bandwidth under the same closed-loop gain, though this has minimal impact for most general-purpose low-frequency applications; its input offset voltage (3 mV) is slightly higher than the original's (2 mV), which may introduce marginally larger errors in applications requiring high-precision DC amplification; its primary advantage is a significantly lower quiescent current (500µA per channel) compared to the original (800µA per channel), leading to lower power consumption and extended battery life. Furthermore, it offers a wider upper supply voltage range (30 V). The package is fully compatible.
2. LM258PT Substitution Conclusion
The LM258PT can serve as an electrical substitute for the LM2904ADMR2G, but its package is not directly compatible, and its DC precision is somewhat inferior. It is better suited for scenarios with stringent requirements for reliability and operating temperature range. Key differences include: its gain bandwidth product (1.1 MHz) is comparable to the original part (1 MHz); however, its input offset voltage (5 mV) is significantly higher than the original's (2 mV)—the acceptability of this error must be evaluated in precision DC applications; its quiescent current (700µA per channel) falls between the two. The most critical advantage is its AEC-Q100 automotive-grade qualification, making it more suitable for automotive or harsh industrial environments in terms of temperature range, reliability, and consistency. Its package is an 8-TSSOP with a width of 4.40mm, which is wider than the original part's 3.00mm wide 8-MSOP package, necessitating a redesign of the PCB layout.
Analysis ID: 5F2A-4A61000
Based on part parameters and for reference only. Not to be used for procurement or production.
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