Original Part
Alternative Part
1. LMV321M7X Substitution Conclusion
The LMV321M7X can serve as a direct replacement for the LMV321SQ3T2G. Both devices are fully aligned in core electrical parameters—supply voltage, gain bandwidth product, slew rate, quiescent current, and output drive capability—as well as in physical package (SC-70-5), ensuring fundamental functional compatibility. The sole technical deviation lies in the input bias current (Ib): the TI LMV321M7X specifies 15nA, while the original On Semiconductor part is rated at 1nA, a factor of 15 difference. In applications where the circuit is highly sensitive to input bias current—such as precision integrators or photodiode transimpedance amplifiers employing high-value feedback or input resistors—the LMV321M7X may introduce greater input offset error and DC error. For the vast majority of common applications, including general-purpose amplification, voltage following, and low-impedance signal conditioning, this discrepancy typically does not impair circuit functionality, making the substitution viable.
2. LMV321M7 Substitution Conclusion
The LMV321M7 can also be used as a direct replacement for the LMV321SQ3T2G. The evaluation conclusion is identical to that for the LMV321M7X, as both are the same TI part number (the “X” suffix generally denotes only reel packaging variation, with no difference in the die itself). It matches the original device in package and in most key parameters. Again, the difference remains the input bias current (15nA vs. 1nA). This deviation indicates that substitution may degrade performance in precision applications demanding extremely low input current. However, for a broad range of general-purpose designs where DC precision is not critical, the LMV321M7 represents a qualified alternative, given its pin compatibility and consistency in core parameters.
Analysis ID: 7833-C33E000
Based on part parameters and for reference only. Not to be used for procurement or production.
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