1. AZV321KSTR-G1 Substitution Conclusion The AZV321KSTR-G1 can functionally replace the LMV321M7X in terms of key specifications. However, its significantly higher input bias current (250 nA vs. 15 nA) represents a critical performance downgrade. In applications involving high-output-impedance signal sources—such as photodiodes or high-value resistive divider networks—or in precision circuits sensitive to input current errors, a direct substitution may degrade DC accuracy and increase offset errors. For general-purpose applications like signal buffering, low-side comparison, or driving typical loads where supply voltage, bandwidth, output drive capability, and package pinout are identical, this device serves as a compatible alternative.