1. AD8542ARUZ Substitution Conclusion From a functional and packaging perspective, the AD8542ARUZ can directly replace the AZV358GTR-G1, as both share identical supply voltage range (2.7V to 5.5V), rail-to-rail output, package (8-TSSOP), and pinout. The key technical substitution is not a "lossless upgrade" but a "conditional replacement." The AD8542 features an extremely low input bias current (4 pA), significantly better than the original part's 15 nA. This makes it excellent for applications requiring high input impedance, such as sensor interfaces and integrator circuits. Furthermore, its quiescent current (45 µA per channel) is notably lower, benefiting battery-powered devices. However, its output drive capability (30 mA) is only half that of the original part (60 mA). If the original circuit drives heavy loads (e.g., LEDs, small motors), direct substitution may lead to insufficient drive or degraded performance. For low-power, high-precision signal conditioning applications, the AD8542 is an excellent substitute, even an upgrade. For high-output-current scenarios, it is not suitable for direct replacement.