1. AD5247BKSZ10-2RL7 Substitution Conclusion Direct substitution is not feasible, requiring a re-evaluation of the circuit design. The core differences between this part and the original are the nominal resistance (10kΩ vs. 100kΩ) and the minimum operating voltage (2.7V vs. 1.8V). A one-order-of-magnitude difference in resistance will directly alter its role in voltage division ratios, time constants, or gain settings within the circuit, potentially causing circuit failure or significant performance deviation from specifications. Furthermore, its higher minimum operating voltage renders it inoperable within the 1.8V to 2.7V low-voltage range, limiting its applicability in ultra-low-power or single-cell battery-powered scenarios. Although its temperature coefficient (45ppm/°C) is significantly better than the original's (150ppm/°C), offering greater resistance stability over temperature, the mismatch in the two aforementioned key parameters remains the decisive limiting factor.