1. AD5247BKSZ10-2RL7 Substitution Conclusion Direct substitution is not recommended; a circuit design re-evaluation is required. The AD5247 differs from the original part in two critical parameters. First, its nominal resistance is 10 kΩ, which is only one-fifth of the original 50 kΩ. Under the same voltage, the current through the potentiometer will increase fivefold. This will significantly alter the circuit's voltage division ratio, power dissipation, and output impedance, potentially causing circuit malfunction or performance deviation from the design target. Second, its minimum operating voltage is 2.7V, higher than the original's 1.8V. This renders it inoperable within the 1.8V to 2.7V low-voltage range, limiting its use in ultra-low-power or low-voltage systems. Although its wiper resistance (75Ω) and temperature coefficient (45 ppm/°C) are superior to the original part, these advantages cannot compensate for the fundamental mismatches in resistance value and voltage range.