1. Substitution Conclusion for AD5247BKSZ10-RL7 Direct substitution is feasible under specific conditions, but key differences must be noted. This part is functionally identical to the original device in core specifications: 10kΩ resistance, 128 taps, I²C interface, and package. The primary deviations are as follows: Configuration (Rheostat vs. Potentiometer): It operates only as a two-terminal variable resistor (rheostat). It cannot directly replace the original if the circuit utilizes the three-terminal voltage divider (potentiometer) mode. Operating Voltage Range (2.7V to 5.5V vs. 1.8V to 5.5V): It is unsuitable for low-voltage systems operating between 1.8V and 2.7V. Performance Advantages: It features a superior temperature coefficient (45 ppm/°C vs. 150 ppm/°C) and a lower wiper resistance (75Ω vs. 155Ω). The former provides better temperature stability, while the latter minimizes errors introduced by series resistance. If the application circuit operates above 2.7V and uses the device strictly as a two-terminal variable resistor, a direct substitution is viable and may yield improved performance.