1. Substitution Conclusion for AD5247BKSZ10-2RL7 The AD5247BKSZ10-2RL7 cannot serve as a direct, drop-in replacement for the MCP4018T-503E/LT without circuit modifications. The key differences are as follows: Configuration: It is configured as a rheostat (two-terminal variable resistor) rather than a potentiometer. Consequently, it cannot directly implement the original three-terminal voltage divider function. Resistance Value: Its nominal resistance is 10 kΩ, not 50 kΩ. This will significantly alter the circuit's voltage division ratio and load effects, potentially causing signals or bias points to deviate from their designed values. Operating Voltage: Its minimum supply voltage is 2.7V, compared to 1.8V for the original. This restricts its use in low-voltage systems operating within the 1.8V to 2.7V range. While the AD5247BKSZ10-2RL7 offers advantages in terms of a lower temperature coefficient (45ppm/°C vs. 150ppm/°C) and a smaller wiper resistance (75Ω vs. 155Ω), which benefit thermal stability and power dissipation, the core differences outlined above render direct substitution unfeasible. A replacement would require a circuit redesign to accommodate these parameter changes.