AD5247BKSZ100-1RL7 Substitution Conclusion From a core parameter and functional perspective, the AD5247BKSZ100-1RL7 is a viable substitute for the original AD5246BKSZ100-RL7, with one key performance distinction to note. The two devices are highly aligned in critical specifications: both are 100kΩ linear, 128-tap, I²C-interfaced digital potentiometers, sharing the same package and operating voltage range. The difference lies in their typical contact resistance (Rwiper). The original part specifies 150Ω, while the substitute features a lower 75Ω. This reduction in contact resistance translates to lower on-state insertion loss and a smaller series error introduced into the signal path. Consequently, the substitute offers a potential improvement in overall system accuracy and linearity, particularly advantageous in low-impedance setting or precision voltage-divider applications. Given the functional compatibility, the AD5247BKSZ100-1RL7 is not only a direct drop-in replacement but may also deliver a performance benefit due to its superior contact resistance. However, it remains essential to validate in the final application whether this parameter difference impacts specific circuit characteristics, such as pole settings or signal integrity.