MAX412CSA+ Substitution Conclusion The MAX412CSA+ demonstrates low feasibility as a drop-in replacement for the original current-feedback amplifier AD8072JRZ, primarily due to significant gaps in critical high-speed performance metrics. With a gain-bandwidth product of only 28 MHz, the MAX412CSA+ falls far short of the AD8072JRZ's 100 MHz -3dB bandwidth. In video or high-speed signal processing applications, this makes it incapable of maintaining the original part's wideband frequency response, potentially leading to signal distortion or attenuation. Furthermore, its slew rate of 4.5 V/µs is two orders of magnitude lower than the AD8072JRZ's 500 V/µs, severely limiting its ability to handle fast transient signals and introducing distortion in high-frequency or large-signal-swing scenarios. On the power supply front, the MAX412CSA+ operates from a single supply of 4.8 V to 10.5 V, whereas the AD8072JRZ supports a wider single-supply range (5 V to 12 V) or dual supplies (±2.5 V to 6 V). This discrepancy can create supply compatibility issues, especially in designs requiring dual-rail operation. While it shares the same package and offers a slightly higher output current (35 mA vs. 30 mA), these advantages do not offset the substantial deficiencies in bandwidth and slew rate. Consequently, the MAX412CSA+ is suitable only for low-frequency, general-purpose amplification where speed is not critical and cannot directly replace the original part's function in high-speed video applications. MAX4225ESA+ Substitution Conclusion The MAX4225ESA+ presents a high feasibility as a same-type (current-feedback) replacement for the AD8072JRZ, though the performance improvements come with certain trade-offs that require attention. Its -3dB bandwidth of 1 GHz vastly exceeds the original part's 100 MHz, enabling support for wider signal bandwidths in ultra-high-speed video or RF applications. With a slew rate of 1100 V/µs—more than double that of the AD8072JRZ—it can respond to signal changes more rapidly, reducing distortion. The MAX4225ESA+ also offers enhanced drive capability with an output current of 80 mA per channel compared to the original 30 mA. However, its supply current is 6 mA per channel (12 mA total), significantly higher than the AD8072JRZ's 3.5 mA, which increases system power dissipation and thermal design burden. Its supply voltage range is 5.7 V to 11 V (single supply), whereas the AD8072JRZ supports the more flexible 5 V to 12 V single-supply or ±2.5 V to 6 V dual-supply configurations. This could limit its use in certain dual-supply architectures. The shared package facilitates physical replacement. In summary, the MAX4225ESA+ offers superior speed and bandwidth, making it suitable for performance upgrades in high-end systems. A thorough evaluation of supply compatibility and power consumption impact is necessary to ensure viability within the existing design constraints.