1. TL072CD Substitution Conclusion Care must be taken when substituting the TL072CD for the TL3472CD. Key differences include: a narrower supply voltage range (10V to 30V vs. 4V to 36V). Substitution is not viable if the original design operates outside the 10V-30V range. The TL072CD features a significantly lower input bias current (65 pA vs. 100 nA), which benefits high-impedance signal source applications but may alter the circuit's bias point. Its input offset voltage is higher (3 mV vs. 1 mV), potentially degrading DC accuracy. The gain-bandwidth product is slightly higher (5.25 MHz vs. 4 MHz), and the slew rate is identical (13 V/µs), resulting in comparable or marginally better bandwidth performance. The supply current is lower (1.4 mA/ch vs. 3.5 mA/ch), reducing power consumption. However, its output current is not explicitly specified (inferred to be similar to the TL082CD's 10 mA) and is substantially lower than the TL3472CD's 34 mA, which may preclude driving low-impedance loads. In summary, for applications within the 10V-30V supply range, with modest output current requirements and tolerance for higher offset voltage, the TL072CD can serve as a low-power, high-input-impedance alternative, but circuit stability and precision must be re-evaluated.