1. AD8634HRZN Substitution Conclusion The AD8634HRZN can generally replace the LT1498MPS8TRPBF in most common applications, but key differences must be considered: The input bias current of the AD8634 (45 nA) is significantly lower than that of the original part (250 nA), which is advantageous for high-impedance signal source applications. Its output current (65 mA) is higher, offering better capacitive load drive capability. However, its supply voltage range (3–30 V) is narrower than that of the original device (2.2–36 V), limiting its use in ultra-low-voltage or higher-voltage scenarios. Additionally, the AD8634 has slightly lower bandwidth (9.7 MHz) and slew rate (4.9 V/µs), which may make it unsuitable for systems with demanding high-frequency or fast transient response requirements. On the other hand, its lower power consumption (1.1 mA per channel) contributes to energy efficiency. If the application does not require an ultra-wide supply range and places higher emphasis on precision and drive capability, the AD8634 can serve as a high-performance alternative.