TSV621AICT Substitution Conclusion Based on package, architecture, and key performance parameters, the TSV621AICT can be considered a potential substitute for the AD8613AKSZ-R2. However, the impact of its input accuracy differences must be evaluated for the specific application. Both are single-channel, rail-to-rail operational amplifiers in an SC70-5 package. The TSV621AICT offers slight advantages in power consumption (29µA quiescent current vs. 38µA) and supply voltage range (1.5V-5.5V vs. 1.8V-5V), while bandwidth and slew rate are comparable. The primary trade-offs are in input characteristics. The TSV621AICT's input bias current (1 pA) is 5 times higher, and its input offset voltage (800 µV) is double that of the original part. In applications involving high-impedance signal sources or requiring high-precision DC amplification—such as sensor pre-amplification or precision integrator circuits—this substitution could lead to increased DC error or degraded noise performance. Therefore, substitution is viable in applications where input precision is not critical and the focus is on low power consumption and a wide supply range. Conversely, for precision measurement scenarios, careful validation is required.