1. OP07CSZ Substitution Conclusion The OP07CSZ can directly replace the original OP-07DPSR, as their key specifications are highly consistent: both share the same input offset voltage (60 µV), slew rate (0.3 V/µs), bandwidth (600 kHz), and supply voltage range (6 V to 36 V). Differences lie in the package outline (OP07CSZ uses a narrow-body 8-SOIC, while the original part is a wide-body 8-SO) and input bias current (OP07CSZ is 1.8 nA, slightly better than the original’s 2 nA). PCB layout must be adapted for the package change, but electrical performance remains fully compatible. The minor improvement in bias current has negligible impact in most applications and may even reduce DC error. Provided that the package footprint can be modified, the OP07CSZ is considered a reliable substitute.