The op-amp market spans from a 30-cent LM358 to a 15-euro precision zero-drift amplifier. The difference is not just the price tag. It is input offset voltage, noise density, GBW, slew rate, supply range and whether the output swings close enough to the rail. Pick the wrong one and your signal chain loses bits, clips prematurely or oscillates.
You have a temperature sensor, an EEPROM and an accelerometer to connect to your microcontroller. Do you wire them all to one I2C bus or give each its own SPI chip-select line? The choice shapes your pin budget, PCB routing, throughput and how many hours you spend debugging bus lockups. Here is the decision framework.