Thermal drift is the change in the normal operation of an op-amp due to a change in the external temperature. The gain, impedances (input and output), frequency response, and voltages of the op-amp change with temperature.
Operational amplifiers are electronic devices made using semiconductor components (e.g., transistors). As the properties of semiconductors strongly depend on temperature, any change in the external ambient temperature also influences the operational behavior of devices manufactured using them. Read more