What is the thermal response time of a digital temperature sensor?
The thermal response of a digital temperature sensor is a function of the thermal mass of the sensor, but is heavily influenced by the mass of the object on which the IC is mounted. For example, a large PCB acts as a large heat sink and slows the thermal response. For best thermal response, it is recommended to mount the sensor on as small a PCB as possible, such as a flex PCB that provides the best thermal response.
ADI has achieved thermal responses < 2 seconds (including all signal processing) for digital temperature sensors such as ADT7320 and ADT7420 mounted onto a flex PCB.