This technical note provides a high-level reference to guide the user in replacing the HTS221 humidity sensor with sensors from the SHT4x family from Sensirion and outlines important differences to be considered in the design-in processes.
This technical note provides a high-level reference for replacing the HTS221 humidity sensor with sensors from the SHT4x family. It outlines key differences in dimensions, pin assignment, supply voltage, accuracy, and response time to assist designers during the design-in process.
The document details specific features of the SHT4x, such as its built-in heater for self-decontamination and creep compensation, and compares electrical and timing specifications against the HTS221. It also covers package design differences, including the shift from a 6-pin HLGA to a 4-pin DFN package, and confirms communication compatibility via I²C.
| Supply voltage (V) | 1.08 – 3.6 V |
|---|---|
| Response time τ 63% (s) | 4 s |
The I²C address for the SHT4x is 0x44.
Yes, the qualification of the SHT4x is RoHS, REACH, and WEEE compliant.