The ASAIR AHT15 sensor datasheet provides specifications, electrical characteristics, pinout, I2C communication details, and application guidelines.
The AHT15 is a fully calibrated digital humidity and temperature sensor with a compact package and PTFE‑protected housing for harsh environments. It offers a supply range of 1.8‑3.6 V (recommended 3.3 V) and operates from –40 °C to 80 °C with a humidity range of 0‑80 %RH.
The document includes performance tables, electrical characteristics, pin definitions, wiring recommendations, and detailed instructions for soldering, storage, recovery, and signal integrity. It also describes the I2C command set, timing diagrams, and packaging information for mass production. This manual is written in Chinese.
| Supply voltage (VDD) | 1.8‑3.6 V (recommended 3.3 V) |
|---|---|
| Humidity measurement range | 0‑80 %RH |
| Temperature measurement range | ‑40 °C to 80 °C |
| Interface | 2‑wire I2C digital interface |
| Package dimensions | 1.27 mm × 3.00 mm × 6.00 mm |
The sensor operates from 1.8 V to 3.6 V, with a recommended voltage of 3.3 V.
It measures humidity from 0 %RH up to 80 %RH (accuracy may drift above 80 %RH).
The AHT15 uses a standard two‑wire I2C (2‑IC) protocol for data exchange.