SHT40 in Sensirion SHT4x Family
The SHT40 sub-family by Sensirion represents the fourth-generation of digital relative humidity and temperature sensors. These sensors provide high-accuracy environmental monitoring with an I2C interface and ultra-low power consumption. Built on a refined CMOSens technology, the SHT40 is designed for high-volume production, offering a compact 4-pin DFN package and wide supply voltage range (1.08V to 3.6V). They are primarily used in battery-powered devices where footprint and energy efficiency are critical constraints.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | Accuracy | Package | Voltage | Stock |
|---|---|---|---|---|
| SHT40-AD1B-R2 (Sensirion AG) | +/-1.8% RH | WDFN-4 | 1.08V | 25,490 |
| SHT40-AD1B-R3 (Sensirion AG) | +/-1.8% RH | WDFN-4 | 1.08V | 27,321 |
| SHT40-BD1B-R3 (Sensirion AG) | +/-1.8% RH | UDFN-4 | 1.08V | 11,300 |
| SHT40-AD1F-R2 (Sensirion AG) | +/-1.8% RH | WDFN-4 | 1.08V | 12,260 |
| SHT40I-HD1B-R2 (Sensirion AG) | +/-2.5% RH | WDFN-4 | 4.5V | 868 |
Variants within the SHT40 sub-family primarily differ by their qualification standards and physical protection. The 'A' suffix denotes automotive-grade qualification (AEC-Q100), while the 'I' suffix indicates industrial-grade performance. Packaging options also vary between the standard open-cavity DFN and versions featuring a patented PTFE membrane (F-suffix) for IP67 protection against dust and water during assembly and field operation. Tape and reel quantities are distinguished by the R2 or R3 suffixes.
