STMicroelectronics HTS221

The HTS221 is an ultra-compact sensor for relative humidity and temperature. It includes a sensing element and a mixed signal ASIC to provide the measurement information through digital serial interfaces. The sensing element consists of a polymer dielectric planar capacitor structure capable of detecting relative humidity variations and is manufactured using a dedicated ST process.

The HTS221 is available in a small top-holed cap land grid array (HLGA) package guaranteed to operate over a temperature range from -40 °C to +120 °C.

Key features

• 0 to 100% relative humidity range
• Supply voltage: 1.7 to 3.6 V
• Low power consumption: 2 μA @ 1 Hz ODR
• Embedded 16-bit ADC

Additional features

• Selectable ODR from 1 Hz to 12.5 Hz
• High rH sensitivity: 0.004% rH/LSB
• Humidity accuracy: ± 3.5% rH, 20 to +80% rH
• Temperature accuracy: ± 0.5 °C,15 to +40 °C16-bit humidity and temperature output data
• SPI and I²C interfaces
• Factory calibrated
• Tiny 2 x 2 x 0.9 mm package
• ECOPACK^® compliant

Applications

• Air conditioning, heating and ventilation
• Air humidifiers
• Refrigerators
• Wearable devices
• Smart home automation
• Industrial automation