HTS221 Sensor: Datasheet, Pinout and Block Diagram

HTS221 Symbol

HTS221 Footprint

HTS221 3D Model

The HTS221 is a super-compact relative humidity and temperature sensor. It has a sensor element as well as a mixed-signal ASIC that provides measurement data via digital serial ports.

A polymer dielectric planar capacitor structure capable of detecting relative humidity variations makes up the sensor element, which is made via a special ST method.

 0 to 100% relative humidity range

 Supply voltage: 1.7 to 3.6 V

 Low power consumption: 2 μA @ 1 Hz ODR

 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 °C

 Embedded 16-bit ADC

 16-bit humidity and temperature output data

 SPI and I²C interfaces

 Factory calibrated

 Tiny 2 x 2 x 0.9 mm package

 ECOPACK® compliant

• Air conditioning, heating and ventilation

• Air humidifiers

• Refrigerators

• Wearable devices

• Smart home automation

• Industrial automation

• Respiratory equipment

• Asset and goods tracking

As the HTS221 electrical connection is shown above. The VDD line is used to power the gadget. The power supply decoupling capacitor (100 nF ceramic) should be installed as close to the device's supply pad as practicable (common design practice). Through the I2C/SPI interfaces, the device's functionality and measured data outputs can be selected and accessed. The CS line must be tied high (i.e. linked to VDD) or left unconnected to pick the I2C interface (thanks to the internal pull-up). To ensure optimal IC behaviour, all voltage and ground supplies must be present at the same time. 

STMicroelectronics is a globally recognized semiconductor company. They are dedicated to developing semiconductor solutions for various microelectronics applications. STMicroelectronics enjoys unrivalled silicon and system expertise, strong manufacturing strength, IP portfolio, and solid relationships with their strategic partners. Based on these advantages, STMicroelectronics has become a pioneer in System-on-Chip (SoC) technology and its products have a positive effect in realizing today's convergence trends.