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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
- 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
Sample & Buy
| Part Number | Marketing Status | Quantity | Budgetary Price (US$)* | Package | Packing Type | Temperature (°C) | ECCN (US) | Country of Origin | More info | Order from Distributors | Order from ST | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| HTS221TR |
Active
|
1000 | 1.4 | HLGA-6L 2X2X0.9 | Tape And Reel | -40 | 120 | EAR99 | - | Check Availability | Get sample | |
(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors
Ecosystems
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Picture Part number Manufacturer Description AWS IoT Core AWS AWS IoT Core is a managed cloud platform that lets connected devices easily and securely interact with cloud applications and other devices. AZURE Cloud Microsoft Microsoft Azure is an ever-expanding set of cloud services to help your organization meet your business challenges. It's the freedom to build, manage, and deploy applications on a massive, global network using your favorite tools and frameworks. Watson IoT Platform IBM IBM Watson IoT Platform is a managed, cloud-hosted service designed to make it simple to derive value from your Internet of Things devices. Part NumberAWS IoT Core is a managed cloud platform that lets connected devices easily and securely interact with cloud applications and other devices.
Microsoft Azure is an ever-expanding set of cloud services to help your organization meet your business challenges. It's the freedom to build, manage, and deploy applications on a massive, global network using your favorite tools and frameworks.
IBM Watson IoT Platform is a managed, cloud-hosted service designed to make it simple to derive value from your Internet of Things devices.
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Picture Part number Manufacturer Description SensiBLE SensiEDGE Ready-to-use BLE System-on-Module packed with sensors, low power ARM® 32-bit Cortex®-M4 CPU and coin battery. Speed up IoT product development today! SensiSUB SensiEDGE Connecting low-power SUB 1GHZ RF transceiver to the Cloud with fully customisable sensors, ARM® 32-bit Cortex®-M4 CPU and coin battery. Temp&Hum click MikroElektronika Temp&Hum click carries ST's HTS221 temperature and relative humidity sensor. Its temperature measurement accuracy is ±1°C within a 0-60°C range. Part NumberReady-to-use BLE System-on-Module packed with sensors, low power ARM® 32-bit Cortex®-M4 CPU and coin battery. Speed up IoT product development today!
Connecting low-power SUB 1GHZ RF transceiver to the Cloud with fully customisable sensors, ARM® 32-bit Cortex®-M4 CPU and coin battery.
Temp&Hum click carries ST's HTS221 temperature and relative humidity sensor. Its temperature measurement accuracy is ±1°C within a 0-60°C range.
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Embedded Software
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Evaluation Tools
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STEVAL-MKI141V2 -- HTS221 humidity sensor adapter board for standard DIL24 socket (full pinout) 
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STREF-MKI128V6 -- Smart MEMS Multi-sensor module Part NumberHTS221 humidity sensor adapter board for standard DIL24 socket (full pinout)
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ArgonKey mezzanine board based on different ST sensors
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Support and Applications
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Picture Part number Manufacturer Description SensiEDGE customization services SensiEDGE End-to-end development services: Hardware, Firmware, Software development, Enclosure, Cloud and mobile APPs. Speed up your IoT project with SensiEDGE! Part NumberEnd-to-end development services: Hardware, Firmware, Software development, Enclosure, Cloud and mobile APPs. Speed up your IoT project with SensiEDGE!
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| Part Number | Marketing Status | Package | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|
| HTS221TR |
Active
|
HLGA-6L 2X2X0.9 | Ecopack2 |
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HTS221TR
Package:
HLGA-6L 2X2X0.9Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
