STMicroelectronics HTS221TR Humidity & Temperature Sensor, 0~100% RH, ±3.5% RH, ±0.5°C, I²C/SPI, 1.7~3.6V, LGA-6

Name: STMicroelectronics HTS221TR Humidity &amp; Temperature Sensor, 0~100% RH, ±3.5% RH, ±0.5°C, I²C/SPI, 1.7~3.6V, LGA-6
Brand: STMicroelectronics
SKU: SENS-3847
Price: 309.00 INR
Availability: OutOfStock

₹309.00 (Inclusive of all taxes)

Out of Stock

The STMicroelectronics HTS221TR is an ultra-compact digital humidity and temperature sensor with I²C and SPI interfaces, designed for integration into space-constrained applications like wearables, IoT devices, and portable instrumentation. It provides factory-calibrated 16-bit digital output for accurate environmental monitoring.

Features

Ultra-compact LGA-6 package (2×2×0.9 mm) for space-constrained designs.
Dual digital interface (I²C & SPI) for flexible microcontroller integration (Arduino, Raspberry Pi, STM32).
Factory calibrated with ±3.5% RH and ±0.5°C accuracy, eliminating user calibration.
Ultra-low power consumption (2 µA @ 1 Hz ODR) ideal for battery-powered devices.
Wide operating range: 0–100% RH and -40°C to +120°C.

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Description

The HTS221TR integrates a polymer dielectric capacitive humidity sensing element and a temperature sensor with a dedicated mixed-signal ASIC. This combination provides fully calibrated digital output via a 16-bit ADC, ensuring high signal integrity and stability for precise environmental monitoring. The sensor’s architecture minimizes drift and hysteresis, delivering reliable long-term performance.

Engineered for low-power operation, the HTS221TR features configurable output data rates (1, 7, 12.5 Hz) and a dedicated power-down mode, making it suitable for power-sensitive applications. Its robust LGA-6 housing ensures durability in challenging environments, supporting a wide supply voltage range from 1.7V to 3.6V for compatibility with modern 3.3V logic systems.

Key Features

High-accuracy capacitive humidity sensing with ±3.5% RH accuracy (20–80% RH).
Integrated temperature sensor with ±0.5°C accuracy (15–40°C).
Ultra-low power operation: 2 µA active current at 1 Hz output data rate.
Factory calibration data stored in embedded OTP memory for plug-and-play operation.
Dual-selectable digital serial interface (I²C up to 1 MHz, SPI up to 10 MHz).
Excellent long-term stability with low drift (0.5 %RH/year, 0.05 °C/year).
Fast response times: 10 seconds for humidity, 15 seconds for temperature.
High-value build in a miniature, surface-mount LGA-6 package.

Applications

Smart wearable devices and fitness trackers for environmental context sensing.
IoT sensor nodes and wireless environmental monitoring systems.
HVAC system control and indoor air quality monitoring units.
Portable data loggers and meteorological instrumentation.
Asset tracking and condition monitoring in logistics.

Technical Specifications

Manufacturer Part Number	HTS221TR
Brand	STMicroelectronics
Sensor Type	Humidity & Temperature
Humidity Range	0 to 100 %RH
Humidity Accuracy	±3.5% RH (20–80% RH), ±5% RH (full range)
Humidity Sensitivity	0.004 %RH/LSB
Temperature Range	-40°C to +120°C
Temperature Accuracy	±0.5°C (15–40°C)
Temperature Sensitivity	0.016 °C/LSB
Output Interface	I²C, SPI
ADC Resolution	16-bit
Output Data Rate	1 / 7 / 12.5 Hz
Supply Voltage	1.7V to 3.6V DC
Active Current	2 µA @ 1 Hz ODR
Power-down Current	0.5 µA
Humidity Response Time	10 s
Temperature Response Time	15 s
Humidity Drift	0.5 %RH/year
Temperature Drift	0.05 °C/year
Package Type	LGA-6
Package Dimensions	2.0 x 2.0 x 0.9 mm

Frequently Asked Questions

What is the supply voltage range for the HTS221TR sensor?

The HTS221TR operates from 1.7V to 3.6V DC, making it directly compatible with standard 3.3V logic systems and suitable for battery-powered applications. It features ultra-low power consumption, drawing only 2 µA at a 1 Hz output data rate.

Does the HTS221TR require user calibration?

No, the HTS221TR is factory calibrated. Individual calibration coefficients are stored in embedded OTP memory and are automatically applied by the internal ASIC, providing plug-and-play operation and simplifying system integration.

How do I communicate with the HTS221TR sensor?

The sensor features a dual digital interface, supporting both I²C (up to 1 MHz) and SPI (up to 10 MHz) protocols. The interface is selected via the CSB/SA0 pin. Standard Arduino, Raspberry Pi, and STM32 libraries are available for easy integration.

What is the accuracy and measurement range of the humidity sensor?

The humidity sensor covers 0 to 100% RH with an accuracy of ±3.5% RH within the 20–80% RH range (±5% RH over the full range). The integrated temperature sensor measures from -40°C to +120°C with ±0.5°C accuracy between 15–40°C.

Is the HTS221TR suitable for surface-mount assembly?

Yes, the HTS221TR comes in a compact, leadless LGA-6 package measuring 2.0 x 2.0 x 0.9 mm. It is designed for standard surface-mount technology (SMT) assembly processes, requiring appropriate PCB land pattern design and reflow soldering.