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Datasheet Humidity and Temperature Sensors SHT1x (RH&T)

Datasheet Humidity and Temperature Sensors SHT1x (RH&T)

Product catalog summary

Overview: The SHT1x series, including models SHT10, SHT11, and SHT15, are humidity and temperature sensor ICs by Sensirion. These sensors are fully calibrated, offer digital output, and are known for low power consumption and long-term stability. They are suitable for surface mounting and reflow soldering.

Specifications: These sensors feature a version 4 silicon chip with integrated humidity and temperature sensors, an amplifier, A/D converter, OTP memory, and a digital interface. They comply with RoHS and WEEE standards, being free from hazardous substances like Pb, Cd, and Hg.

Performance:

Humidity: 12-bit resolution with accuracy varying by model: SHT10 (±4.5% RH), SHT11 (±3.0% RH), and SHT15 (±2.0% RH). Operating range is 0-100% RH, with an 8-second response time.
Temperature: 14-bit resolution with accuracy: SHT10 (±0.5°C), SHT11 (±0.4°C), and SHT15 (±0.3°C). Operating range is -40 to 123.8°C, with a response time of 5-30 seconds.

Electrical Characteristics: Operates at 2.4 to 5.5 V with typical power consumption of 90 µW. Utilizes a digital 2-wire interface for communication.

Packaging and Handling: Available in tape and reel packaging. Requires careful handling to avoid exposure to chemical vapors. Recommended storage conditions are 10-50°C and 20-60% RH.

Application Information:

Operating Conditions: Maintain within normal range for stability. High humidity (>80% RH) can temporarily offset readings.
Soldering Instructions: Withstands reflow soldering up to 260°C. Post-soldering storage at >75% RH is recommended for rehydration.
Reconditioning Procedure: Bake at 100-105°C and rehydrate at 75% RH to restore calibration after extreme conditions.

Interface Specifications: Uses a 4-pin interface: GND, DATA, SCK, and VDD. Requires a 100 nF capacitor for power supply decoupling and a pull-up resistor for the DATA line.

Additional Considerations: Not light-sensitive but prolonged UV exposure may age the housing. Can be fitted with a membrane for protection against dirt and droplets.

Electrical Characteristics: Operates with a power supply range of 2.4V to 5.5V, recommended at 3.3V for highest accuracy. Supply current varies by mode: measuring (0.55-1 mA), average (2-28 µA), and sleep (0.3-1.5 µA).

Communication with Sensor: Requires a specific startup sequence with an 11ms power-up time. Commands are sent using a Transmission Start sequence, with the sensor acknowledging by pulling the DATA pin low.

Measurement and Data Handling: Provides two bytes of measurement data and an optional CRC checksum. Sensor should not be active for more than 10% of the time to avoid self-heating.

Status Register and Advanced Functions: Allows configuration of measurement resolution, battery status detection, and heater activation. The heater can increase sensor temperature by 5-10°C.

Signal Output Conversion: Humidity readings require conversion for non-linearity compensation. Dew point can be calculated using provided formulas.

Environmental Stability and Testing: Tested according to AEC-Q100 standards. Packaged in a surface-mountable LCC type package, compliant with RoHS and WEEE standards.

Device Specifications: Measures 7.47 x 4.93 x 2.5 mm and weighs 100 mg. Marked with a three-digit alphanumeric code for traceability.

Traceability and Packaging: Each sensor is traceable through production, calibration, and testing. Shipped in 12mm tape with quantities of 100, 400, or 2000 units per reel.

Shipping and Handling: Sensitive to electrostatic discharge (ESD), requiring precautions to prevent damage.

Warranty and Liability: 12-month warranty from delivery date, covering defects in quality, material, and workmanship. Warranty void if not used according to specifications.

Important Notices: Not to be used as a safety or emergency stop device. Sensirion disclaims all warranties except those expressly stated.

Contact Information: Sensirion's headquarters are in Switzerland, with subsidiaries in the USA, Japan, Korea, China, and Germany.

Catalog excerpts

Datasheet Humidity and Temperature Sensors SHT1x (RH&T)-11

Datasheet SHTIx SENSIRION Revision History Date Version Page(s) Changes July 2008 4.0 1 - 11 New release, rework of datasheet September 2008 4.1 3, 4 Adjustment of normal operating range and recommendation for antistatic bag April 2009 4.2 2, 7 Amended foot note 2, communication diagram updated (Figure 17). May 2010 4.3 1 - 11 Various errors corrected and additional information given (ask for change protocol). December 2011 5 1, 8, 9 Reference to V3 sensors eliminated. www.sensirion.com Version 5 - December 2011 11/12

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Datasheet Humidity and Temperature Sensors SHT1x (RH&T)

Datasheet Humidity and Temperature Sensors SHT1x (RH&T)

Catalog excerpts

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