SHT21 Digital Humidity Temperature Sensors

Features:

• Fully Calibrated: Provides accurate and reliable measurement data.
• Digital Output: Utilizes I²C interface for easy integration with microcontrollers and other digital devices. Analog output mode (PWM) available upon request.
• Low Power Consumption: Operates at less than 3μW in normal mode, with further reduction possible by extending measurement intervals.
• Excellent Long-Term Stability: Encapsulation molding process enhances resistance to aging and environmental factors.
• Automotive-Grade Reliability: Complies with AEC-Q100 automotive industry standard.

Technical Parameters:

Electrical Specifications:

• Supply Voltage: 2.1 - 3.6V
• Supply Current:
• Sleep Mode: 0.15 - 0.4μA
• Measurement: 200 - 330μA
• Average Power Consumption (8-bit, 1 measurement/sec): 3.2μW

Measurement Performance:

• Humidity Range: 0 - 100%RH
• Temperature Range: -40 - 125°C
• Humidity Accuracy: ±2%RH (typical, 20 - 80%RH)
• Temperature Accuracy: ±0.3°C (typical, 25 - 42°C)
• Humidity Resolution:
  • 12-bit: 0.04%RH
  • 8-bit: 0.7%RH
• Temperature Resolution:
  • 14-bit: 0.01°C
  • 12-bit: 0.04°C
• Response Time:
  • Humidity: 8s (τ63%)
  • Temperature: 5 - 30s (τ63%)

Physical Characteristics:

• Package: DFN (Dual Flat No-Lead), 3x3x1.1mm³, reflow-solderable, tape-and-reel packaging for automated production.

Communication Protocol:

• Digital 2-Wire Interface: Fully compatible with I²C protocol.
• I²C Address: Fixed address for communication.
• Command Set: Includes measurement triggers, resolution configuration, and soft reset.
• Data Integrity: CRC checksum for error detection.

Application Fields:

• Consumer Electronics:
  • Air conditioners, humidifiers, air purifiers for indoor climate control.
• Automotive Electronics:
  • In-vehicle environmental monitoring and HVAC system optimization.
• Industrial Control:
  • Precise temperature and humidity monitoring in manufacturing processes.
• Meteorological Monitoring:
  • Weather stations and environmental sensors for atmospheric data collection.

Ordering Information:

• Package Options:
  • Tape and reel packaging (1,500 or 5,000 units per reel).
• Compliance:
  • RoHS, REACH, and AEC-Q100 certified.

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