AST Humidity Sensor, HTU20D(F)
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HTU21D/A

Series: HTU20D(F) Humidity Sensor Brand: American Sensor Technologies Inc
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AST Humidity Sensor, HTU20D(F)
  • Accuracy - ± 3% RH Maximum Tolerance at 55% RH
  • Output - Digital, I²C Protocol
  • Filter - Without Embedded PTFE Filter / Membrane

Specifications

Brand

Accuracy

  • ± 0.3° C (± 0.54° F) - Temperature Accuracy at 25° C (77° F)
  • ± 3 % RH Typical - Relative Humidity Accuracy at 25° C (77° F) (20 to 80 % RH)

Approvals & Certifications

  • RoHS

Communication

  • Digital 2-Wire Interface
  • I²C Protocol

Current

  • -10 to 10 mA - Input Current on Any Pin
  • 300-500 µA - (450 µA Typical) Measuring, Vdd = 3 V, SCK= 400 kHz at 25° C (77° F) - Current Consumption
  • Sleep Mode: 0.02 µA Typical, Vdd = 3 V, SCK= 400 kHz at 25° C (77° F) - Current Consumption
  • Sleep Mode: 0.14 µA, Max.

Dissipation

  • 0.06 µW Typical - Sleep Mode
  • 0.5 µW, Max.
  • 2.7 µW Typical - Average 8-bit, Vdd = 3 V, SCK= 400 kHz, Temp< 60° C (140° F), Duty Cycle < 10 %

Environmental Protection

  • IP67

Frequency

  • 0 to 0.4 MHz - SCK Frequency

Humidity

  • 0 to 100 % RH

Hysteresis

  • ± 1 % RH Typical - Humidity Hysteresis

Load

  • 0 to 500 PF - Capacitive Load on Bus Line

Measuring Time

  • Relative Humidity: 14 ms Typical, 16 ms, max.
  • Relative Humidity: 2 ms Typical, 3 ms, max.
  • Relative Humidity: 4 ms Typical, 5 ms, max.
  • Relative Humidity: 7 ms Typical, 8 ms, max.
  • Temperature: 11 ms Typical, 13 ms, max.
  • Temperature: 22 ms Typical, 25 ms, max.
  • Temperature: 44 ms Typical, 50 ms, max.
  • Temperature: 6 ms Typical, 7 ms, max.

Operating Temperature

  • -40° to 125° C (-40° to 257° F)

Recovery Time

  • 0.6 µs Min. - SCK High Time
  • 1.3 µs Min. - SCK Low Time
  • 100 Nanoseconds Min. - DATA Set-Up Time
  • 100 Nanoseconds, Max.
  • 300 Nanoseconds, Max.
  • 400 Nanoseconds, Max.
  • 900 Nanoseconds, Max.
  • Relative Humidity: 10 seconds Typical after 150 Hours of Condensation

Resolution

  • 0.01° C Typical - for 14-bit
  • 0.04 % RH Typical - for 12-bit
  • 0.04° C Typical - for 12-bit
  • 0.7 % RH Typical - for 8-bit

Response Time

  • Relative Humidity: 5 seconds Typical, 10 seconds, Max.
  • Temperature: 10 seconds Typical (At 63 % of Signal) from 15° to 45° C (59° to 113° F) at 1 m/sec Air Flow

Storage Temperature

  • -40° to 125° C (-40° to 257° F)

Supply Voltage

  • -0.3 to 3.6 V - Vdd to GND
  • -0.3 to Vdd +0.3 V - Digital I/O Pins (DATA/SCK) to Vdd
  • 0 to 0.4 V - Low Level Output Voltage
  • 1.5-3.6 V
  • 3 V - Typical
  • 3.8 Vdc - Peak
  • 70 % Vdd - High Level Output Voltage, High Level Input Voltage

Temperature Effect

  • -0.15 % RH/°C - Temperature Coefficient from 0° to 80° C (32° to 176° F)

Thermal Drift

  • 0.04° C/Year - Long Term Drift
  • 0.5 % RH/Year - Long Term Drift

Documentation

Data Sheets

View Product Series

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