HTU21D(F) Humidity Sensor
Brand: American Sensor Technologies Inc
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HTU21D(F) Humidity Sensor
Brand: American Sensor Technologies IncThe HTU21D(F) is a new digital humidity sensor with temperature output by MEAS.
Setting new standards in terms of size and intelligence, it is embedded in a reflow solderable Dual Flat No leads (DFN) package with a small 3 x 3 x 0.9 mm footprint. This sensor provides calibrated, linearized signals in digital, I²C format.
HTU21D(F) digital humidity sensors are dedicated humidity and temperature plug and play transducers for OEM applications where reliable and accurate measurements are needed.
Direct interface with a micro-controller is made possible with the module for humidity and temperature digital outputs. These low power sensors are designed for high volume and cost sensitive applications with tight space constraints.
Features- Full Interchangeability with No Calibration Required in Standard Conditions
- Instantaneous Desaturation after Long Periods in Saturation Phase
- Compatible with Automatized Assembly Processes, Including Pb Free and Reflow Processes
- Individual Marking for Compliance to Stringent Traceability Requirements
Specifications
Accuracy
- ± 0.3° C (± 0.54° F) Typical - Temperature Accuracy at 25° C
Approvals & Certifications
- RoHS
Communication
- Digital 2-Wire Interface
- I²C Protocol
Current
- 0.02 µA Typical, Vdd 3 V, SCK 400 kHz at 25° C (77° F) - Current Consumption at Sleep Mode
- 0.14 µA, Max.
- -10 to 10 mA - Input Current on Any Pin
- 300-500 µA Vdd = 3 V, SCK= 400 kHz at 25° C (77° F) - Current Consumption at Measuring
Dissipation
- 0.06 µW Typical - Power Dissipation at Sleep Mode
- 0.5 µW, Max.
- 2.7 µW Typical, Vdd = 3 V, SCK= 400 kHz, Temp< 60° C (140° F), Duty Cycle < 10 % - Power Dissipation at Average 8-bit
Environmental Protection
- IP67
Frequency
- 0 to 0.4 MHz - SCK Frequency
Humidity
- ± 2 % Relative Humidity Typical - Relative Humidity Accuracy at 25° C (77° F) (20 to 80 % Relative Humidity)
- 0 to 100 % Relative Humidity
Hysteresis
- ± 1 % Relative Humidity Typical - Humidity Hysteresis
Load
- 0 to 500 PF - Capacitive Load on Bus Line
Measuring Time
- Relative Humidity: 14 milliseconds Typical, 16 milliseconds, Max.
- Relative Humidity: 2 milliseconds Typical, 3 milliseconds, Max.
- Relative Humidity: 4 milliseconds Typical, 5 milliseconds, Max.
- Relative Humidity: 7 milliseconds Typical, 8 milliseconds, Max.
- Temperature: 11 milliseconds Typical, 13 milliseconds, Max.
- Temperature: 22 milliseconds Typical, 25 milliseconds, Max.
- Temperature: 44 milliseconds Typical, 50 milliseconds, Max.
- Temperature: 6 milliseconds Typical, 7 milliseconds, 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 - 14-bit
- 0.04 % Relative Humidity Typical - 12-bits
- 0.04° C Typical - 12-bit
- 0.7 % Relative Humidity Typical - 8-bits
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 Ground
- -0.3 to Vdd +0.3 V - Digital I/O Pins (DATA/SCK) to Vdd
- 1.5-3.6 V
- 3 V Typical
- 3.8 Vdc - Supply Voltage (Peak)
Temperature Effect
- -0.15 % Relative Humidity/°C - Temperature Coefficient from 0° to 80° C (32° to 176° F)
Thermal Drift
- 0.04° C/Year Typical - Long Term Drift
- 0.5 % Relative Humidity/Year Typical - Long Term Drift
- Home Appliance
- Humidifier
- Medical
- Printers
