3.3v I2C SHT45 Temperature And Humidity SensorElectrical CharacteristicsTypical Operating Voltage: 3.3 VCurrent Consumption (Typical):0.4 µA at 1 measurement per second80 nA in idle/sleep modeI²C Address:Default: 0x44Optional Alternate: 0x45I²C Speed:Standard, Fast, Fast Mode Plus (up to 1 MHz)Logic Level Compatibility: 1.8–3.3 V devicesHeater: Integrated low-power heater (multiple power levels)Temperature Measurement SpecificationsMeasurement Range: –40 °C to 125 °CTypical Accuracy: ±0.1 °CMax Accuracy Deviation: ±0.2–0.3 °C (depending on temperature)Resolution: 0.01 °CRepeatability:High repeatability: ±0.04 °CMedium: ±0.07 °CLow: ±0.10 °CResponse Time (τ63%): ~2 secondsLong-Term Drift: < 0.03 °C per yearHumidity Measurement SpecificationsMeasurement Range: 0 %RH to 100 %RHTypical Accuracy: ±1.0 %RHMax Accuracy Deviation: ±1.5 %RH (varies by RH range)Resolution: 0.01 %RHRepeatability:High repeatability: ±0.05 %RHMedium: ±0.08 %RHLow: ±0.12 %RHHysteresis: ±1 %RHResponse Time (τ63%): ~8 seconds (in still air)Long-Term Drift: < 0.25 %RH per yearCondensation Handling: Fully functional even in condensing conditionsAdditional FeaturesFactory calibrated (temperature & humidity)On-chip digital signal processingCRC checksum for robust data transmissionIntegrated heater for sensor recovery in high humidityUltra-low power design for battery applicationsHigh stability and low driftISO 17025-calibrated (3-point calibration)Physical CharacteristicsTypical Breakout Board Size:~25.5 mm × 17.7 mm (varies by manufacturer)Weight: ~1–2 gIncludes pull-up resistors and JST-SH Qwiic/StemMA connector (optional)Operating EnvironmentFully operational from –40 to 125 °CMaintains accuracy between 5–60 °C and 20–80 %RHCan withstand prolonged high humidityResistant to contamination and aging when handled properly SKU: LKSEN00102 Category: Sensors
