Datasheet HS400x High Performance Relative Humidity and Temperature Sensor with Digital Output The HS400x series is a highly accurate, fully Features calibrated automotive-grade relative humidity and Humidity range: 0% to 100%RH temperature sensor. The MEMS sensor features a Automotive grade, AEC-Q100 qualified, Grade 2, proprietary sensor-level protection, ensuring high -40C to +105C reliability and long-term stability. Industrial grade, JEDEC qualified, -40C to Integrated calibration and temperature-compensation +125C logic provides fully corrected RH and temperature 2 2 Digital I C output with CRC checksum values via a standard I C output. No user calibration of the output data is required. RH accuracy: 1.5%RH, typical (HS4001) 14-bit resolution: 0.04%RH, typical The high accuracy, fast measurement response time, and long-term stability combined with the small Independent programmable resolution settings: 8, package size makes the HS400x series ideal for a 10, 12, 14 bits wide number of applications ranging from portable Fast RH response time: 4 seconds time constant, devices to products designed for harsh typical environments. Temperature sensor accuracy: 0.2C, typical The HS400x series digital sensor accurately (HS4001, HS4002, -10 to +80C) measures relative humidity and temperature levels. Very low current consumption: 0.3A average (8- The measured data is internally corrected and bit resolution, 3.3V supply), 0.62A average (14-bit compensated for accurate operation over a wide resolution, 3.3V supply), one RH and temperature range of temperature and humidity levels user measurement per second calibration is not required. Excellent stability against aging and volatile The ultra-low power consumption, micro-Watt, make compounds the HS400x the ideal choice for portable and remote Highly robust protection from harsh environmental applications. conditions and mechanical shock Physical Characteristics Applications Supply voltage: 1.71V to 3.6V Climate control systems Operating temperature: -40C to +125C Instrumentation 2.5 2.5 0.9 mm DFN-style 8-LGA package Home appliances Weather stations Building automation HVAC systems Medical equipment Data logging systems Product Image R36DS0022EU0103 Rev.1.03 Page 1 Jun 6, 2022 2022 Renesas Electronics HS400x Datasheet Contents 1. Pin Information ............................................................................................................................................. 4 1.1 Pin Assignments ................................................................................................................................... 4 1.2 Pin Descriptions .................................................................................................................................... 4 2. Specifications ............................................................................................................................................... 5 2.1 Absolute Maximum Ratings .................................................................................................................. 5 2.2 Recommended Operating Conditions ................................................................................................... 5 3. Humidity and Temperature Sensor Performance ...................................................................................... 6 3.1 Humidity Sensor Specification .............................................................................................................. 6 3.2 Temperature Sensor Specification ....................................................................................................... 6 3.3 Humidity Sensor Accuracy Graphs ....................................................................................................... 7 3.4 Temperature Sensor Accuracy Graphs ................................................................................................ 8 4. Sensor Interface ........................................................................................................................................... 8 2 4.1 I C Features and Timing ....................................................................................................................... 9 4.2 Sensor Slave Address .......................................................................................................................... 9 2 4.3 I C Communication ............................................................................................................................... 9 4.4 Measurements and Commands .......................................................................................................... 11 4.4.1. Performing a Hold Measurement.......................................................................................... 11 4.4.2. Performing a No-Hold Measurement .................................................................................... 12 4.4.3. Calculating Humidity and Temperature Output..................................................................... 12 4.4.4. Measurement Conversion Times .......................................................................................... 13 4.4.5. CRC Checksum Calculation ................................................................................................. 13 4.5 Periodic Measurement Mode .............................................................................................................. 13 4.6 Alert Feature ....................................................................................................................................... 14 4.6.1. Alert Pin Measurement Active ........................................................................................... 14 4.6.2. Alert Pin Humidity and Temperature Threshold Detection ................................................ 15 4.7 Accessing Configurable HS400x Registers ........................................................................................ 16 4.7.1. Read Register Command ..................................................................................................... 17 4.7.2. Write Register Command ..................................................................................................... 17 4.8 Configuration Bits ............................................................................................................................... 18 4.8.1. Setting the Measurement Resolution ................................................................................... 18 4.8.2. Periodic Measurement Settings............................................................................................ 18 4.9 Reading the Sensor ID Number .......................................................................................................... 20 5. Application Circuit ...................................................................................................................................... 21 6. Soldering Information ................................................................................................................................ 21 7. PCB Layout Guide ...................................................................................................................................... 23 8. Storage and Handling................................................................................................................................. 23 9. Quality and Reliability ................................................................................................................................ 23 10. Package Outline Drawings ......................................................................................................................... 24 11. Ordering Information .................................................................................................................................. 24 12. Revision History ......................................................................................................................................... 24 R36DS0022EU0103 Rev.1.03 Page 2 Jun 6, 2022