ScioSense — ENS210 Relative Humidity and Temperature Sensor

ScioSense ENS210 Relative Humidity and Temperature Sensor

Comes pre-calibrated in a QFN4 package

The ScioSense ENS210 is a high-performance digital output sensor that monolithically integrates a relative humidity sensor and a high-accuracy temperature sensor. The device comes pre-calibrated in a QFN4 package and includes an I²C slave interface for communication with a host processor.

The benefits and features of the ENS210:

ENS210 Applications

• Building Automation / Smart home / HVAC
  • Indoor air quality detection
  • Demand-controlled ventilation
  • Smart thermostats
• Home appliances
  • Air cleaners & purifiers
  • Refrigerators, washing machines, dishwashers, dryers
• Mobile devices & wearables
• Internet of Things (IoT) devices Portable devices for personal health and wellness
• Weather stations

Functional Characteristics

The ENS210 integrates two sensor blocks: temperature and relative humidity.

Temperature Sensor
The temperature sensor block determines the ambient temperature, and outputs a calibrated value in Kelvin.

The temperature is measured using a high-precision (12 bits) zoom-ADC. The analog part is able to measure a strongly temperature dependent X = VBE/ΔVBE. The X is found by first applying a coarse search (successive approximation), and then a sigma-delta in a limited range.

Humidity Sensor
The relative humidity sensor determines the ambient relative humidity and outputs a calibrated value in %RH.

The transducer (the CX on the top left) consists of a large-area capacitor covered with a humidity-sensitive material. The capacitance change is proportional to the change in relative humidity, and has a linear dependence on temperature. The capacitance is measured by a high-precision 2nd order sigma-delta converter.

ENS210 Block Diagram

ENS210 Evaluation Kit

The ENS210 is a relative humidity and temperature sensor with I²C interface.

The ENS210 Evaluation Kit is a combination of an ENS210 shield and a USB to I²C dongle. The evaluation kit connects to a Windows PC via USB port and the sensor is powered via the USB connector. It can be controlled by a Windows PC based application, which demonstrates the relative humidity and temperature values measured by the sensor. The PC application can also be used for logging of sensor data as well as to monitor the I²C transaction. The evaluation kit can also be used for quick integration into end customer’s application.

The ENS210 evaluation kit comes with an extensive set of documentation such as a quick start guide, a user manual, application notes, reference drivers for easy design in, and more.

Dashboard Software » | Quick Start Guide » | User Guide »