Overview
The digital thermopile sensor is a TO39 packaged infrared thermopile temperature sensor that does not require direct contact with the object being measured when measuring the temperature of the object. It comes with an I2C interface for various application interfaces to communicate with the sensor. Compared to conventional thermopile temperature sensors that only output voltage signals, their internal integration includes infrared thermopiles, temperature compensation resistors, and ASIC chips. Thermopile is based on Seebeck principle and is formed by connecting dozens or hundreds of pairs of thermocouples in series through MEMS technology. The thermopile absorbs infrared energy radiated from the measured object, generating a corresponding voltage difference at the cold and hot ends; The built-in temperature compensation resistor can sense the internal temperature of the sensor at any time to achieve temperature compensation; Through the built-in algorithm and calibration process of ASIC, the voltage signal can be converted into a corresponding temperature signal, enabling the sensor to quickly and accurately detect the temperature of the target. The sensor can be used in the range of 10°C to +85°C, and the test temperature range is – 20~+250°C, which has widely application filed.
Key Features
- TO-39 metal package, various viewing angle, measure distance is optional;
- Full integrated digital infrared thermopile, calibrated before leave factory;
- I2C output with internal temperature compensation;
- 2.6V to 5.5V single power supply for continuous operation;
- Signal sampling speed settable: adjustable 16-step speed (0.02Hz~2KHz);
- Good stability and wide working temperature range: -10~65°C ;
- Built-in high-precision 20 Bit sigma delta ADC, ENOB up to 16 bits;
- Temperature measurement range: -20~+250°C ;
- Temperature measurement accuracy: ±1°C , or ± 2% of the output value, whichever is the maximum.
Applications
- Non-contact temperature measuring
- Household appliances (Air conditioners, hair dryers, range hood etc), intelligent temperature induction and control system
- Continuous temperature control of production process
- Living object intrusion detection
- Interactive power control
- Comfort index measurement
- Lighting unit control
- Power management system
- Battery pack thermal management
Technical Specifications
| Parameter | Unit | Min | Typical | Max |
| Sensitive area of thermopile | mm2 | / | 0.7×0.7 | / |
| Field of view | Degree | 54 | ||
| Power supply range | V | 2.6 | 5.5 | |
| Power current | Ua | / | / | 300 |
| Working temperature range | °C | -20 | / | +85 |
| Storage temperature range | °C | -40 | / | +125 |
| ESD rated power | V | / | ±4000 | / |
| Filter wavelength range | um | 5.5 | / | 14 |
| Temperature measurement range | °C | -20 | 250 | |
| Temperature measurement accuracy | °C | / | ±1°C for below 100°C range;±2% for over 100°C | / |
