Analog Devices Inc. ADT7422 Digital Temperature Sensor
Analog Devices Inc. ADT7422 Digital Temperature Sensor is designed to meet the ASTM E1112 standard of clinical thermometry specification. This temperature sensor operates with 210µA of the average supply current at 3V. The ADT7422 sensor provides a 16-bit temperature, 0.0078°C resolution, and up to ±0.1°C accuracy without calibration after the PCB soldering process. The ADT7422 sensor offers shutdown mode to power down the device and provides a shutdown current of 2µA at 3V input voltage. This sensor is used in applications such as Vital Signs Monitoring (VSM), medical equipment, thermocouple cold junction compensation, and laser diode temperature control.
Features
- Low power:
- 140µW typical at 3V in 1 SPS mode
- 6µW typical at 3V in shutdown mode
- Programmable interrupts:
- Critical overtemperature interrupt
- Over-temperature and under-temperature interrupt
- I2C compatible interface
- Single implementation:
- No temperature calibration or correction required
- No linearity correction required
- 0.0073°C ultra-low temperature drift
- Ultra-low temperature drift:
- 0.0073°C
- Low power consumption
- Long-term stability and reliability
- No calibration and correction required
- High accuracy for industrial, instrumentation, and medical applications
Applications
- Vital Signs Monitoring (VSM)
- Medical equipment
- Resistance temperature detector (RTD) and thermistor replacement
- Food transportation and storage
- Thermocouple cold junction compensation
- Environmental monitoring and Heating, Ventilation, and Air Conditioning (HVAC)
- Laser diode temperature control
Block Diagram
Published: 2020-04-22
| Updated: 2022-03-10