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

Analog Devices Inc. ADT7422 Digital Temperature Sensor

Features

Applications

Block Diagram

husseinkey ELECTRONICS®

COMPANY