ADT7310/ADT7410 High Accuracy Digital Temperature

ADT7310/ADT7410 High Accuracy Digital Temperature

ADI’s ADT7310 and ADT7410 are high accuracy digital temperature sensors. They contain a band gap temperature reference and an ADC to monitor and digitize the temperature. The ADC resolution is set to 13-bits (+0.0625°C) by default. This resolution changes to 16-bits (+0.0078°C) by setting bit 7 in the configuration register.

The ADT7310 and ADT7410 are guaranteed to operate over supply voltages from 2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is typically 210 μA. These sensors have a shutdown mode that powers down the device and offers a shutdown current of typically 2 μA. They are rated for operation over the -55°C to +150°C temperature range. The CT pin is an open-drain output that becomes active when the temperature exceeds a programmable critical temperature limit. The default critical temperature limit is +147°C. The INT pin is also an open-drain output that becomes active when the temperature exceeds a programmable limit. The INT and CT pins can operate in either comparator or interrupt mode. The ADT7310/ADT7410 are ideal for medical equipment, environmental control systems, and thermal protection applications.

Features
  • High performance
    • Temperature accuracy
      • ±0.5°C from -40°C to +105°C (2.7 V to 3.6 V)
      • ±0.4°C from -40°C to +105°C (3.0 V)
    • 16-bit temperature resolution: +0.0078°C
    • Fast first temperature conversion on power-up of 6 ms
  • Easy implementation
    • No temperature calibration/correction required by the user
    • No linearity correction required
  • I2C-compatible interface
  • 8-lead narrow SOIC package
  • Low power
    • Power saving 1 sample per second (SPS) mode
    • 700 µW typical at 3.3 V in normal mode
    • 7 µW typical at 3.3 V in shutdown mode
  • Wide operating ranges
    • Temperature range: -55°C to +150°C
    • Voltage range: 2.7 V to 5.5 V
  • Programmable interrupts
    • Critical overtemperature interrupt
    • Overtemperature/under temperature interrupt
Applications
 
  • Medical equipment
  • Computer thermal monitoring
  • Environmental control systems
 
  • Power system monitors
  • Handheld applications
Manufacturer