ADT7310 Datasheet

• Easy implementation
  No temperature calibration/correction required by user
  No linearity correction required
• 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
• 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
• See datasheet for additional features

• Medical equipment
• Environmental control systems
• Computer thermal monitoring
• Thermal protection
• Industrial process control
• Power system monitors
• Hand-held applications

The ADT7310 is a high accuracy digital temperature sensor in a narrow SOIC package. It contains a band gap temperature reference and a 13-bit ADC to monitor and digitize the temperature to a 0.0625°C resolution. The ADC resolution, by default, is set to 13 bits (0.0625 °C). This can be changed to 16 bits (0.0078 °C) by setting Bit 7 in the configuration register (Register Address 0x01).

The ADT7310 is 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. The ADT7310 has a shutdown mode that powers down the device and offers a shutdown current of typically 2 μA. The ADT7310 is 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.