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ADT7312:  Automotive, ±1°C Accurate, 16-Bit, 175°C Digital SPI Temperature Sensor in Die Form

Product Details

Product Status:Recommended for New Designs

The ADT7312 is a ±1°C accurate digital temperature sensor that operates over a very wide temperature range, −55°C to +175°C available in die form only. It contains an internal band gap reference, a temperature sensor, and a 16-bit analog-to-digital converter (ADC) to monitor and digitize the temperature to a resolution of 0.0078°C. The ADC resolution, by default, is set to 13 bits (0.0625°C). The ADC resolution is a user programmable mode that can be changed through the serial interface.

The ADT7312 is guaranteed to operate over supply voltages from 2.7 V to 5.5 V. At 3.6 V operation, the average supply current is typically 245 μA. The ADT7312 has a shutdown mode that powers down the device, resulting in a typical shutdown current of 2.5 μA at 3.6 V. The ADT7312 is rated for operation over the −55°C to +175°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 pin and the CT pin can operate in either comparator or interrupt mode.

Product Highlights

  1. Ease of use, no calibration or correction required.
  2. Low power consumption.
  3. Excellent long-term stability and reliability.
  4. Qualified for automotive applications.

Applications

  • Automotive
  • High temperature monitoring
  • High temperature thermal protection

FEATURES and BENEFITS

  • Qualified for automotive applications
  • Temperature accuracy:
      ±1°C from −55°C to +175°C (2.7V to 3.3V)
    16-bit temperature resolution: 0.0078°C
    Fast first temperature conversion on power-up of 6 ms
  • Easy implementation:
    No temperature calibration or correction required
    No linearity correction required
  • Low power:
    Power-saving 1 sample per second (SPS) mode
    880 μW typical at 3.6 V in normal mode
    9 μW typical at 3.6 V in shutdown mode
  • Wide operating ranges:
    Temperature range: −55°C to +175°C
    Voltage range: 2.7 V to 5.5 V
  • Programmable interrupts:
    Critical overtemperature interrupt
    Overtemperature/undertemperature interrupt
  • SPI-compatible interface
  • Available in die form only

Functional Block Diagram for ADT7312

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

ADT7312 Model Options
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADT7310, ADT7311, ADT7312 and ADT7410 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADT7X10EBZ Status: Production Evaluation Board $59.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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