GENERAL DESCRIPTION

The ADT7302 is a complete temperature monitoring system available in SOT-23 and MSOP packages. It contains a band gap temperature sensor and a 13-bit ADC to monitor and digitize the temperature reading to a resolution of 0.03125°C.

The ADT7302 has a flexible serial interface that allows easy interfacing to most microcontrollers. The interface is compatible with SPI®, QSPI™, and MICROWIRE™ protocols as well as DSPs. The part features a standby mode that is controlled via the serial interface.

The ADT7302’s wide supply voltage range, low supply current, and SPI-compatible interface make it ideal for a variety of applications, including PCs, office equipment, automotive, and domestic appliances.

FEATURES

  13-bit temperature-to-digital converter

  −40°C to +125°C operating temperature range

  ±2°C accuracy

  0.03125°C temperature resolution

  Shutdown current of 1 μA

  Power dissipation of 0.631 mW at VDD = 3.3 V

  SPI- and DSP-compatible serial interface

  Shutdown mode

  Space-saving SOT-23 and MSOP packages

  Compatible with AD7814

 

APPLICATIONS

  Medical equipment

  Automotive:

     Environmental controls

     Oil temperature

     Hydraulic systems

  Cell phones

  Hard disk drives

  Personal computers

  Electronic test equipment

  Office equipment

  Domestic appliances

  Process control

PRODUCT HIGHLIGHTS

1. On-chip temperature sensor that allows an accurate measurement of the ambient temperature. The measurable temperature range is −40°C to +125°C.

2. Supply voltage of 2.7 V to 5.25 V.

3. Space-saving 6-lead SOT-23 and 8-lead MSOP packages.

4. Maximum temperature accuracy of ±2°C.

5. 13-bit temperature reading to 0.03125°C resolution.

6. Shutdown mode that reduces the power consumption to 4.88 μW with VDD = 3.3 V at 1 SPS.

7. Compatible with AD7814.