ADT7301

Preliminary Technical Data FEATURES 13-Bit, ±0.5°C Accurate, MicroPower Digital Temperature Sensor in 6-Lead SOT-23 ADT7301 FUNCTIONAL BLOCK DIAGRAM BAND GAP TEMPERATURE SENSOR GND 13-BIT ANALOG/DIGITAL CONVERTER VDD 13-bit temperature-to-digital converter −40°C to +150°C operating temperature range ±0.5°C typical 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 ADT7301 TEMPERATURE VALUE REGISTER DOUT 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 Figure 1. Functional Block Diagram GENERAL DESCRIPTION The ADT7301 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 ADT7301 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 ADT7301’s wide supply voltage range, low supply current, and SPI compatible interface make it ideal for a variety of applications, including personal...