Datasheet ADT7301 (Analog Devices)

±1°C Accurate, 13-Bit, Digital Temperature Sensor ADT7301 FEATURES FUNCTIONAL BLOCK DIAGRAM 13-bit temperature-to-digital converter −40°C to +150°C operating temperature range BAND GAP 13-BIT TEMPERATURE ANALOG/DIGITAL ±0.5°C typical accuracy SENSOR CONVERTER 0.03125°C temperature resolution GND VDD Shutdown current of 1 μA TEMPERATURE ADT7301 VALUE Power dissipation of 0.631 mW at VDD = 3.3 V REGISTER SPI- and DSP-compatible serial interface Shutdown mode CS SERIAL Space-saving SOT-23 and MSOP packages BUS SCLK INTERFACE DIN Compatible with AD7814 DOUT
02884-0-001
APPLICATIONS
Figure 1.
Medical equipment Automotive Environmental controls Oil temperature Hydraulic systems Cellular phones Hard disk drives Personal computers Electronic test equipment Office equipment Domestic appliances Process control GENERAL DESCRIPTION PRODUCT HIGHLIGHTS
The ADT7301 is a complete temperature monitoring system 1. On-chip temperature sensor that allows an accurate available in SOT-23 and MSOP packages. It contains a band gap measurement of the ambient temperature. The measurable temperature sensor and a 13-bit ADC to monitor and digitize temperature range is −40°C to +150°C. the temperature reading to a resolution of 0.03125°C. 2. Supply voltage of 2.7 V to 5.25 V. The ADT7301 has a flexible serial interface that allows easy interfacing to most microcontrollers. The interface is compati- 3. Space-saving 6-lead SOT-23 and 8-lead MSOP packages. ble with SPI®, QSPI™, and MICROWIRE™ protocols as well as 4. Typical temperature accuracy of ±0.5°C. DSPs. The part features a standby mode that is controlled via the serial interface. The ADT7301’s wide supply voltage range, 5. 13-bit temperature reading to 0.03125°C resolution. low supply current, and SPI-compatible interface make it ideal 6. Shutdown mode that reduces the power consumption to for a variety of applications including personal computers, 4.88 μW with VDD = 3.3 V @ 1 SPS. office equipment, automotive, and domestic appliances. The ADT7301 is rated for operation over the −40°C to +150°C 7. Compatible with AD7814. temperature range. It is not recommended to operate the device at temperatures above +125°C for greater than a total of 5% (5,000 hours) of the lifetime of the device. Exposure beyond this limit affects device reliability.
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Document Outline Features Applications Functional Block Diagram General Description Product Highlights Revision History Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Theory of Operation Converter Details Temperature Value Register Temperature Conversion Equations Serial Interface Read Operation Write Operation Applications Information Microprocessor Interfacing ADT7301-to-MC68HC11 Interface ADT7301-to-8051 Interface ADT7301-to-PIC16C6x/7x Interface ADT7301-to-ADSP-21xx Interface Mounting the ADT7301 Supply Decoupling Outline Dimensions Ordering Guide