Datasheet ADT7302 (Analog Devices)

±2°C Accurate, Micropower Digital Temperature Sensor ADT7302 FEATURES FUNCTIONAL BLOCK DIAGRAM 13-bit temperature-to-digital converter −40°C to +125°C operating temperature range BAND GAP 13-BIT TEMPERATURE ANALOG/DIGITAL ±2°C accuracy SENSOR CONVERTER 0.03125°C temperature resolution GND VDD Shutdown current of 1 μA TEMPERATURE ADT7302 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
04662-001
APPLICATIONS
Figure 1.
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 GENERAL DESCRIPTION PRODUCT HIGHLIGHTS
The ADT7302 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 +125°C. the temperature reading to a resolution of 0.03125°C. 2. Supply voltage of 2.7 V to 5.25 V. The ADT7302 has a flexible serial interface that allows easy interfacing to most microcontrollers. The interface is compatible 3. Space-saving 6-lead SOT-23 and 8-lead MSOP packages. with SPI®, QSPI™, and MICROWIRE™ protocols as well as DSPs. 4. Maximum temperature accuracy of ±2°C. The part features a standby mode that is controlled via the serial interface. 5. 13-bit temperature reading to 0.03125°C resolution. The ADT7302’s wide supply voltage range, low supply current, 6. Shutdown mode that reduces the power consumption to and SPI-compatible interface make it ideal for a variety of 4.88 μW with VDD = 3.3 V at 1 SPS. applications, including PCs, office equipment, automotive, and domestic appliances. 7. Compatible with AD7814.
Rev. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2005–2011 Analog Devices, Inc. All rights reserved.
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 ADT7302 to MC68HC11 Interface ADT7302 to 8051 Interface ADT7302 to PIC16C6x/7x and PIC16F873 Interface ADT7302 to ADSP-21xx Interface Mounting the ADT7302 Supply Decoupling Outline Dimensions Ordering Guide