1C Accurate, 12-Bit Digital Temperature Sensor Data Sheet ADT75 FEATURES PRODUCT HIGHLIGHTS 12-bit temperature-to-digital converter 1. On-chip temperature sensor allows an accurate measurement B grade accuracy 1.0C from 0C to 70C of the ambient temperature. The measurable temperature A grade accuracy 2.0C from 25C to +100C range is 55C to +125C. 2 SMBus/I C-compatible interface 2. Supply voltage is 2.7 V to 5.5 V. Operation from 55C to +125C 3. Space-saving, 8-lead MSOP and 8-lead SOIC. Operation from 2.7 V to 5.5 V 4. Temperature accuracy is 1C maximum. Overtemperature indicator 5. Temperature resolution is 0.0625C. Shutdown mode for low power consumption 6. Shutdown mode reduces the current consumption to Power consumption 79 W typically at 3.3 V 3 A typical. 2 Small, low cost 8-lead MSOP in Pb-Sn and Pb-free packages 7. Connect up to eight ADT75s to a single SMBus/I C bus. Standard 8-lead SOIC Pb-free package APPLICATIONS Isolated sensors Environmental control systems Computer thermal monitoring Thermal protection Industrial process control Power-system monitors Hand-held applications FUNCTIONAL BLOCK DIAGRAM V DD 8 DIGITAL 12-BIT COMPARATOR 3 OS/ALERT DECIMATOR LPF TEMPERATURE SENSOR 1-BIT TEMPERATURE SENSOR REGISTER + CONFIGURATION REGISTER REFERENCE - 1-BIT DAC T SETPOINT HYST REGISTER CLK AND TIMING T SETPOINT GENERATION OS POINTER REGISTER REGISTER 7 A0 1 SDA 6 2 A1 SMBus/I C INTERFACE 2 SCL 5 A2 4 GND Figure 1. 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 Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 20052012 Analog Devices, Inc. All rights reserved. 05326-001ADT75 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Functional Description .............................................................. 10 Applications ....................................................................................... 1 Temperature Data Format ......................................................... 11 Product Highlights ........................................................................... 1 One-Shot Mode .......................................................................... 12 Functional Block Diagram .............................................................. 1 Fault Queue ................................................................................. 12 Revision History ............................................................................... 2 Registers ....................................................................................... 13 General Description ......................................................................... 3 Serial Interface ............................................................................ 16 Specifications ..................................................................................... 4 Writing Data ............................................................................... 17 A Grade .......................................................................................... 4 Reading Data ............................................................................... 18 B Grade .......................................................................................... 5 OS/Alert Output OverTemperature Modes ............................ 19 Timing Specifications and Diagram .......................................... 6 SMBus Alert ................................................................................ 20 Absolute Maximum Ratings ............................................................ 7 Applications Information .............................................................. 21 ESD Caution .................................................................................. 7 Thermal Response Time ........................................................... 21 Pin Configuration and Function Descriptions ............................. 8 Self-Heating Effects .................................................................... 21 Typical Performance Characteristics ............................................. 9 Supply Decoupling ..................................................................... 21 Theory of Operation ...................................................................... 10 Temperature Monitoring ........................................................... 22 Circuit Information .................................................................... 10 Outline Dimensions ....................................................................... 23 Converter Details........................................................................ 10 Ordering Guide .......................................................................... 24 REVISION HISTORY 8/12Rev. A to Rev. B 9/10Rev. 0 to Rev. A Changed 3 V to 2.7 V, Features Section and 3 V to 2.7 V, Changes to Figure 1 ........................................................................... 1 Product Highlights Section ............................................................. 1 Updated Outline Dimensions ....................................................... 23 Changed 3 V to 2.7 V, General Description Section .................... 3 Changes to Ordering Guide .......................................................... 23 Changed 3 V to 2.7 V, A Grade Section and 3 V to 2.7 V, Table 1 .... 4 10/05Revision 0: Initial Version Changed 3 V to 2.7 V, B Grade Section and 3 V to 2.7 V, Table 2 .... 5 Changed 3 V to 2.7 V, Table 5 .................................................................... 8 Changes to Figure 7 and Figure 8 ................................................... 9 Rev. B Page 2 of 24