Low Cost, 2.7 V to 5.5 V, Pin-Selectable Temperature Switches in SOT-23 Data Sheet ADT6401/ADT6402 FEATURES FUNCTIONAL BLOCK DIAGRAM V GND CC 0.5C (typical) threshold accuracy 4 5 Pin-selectable trip points from 45C to +5C in 10C increments (undertemperature) - ADT6401 TEMPERATURE-TO- 45C to 115C in 10C increments (overtemperature) DIGITAL CONVERTER COMPARATOR 6 TOVER/TUNDER Maximum operating temperature of 125C Open-drain output (ADT6401) S2 1 Push-pull output (ADT6402) TRIP POINT AND S1 2 2C/10C HYSTERESIS Pin-selectable hysteresis of 2C and 10C DECODING S0 3 Supply current of 30 A (typical) Space-saving, 6-lead SOT-23 package APPLICATIONS Figure 1. Medical equipment Automotive Cell phones Hard disk drives Personal computers Electronic test equipment Domestic appliances Process control GENERAL DESCRIPTION The ADT6401/ADT6402 are trip point temperature switches When the ADT6401/ADT6402 are used for monitoring tempera- available in a 6-lead SOT-23 package. Each part contains an tures from 45C to +5C, the logic output pin becomes active internal band gap temperature sensor for local temperature when the temperature goes lower than the selected trip point sensing. When the temperature crosses the trip point setting, temperature. the logic output is activated. The ADT6401 logic output is PRODUCT HIGHLIGHTS active low and open-drain. The ADT6402 logic output is active 1. - based temperature measurement gives high accuracy high and push-pull. The temperature is digitized to a resolution and noise immunity. of 0.125C (11-bit). The pin-selectable trip point settings are 2. Wide operating temperature range from 55C to +125C. 10C apart starting from 45C to +5C for undertemperature 3. 0.5C typical accuracy from 45C to +115C. switching, and from 45C to 115C for overtemperature 4. Pin-selectable threshold settings from 45C to +115C in switching. 10C increments. These devices typically consume 30 A of supply current. Hystere- 5. Supply voltage is 2.7 V to 5.5 V. sis is pin selectable at 2C and 10C. The temperature switch is 6. Supply current of 30 A. specified to operate over the supply range of 2.7 V to 5.5 V. 7. Space-saving, 6-lead SOT-23 package. When the ADT6401/ADT6402 are used for monitoring tempera- 8. Pin-selectable temperature hysteresis of 2C or 10C. tures from 45C to 115C, the logic output pin becomes active 9. Temperature resolution of 0.125C. when the temperature goes higher than the selected trip point temperature. Rev. C Document Feedback 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 20082013 Analog Devices, Inc. All rights reserved. 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. Technical Support www.analog.com 07415-001ADT6401/ADT6402 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation .........................................................................9 Applications ....................................................................................... 1 Circuit Information .......................................................................9 Functional Block Diagram .............................................................. 1 Converter Details ..........................................................................9 General Description ......................................................................... 1 Pin-Selectable Trip Point and Hysteresis ...................................9 Product Highlights ........................................................................... 1 Temperature Conversion ........................................................... 10 Revision History ............................................................................... 2 Applications Information .............................................................. 11 Specifications ..................................................................................... 3 Thermal Response Time ........................................................... 11 Absolute Maximum Ratings ............................................................ 4 Self-Heating Effects .................................................................... 11 ESD Caution .................................................................................. 4 Supply Decoupling ..................................................................... 11 Pin Configurations and Function Descriptions ........................... 5 Temperature Monitoring ........................................................... 11 Typical Performance Characteristics ............................................. 6 Outline Dimensions ....................................................................... 12 Typical Application Circuits ............................................................ 8 Ordering Guide .......................................................................... 12 REVISION HISTORY 4/13Rev. B to Rev. C Change to Figure 16 ......................................................................... 8 9/12Rev. A to Rev. B Change to Specifications Table 1, Supply Current Parameter .... 3 6/10Rev. 0 to Rev. A Changes to Table 4 ........................................................................... 9 Updated Outline Dimensions ....................................................... 12 5/08Revision 0: Initial Version Rev. C Page 2 of 12