Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23 Data Sheet ADT6501/ADT6502/ADT6503/ADT6504 FEATURES FUNCTIONAL BLOCK DIAGRAM V CC 0.5C (typical) threshold accuracy 4 Factory-set trip points from ADT6501 45C to +15C in 10C increments +35C to +115C in 10C increments - TEMPERATURE-TO- No external components required DIGITAL CONVERTER COMPARATOR 5 TOVER Maximum temperature of 125C Open-drain output (ADT6501/ADT6503) Push-pull output (ADT6502/ADT6504) FACTORY PRESET Pin-selectable hysteresis of 2C and 10C TRIP POINT REGISTER Supply current of 30 A (typical) 2C/10C Space-saving, 5-lead SOT-23 package 1 2 3 APPLICATIONS GND GND HYST Medical equipment Figure 1. Automotive Cell phones Hard disk drives Personal computers Electronic test equipment Domestic appliances Process control GENERAL DESCRIPTION The ADT6501/ADT6502/ADT6503/ADT6504 are trip point The ADT6503 and ADT6504 are used for monitoring tempera- temperature switches available in a 5-lead SOT-23 package. tures from 45C to +15C only. Therefore, the logic output Each part contains an internal band gap temperature sensor for pin becomes active when the temperature goes lower than the local temperature sensing. When the temperature crosses the selected trip point temperature. trip point setting, the logic output is activated. The ADT6501/ PRODUCT HIGHLIGHTS ADT6503 logic output is active low and open-drain. The 1. - based temperature measurement gives high accuracy ADT6502/ADT6504 logic output is active high and push-pull. and noise immunity. The temperature is digitized to a resolution of 0.125C (11-bit). The factory trip point settings are 10C apart starting from 2. Wide operating temperature range from 55C to +125C. 45C to +15C for the cold threshold models and from +35C 3. 0.5C typical accuracy from 45C to +115C. to +115C for the hot threshold models. 4. Factory threshold settings from 45C to +115C in These devices require no external components and typically 10C increments. consume 30 A supply current. Hysteresis is pin-selectable at 5. Supply voltage is 2.7 V to 5.5 V. 2C and 10C. The temperature switch is specified to operate over the supply range of 2.7 V to 5.5 V. 6. Supply current of 30 A. The ADT6501 and ADT6502 are used for monitoring 7. Space-saving, 5-lead SOT-23 package. temperatures from +35C to +115C only. Therefore, the logic 8. Pin-selectable temperature hysteresis of 2C or 10C. output pin becomes active when the temperature goes higher 9. Temperature resolution of 0.125C. than the selected trip point temperature. Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. 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Technical Support www.analog.com 06096-001ADT6501/ADT6502/ADT6503/ADT6504 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Converter Details ..........................................................................8 Applications ....................................................................................... 1 Factory-Programmed Threshold Range ....................................8 Functional Block Diagram .............................................................. 1 Hysteresis Input .............................................................................8 General Description ......................................................................... 1 Temperature Conversion ..............................................................8 Product Highlights ........................................................................... 1 Application Information ................................................................ 10 Revision History ............................................................................... 2 Thermal Response Time ........................................................... 10 Specifications ..................................................................................... 3 Self-Heating Effects .................................................................... 10 Absolute Maximum Ratings ............................................................ 4 Supply Decoupling ..................................................................... 10 ESD Caution .................................................................................. 4 Temperature Monitoring ........................................................... 10 Pin Configurations and Function Descriptions ........................... 5 Typical Application Circuits ......................................................... 11 Typical Performance Characteristics ............................................. 6 Outline Dimensions ....................................................................... 13 Theory of Operation ........................................................................ 8 Ordering Guide .......................................................................... 13 Circuit Information ...................................................................... 8 REVISION HISTORY 9/12Rev. A to Rev. B Changes to Product Highlights ....................................................... 1 Change to Supply Current Parameter, Table 1 .............................. 3 Changes to Table 1 ............................................................................. 3 Changes to Typical Performance Characteristics ......................... 6 Updated Outline Dimensions ....................................................... 13 Changes to Ordering Guide .......................................................... 13 1/08Rev. 0 to Rev. A 9/07Revision 0: Initial Version Added ADT6503 and ADT6504 ....................................... Universal Changes to Features .......................................................................... 1 Rev. B Page 2 of 16