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ADT6502 Datasheet(PDF) 1 Page - Analog Devices |
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ADT6502 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23 Data Sheet ADT6501/ADT6502/ADT6503/ADT6504 Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license isgranted by implication or otherwise under any patent or patent rightsof Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2007–2012 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES ±0.5°C (typical) threshold accuracy Factory-set trip points from −45°C to +15°C in 10°C increments +35°C to +115°C in 10°C increments No external components required Maximum temperature of 125°C Open-drain output (ADT6501/ADT6503) Push-pull output (ADT6502/ADT6504) Pin-selectable hysteresis of 2°C and 10°C Supply current of 30 µA (typical) Space-saving, 5-lead SOT-23 package APPLICATIONS Medical equipment Automotive Cell phones Hard disk drives Personal computers Electronic test equipment Domestic appliances Process control FUNCTIONAL BLOCK DIAGRAM Figure 1. GENERAL DESCRIPTION The ADT6501/ADT6502/ADT6503/ADT6504 are trip point temperature switches available in a 5-lead SOT-23 package. Each part contains an internal band gap temperature sensor for local temperature sensing. When the temperature crosses the trip point setting, the logic output is activated. The ADT6501/ ADT6503 logic output is active low and open-drain. The ADT6502/ADT6504 logic output is active high and push-pull. The temperature is digitized to a resolution of 0.125°C (11-bit). The factory trip point settings are 10°C apart starting from −45°C to +15°C for the cold threshold models and from +35°C to +115°C for the hot threshold models. These devices require no external components and typically consume 30 μA supply current. Hysteresis is pin-selectable at 2°C and 10°C. The temperature switch is specified to operate over the supply range of 2.7 V to 5.5 V. The ADT6501 and ADT6502 are used for monitoring temperatures from +35°C to +115°C only. Therefore, the logic output pin becomes active when the temperature goes higher than the selected trip point temperature. The ADT6503 and ADT6504 are used for monitoring tempera- tures from −45°C to +15°C only. Therefore, the logic output pin becomes active when the temperature goes lower than the selected trip point temperature. PRODUCT HIGHLIGHTS 1. Σ-Δ based temperature measurement gives high accuracy and noise immunity. 2. Wide operating temperature range from −55°C to +125°C. 3. ±0.5°C typical accuracy from −45°C to +115°C. 4. Factory threshold settings from −45°C to +115°C in 10°C increments. 5. Supply voltage is 2.7 V to 5.5 V. 6. Supply current of 30 μA. 7. Space-saving, 5-lead SOT-23 package. 8. Pin-selectable temperature hysteresis of 2°C or 10°C. 9. Temperature resolution of 0.125°C. 2ºC/10ºC VCC 4 GND 1 GND 2 HYST 3 TOVER 5 FACTORY PRESET TRIP POINT REGISTER ADT6501 COMPARATOR Σ-Δ TEMPERATURE-TO- DIGITAL CONVERTER |
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