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ADT6504 Datasheet(PDF) 1 Page - Analog Devices |
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ADT6504 Datasheet(HTML) 1 Page - Analog Devices |
1 / 16 page Low Cost, 2.7 V to 5.5 V, Micropower Temperature Switches in SOT-23 Preliminary Technical Data ADT6501/ADT6502/ADT6503/ADT6504 Rev. PrA Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 © 2006 Analog Devices, Inc. All rights reserved. FEATURES ±0.5°C (typ) accuracy over temperature range Factory set trip points from −45°C to +15°C in 10°C increments Factory set trip points from +35°C to +115°C in 10°C increments No external components required Max 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 (typ) Space saving 5-lead SOT23 package APPLICATIONS Medical equipment Automotive Cell phone Hard disk drives Personal computers Electronic test equipment Domestic appliances Process control FUNCTIONAL BLOCK DIAGRAM CLK AND TIMING GENERATION 4 3 LPF Σ-Δ DIGITAL COMPARATOR TOVER VCC 1 GND HYST TEMPERATURE SENSOR 1-BIT 12-BIT DECIMATOR 1-BIT DAC REFERENCE + – 5 FACTORY PRESET TRIP POINT REGISTER 2 GND 2°C/10°C Figure 1. GENERAL DESCRIPTION The ADT6501/ADT6502/ADT6503/ADT6504 are trip point temperature switches available in a 5-lead SOT23 package. It 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 +0.0625°C (12 bit). The factory 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 30μA 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. ADT6501 and ADT6502 are used for monitoring temperatures from +35°C to +115°C only. Hence, 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 temperatures from −45°C to +15°C only. Hence, the logic output pin becomes active when the temperature goes lower than the selected trip point temperature. PRODUCT HIGHLIGHTS 1. ±0.5°C typical from −55°C to +125°C. 2. Factory threshold settings from −45°C to +115°C in 10°C increments 3. Supply voltage is 2.7 V to 5.5 V. 4. Supply current of 30 μA. 5. Space-saving 5-lead SOT23 package. 6. Pin selectable temperature hysteresis of 2°C or 10°C. 7. Temperature resolution of 0.0625°C. |
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