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TMP01ESZ1 데이터시트(PDF) 1 Page - Analog Devices |
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TMP01ESZ1 데이터시트(HTML) 1 Page - Analog Devices |
1 / 20 page Low Power Programmable Temperature Controller TMP01 Rev. E Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 ©1993–2009 Analog Devices, Inc. All rights reserved. FEATURES −55°C to +125°C (−67°F to +257°F) operation ±1.0°C accuracy over temperature (typ) Temperature-proportional voltage output User-programmable temperature trip points User-programmable hysteresis 20 mA open-collector trip point outputs TTL/CMOS compatible Single-supply operation (4.5 V to 13.2 V) PDIP, SOIC, and TO-99 packages APPLICATIONS Over/under temperature sensor and alarm Board-level temperature sensing Temperature controllers Electronic thermostats Thermal protection HVAC systems Industrial process control Remote sensors FUNCTIONAL BLOCK DIAGRAM VPTAT V+ TEMPERATURE SENSOR AND VOLTAGE REFERENCE 2.5V SENSOR 1 2 3 4 8 7 6 5 HYSTERESIS GENERATOR WINDOW COMPARATOR TMP01 VREF SET HIGH SET LOW GND UNDER OVER R1 R2 R3 Figure 1. GENERAL DESCRIPTION The TMP01 is a temperature sensor that generates a voltage output proportional to absolute temperature and a control signal from one of two outputs when the device is either above or below a specific temperature range. Both the high/low temperature trip points and hysteresis (overshoot) band are determined by user-selected external resistors. For high volume production, these resistors are available on board. The TMP01 consists of a band gap voltage reference combined with a pair of matched comparators. The reference provides both a constant 2.5 V output and a voltage proportional to absolute temperature (VPTAT) which has a precise temperature coefficient of 5 mV/K and is 1.49 V (nominal) at 25°C. The comparators compare VPTAT with the externally set tempera- ture trip points and generate an open-collector output signal when one of their respective thresholds has been exceeded. Hysteresis is also programmed by the external resistor chain and is determined by the total current drawn out of the 2.5 V reference. This current is mirrored and used to generate a hysteresis offset voltage of the appropriate polarity after a comparator has been tripped. The comparators are connected in parallel, which guarantees that there is no hysteresis overlap and eliminates erratic transitions between adjacent trip zones. The TMP01 utilizes proprietary thin-film resistors in conjunc- tion with production laser trimming to maintain a temperature accuracy of ±1°C (typical) over the rated temperature range, with excellent linearity. The open-collector outputs are capable of sinking 20 mA, enabling the TMP01 to drive control relays directly. Operating from a 5 V supply, quiescent current is only 500 μA (max). The TMP01 is available in 8-pin mini PDIP, SOIC, and TO-99 packages. |
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