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TMP17 Folha de dados(PDF) 1 Page - Analog Devices |
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TMP17 Folha de dados(HTML) 1 Page - Analog Devices |
1 / 8 page FUNCTIONAL DIAGRAM NC V V NC NC NC NC NC PACKAGE DIAGRAM SO-8 1 2 3 4 8 7 6 5 TOP VIEW (Not to Scale) NC = NO CONNECT NC NC NC NC NC V V NC REV. 0 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 rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a Low Cost, Current Output Temperature Transducer TMP17* FEATURES Operating Temperature Range: 40 C to 105 C Single Supply Operation: 4 V to 30 V Excellent Repeatability and Stability High Level Output: 1 A/K Monolithic IC: Temperature In/Current Out Minimal Self-Heating Errors APPLICATIONS Appliance Temperature Sensor Automotive Temperature Measurement and Control HVAC System Monitoring Industrial Temperature Control Thermocouple Cold Junction Compensation GENERAL DESCRIPTION The TMP17 is a monolithic integrated circuit temperature transducer that provides an output current proportional to absolute temperature. For a wide range of supply voltages the transducer acts as a high impedance temperature dependent current source of 1 µA/K. Improved design and laser wafer trimming of the IC’s thin-film resistors allows the TMP17 to achieve absolute accuracy levels and nonlinearity errors previously unattainable at a comparable price. The TMP17 can be employed in applications between 40 °C to 105 °C where conventional temperature sensors (i.e., thermistor, RTD, thermocouple, diode) are currently being used. Expensive linearization circuitry, precision voltage references, bridge components, resistance measuring circuitry and cold junction compensation are not required with the TMP17. The TMP17 is available in a low cost SO-8 surface-mount package. PRODUCT HIGHLIGHTS 1. A wide operating temperature range ( 40 °C to 105°C) and highly linear output make the TMP17 an ideal substi- tute for older, more limited sensor technologies (i.e., therm- istors, RTDs, diodes, thermocouples). 2. The TMP17 is electrically rugged; supply irregularities and variations or reverse voltages up to 20 V will not damage the device. 3. Because the TMP17 is a temperature dependent current source, it is immune to voltage noise pickup and IR drops in the signal leads when used remotely. 4. The high output impedance of the TMP17 provides greater than 0.5 °C/V rejection of supply voltage drift and ripple. 5. Laser wafer trimming and temperature testing insures that TMP17 units are easily interchangeable. 6. Initial system accuracy will not degrade significantly over time. The TMP17 has proven long term performance and repeatability advantages inherent in integrated circuit design and construction. © Analog Devices, Inc., 1996 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 *Protected by U.S. Patent No. 4,123,698 378 343 273 248 1µA/K 45 25 0 70 105 125 TEMPERATURE – C Figure 1. Transfer Characteristic |
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