2-Terminal IC Temperature Transducer Data Sheet AD590 FEATURES PIN CONFIGURATIONS Linear current output: 1 A/K Wide temperature range: 55C to +150C V+ 1 4NC AD590 Probe-compatible ceramic sensor package TOP VIEW 2-terminal device: voltage in/current out (Not to Scale) Laser trimmed to 0.5C calibration accuracy (AD590M) PIN 5 (EXPOSED PAD) V 2 3NC Excellent linearity: 0.3C over full range (AD590M) Wide power supply range: 4 V to 30 V NOTES Sensor isolation from case 1. NC = NO CONNECT. THE NC PIN IS NOT BONDED TO THE DIE INTERNALLY. Available in 2-lead FLATPACK, 4-lead LFCSP, 3-pin TO-52, 2. TO ENSURE CORRECT OPERATION, THE EXPOSED PAD (EP) SHOULD BE LEFT FLOATING. 8-lead SOIC, and die form + Figure 1. 2-Lead Figure 2. 4-Lead LFCSP GENERAL DESCRIPTION FLATPACK The AD590 is a 2-terminal integrated circuit temperature trans- ducer that produces an output current proportional to absolute NC 1 8 NC temperature. For supply voltages between 4 V and 30 V, the device V+ 2 7 NC TOP VIEW acts as a high impedance, constant current regulator passing V 3 (Not to Scale) 6 NC + 1 A/K. Laser trimming of the chips thin-film resistors is used 4 5 NC NC to calibrate the device to 298.2 A output at 298.2 K (25C). NC = NO CONNECT The AD590 should be used in any temperature-sensing application below 150C in which conventional electrical Figure 3. 3-Pin TO-52 Figure 4. 8-Lead SOIC temperature sensors are currently employed. The inherent low cost of a monolithic integrated circuit combined with the PRODUCT HIGHLIGHTS elimination of support circuitry makes the AD590 an attractive 1. The AD590 is a calibrated, 2-terminal temperature sensor alternative for many temperature measurement situations. requiring only a dc voltage supply (4 V to 30 V). Costly Linearization circuitry, precision voltage amplifiers, resistance transmitters, filters, lead wire compensation, and lineari- measuring circuitry, and cold junction compensation are not zation circuits are all unnecessary in applying the device. needed in applying the AD590. 2. State-of-the-art laser trimming at the wafer level in In addition to temperature measurement, applications include conjunction with extensive final testing ensures that temperature compensation or correction of discrete components, AD590 units are easily interchangeable. biasing proportional to absolute temperature, flow rate measure- ment, level detection of fluids and anemometry. The AD590 is 3. Superior interface rejection occurs because the output is a available in die form, making it suitable for hybrid circuits and current rather than a voltage. In addition, power fast temperature measurements in protected environments. requirements are low (1.5 mW 5 V 25C). These features make the AD590 easy to apply as a remote sensor. The AD590 is particularly useful in remote sensing applications. The device is insensitive to voltage drops over long lines due to 4. The high output impedance (>10 M) provides excellent its high impedance current output. Any well-insulated twisted rejection of supply voltage drift. For instance, changing the pair is sufficient for operation at hundreds of feet from the power supply from 5 V to 10 V results in only a 1 A receiving circuitry. The output characteristics also make the maximum current change, or 1C equivalent error. AD590 easy to multiplex: the current can be switched by a 5. The AD590 is electrically durable: it withstands a forward CMOS multiplexer, or the supply voltage can be switched by a voltage of up to 44 V and a reverse voltage of 20 V. logic gate output. Therefore, supply irregularities or pin reversal does not damage the device. Rev. G Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2013 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 00533-024 00533-025 00533-001 00533-104AD590 Data Sheet TABLE OF CONTENTS Features .....................................................................................1 Explanation of Temperature Sensor Specifications ................ 7 General Description ..................................................................1 Calibration Error ................................................................... 7 Pin Configurations ....................................................................1 Error vs. Temperature: Calibration Error Trimmed Out........ 7 Product Highlights ....................................................................1 Error vs. Temperature: No User Trims ................................... 7 Revision History ........................................................................2 Nonlinearity .......................................................................... 8 Specifications .............................................................................3 Voltage and Thermal Environment Effects ............................ 8 AD590J and AD590K Specifications ......................................3 General Applications ............................................................... 10 AD590L and AD590M Specifications ....................................4 Outline Dimensions ................................................................ 13 Absolute Maximum Ratings ......................................................5 Ordering Guide ................................................................... 15 ESD Caution ..........................................................................5 Product Description ..................................................................6 REVISION HISTORY Deleted Figure 22 Renumbered Sequentially .......................... 11 1/13Rev. F to Rev. G Changes to Figure 21 and Figure 22 ........................................ 11 Changes to Endnote 2, Table 1 ...................................................3 Deleted Figure 24 .................................................................... 12 Changes to Ordering Guide .....................................................15 Changes to Figure 24 ............................................................... 12 11/12Rev. E to Rev. F Updated Outline Dimensions Section ..................................... 14 Added 4-Lead LFCSP WD ......................................... Universal Changes to Ordering Guide..................................................... 14 Changes to Features Section, General Description Section, and 9/09Rev. D to Rev. E Product Highlights Section........................................................1 Changes to Product Description Section ................................... 6 Added Figure 2 Renumbered Sequentially................................1 Added Note 2, Table 1 Renumbered Sequentially .....................3 Updated Outline Dimensions .................................................. 13 Changes to Ordering Guide..................................................... 14 Changes to (Unbolded) For 8-Lead SOIC Package, AD590J and AD590K Parameter, Table 1.......................................................3 1/06Rev. C to Rev. D Changes to Note 1, Table 3.........................................................5 Updated Format ...........................................................Universal Changes to Product Description Section ...................................6 Changes to Figure 4 Equation.................................................... 4 Change to Figure 6.....................................................................6 9/03Rev. B to Rev. C Changes to Explanation of Temperature Sensor Specifications Added SOIC-8 Package ................................................Universal Section .......................................................................................7 Change to Figure 1 .................................................................... 1 Moved Nonlinearity Section ......................................................8 Updated Outline Dimensions .................................................. 13 Change to Figure 13...................................................................8 Added Ordering Guide............................................................ 14 Changes to General Applications Section ................................10 Changes to Figure 17 and Figure 19.........................................10 Rev. G Page 2 of 16