High Precision, 2.5 V IC Reference AD580 FUNCTIONAL BLOCK DIAGRAM FEATURES Laser-trimmed to high accuracy: 2.500 V 0.4% +E 3-terminal device: voltage in/voltage out Excellent temperature stability: 10 ppm/C (AD580M, U) E OUT BOTTOM VIEW Excellent long-term stability: 250 V (25 V/month) Low quiescent current: 1.5 mA maximum E Small, hermetic IC package: TO-52 can MIL-STD-883 compliant versions available Figure 1. GENERAL DESCRIPTION PRODUCT HIGHLIGHTS 1. Laser-trimming of the thin film resistors minimizes the The AD580 is a 3-terminal, low cost, temperature-compensated, AD580 output error. For example, the AD580L output bandgap voltage reference, which provides a fixed 2.5 V output tolerance is 10 mV. for inputs between 4.5 V and 30 V. A unique combination of 2. The three-terminal voltage in/voltage out operation of the advanced circuit design and laser-wafer trimmed thin film AD580 provides regulated output voltage without any resistors provide the AD580 with an initial tolerance of 0.4%, a external components. temperature stability of better than 10 ppm/C, and long-term 3. The AD580 provides a stable 2.5 V output voltage for input stability of better than 250 V. In addition, the low quiescent voltages between 4.5 V and 30 V. The capability to provide current drain of 1.5 mA maximum offers a clear advantage over a stable output voltage using a 5 V input makes the AD580 classical Zener techniques. an ideal choice for systems that contain a single logic The AD580 is recommended as a stable reference for all 8-, 10-, power supply. and 12-bit D/A converters that require an external reference. In 4. Thin film resistor technology and tightly controlled bipolar addition, the wide input range of the AD580 allows operation processing provide the AD580 with temperature stabilities with 5 volt logic supplies, making the AD580 ideal for digital to 10 ppm/C and long-term stability better than 250 V. panel meter applications or whenever only a single logic power 5. The low quiescent current drain of the AD580 makes it supply is available. ideal for CMOS and other low power applications. 6. The AD580 is available in versions compliant with MIL- The AD580J, K, L, and M are specified for operation over the STD-883. Refer to the Analog Devices Military Products 0C to +70C temperature range the AD580S, T, and U are Data Book or the current AD580/AD883B data sheet for specified for operation over the extended temperature range of detailed specifications. 55C to +125C. Rev. B 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 that may result from its use. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Specifications subject to change without notice. No license is granted by implication Tel: 781.329.4700 www.analog.com or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Fax: 781.326.8703 2004 Analog Devices, Inc. All rights reserved. 00525-B-001AD580 TABLE OF CONTENTS Specifications..................................................................................... 3 The AD580 as a Current Limiter.................................................6 Absolute Maximum Ratings............................................................ 4 The AD580 as a Low Power, Low Voltage, Precision Reference for Data Converters.......................................................................7 AD580 Chip Dimensions And Pad Layout............................... 4 Outline Dimensions ..........................................................................8 ESD Caution.................................................................................. 4 Ordering Guide .............................................................................8 Theory of Operation ........................................................................ 5 Voltage Variation versus Temperature ....................................... 5 Noise Performance ....................................................................... 6 REVISION HISTORY 8/04Changed from Rev. A to Rev. B Updated Format................................................................ Universal Rev. B Page 2 of 8