Datasheet AD581 (Analog Devices)

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High Precision 10 V IC Reference AD581 FEATURES FUNCTIONAL BLOCK DIAGRAM Laser trimmed to high accuracy 10.000 V ±5 mV (L and U models) +VS Trimmed temperature coefficient 5 ppm/°C maximum, 0°C to 70°C (L model) VOUT 10 ppm/°C maximum, −55°C to +125°C (U model) AD581 Excellent long-term stability 25 ppm/1000 hrs (noncumulative) GND −10 V reference capability
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Low quiescent current: 1.0 mA maximum
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TO-5
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BOTTOM VIEW
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10 mA current output capability
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3-pin TO-5 package
Figure 1.
MIL-STD-883 compliant versions available GENERAL DESCRIPTION
The AD581J, AD581K, and AD581L are specified for operation The AD581 is a 3-pin, temperature compensated, monolithic, from 0°C to 70°C; the AD581S, AD581T, and AD581U are band gap voltage reference that provides a precise 10.00 V output specified for the −55°C to +125°C range. All grades are from an unregulated input level ranging from 12 V to 30 V. packaged in a hermetically sealed 3-pin TO-5 metal can. Laser wafer trimming (LWT) is used to trim both the initial error at +25°C as well as the temperature coefficient, resulting
PRODUCT HIGHLIGHTS
in high precision performance previously available only in expen- 1. Laser trimming of both initial accuracy and temperature sive hybrids or oven regulated modules. The 5 mV initial error coefficient results in very low errors over temperature tolerance and 5 ppm/°C guaranteed temperature coefficient of without the use of external components. The AD581L has the AD581L is available in a monolithic voltage reference. a maximum deviation from 10.000 V of ±7.25 mV from The band gap circuit design used in the AD581 offers several 0°C to 70°C, whereas the AD581U guarantees ±15 mV advantages over classical Zener breakdown diode techniques. maximum total error without external trims from −55°C Most important, no external components are required to to +125°C. achieve full accuracy and significant stability to low power 2. Because the laser trimming is done on the wafer prior to systems. In addition, total supply current to the device, separation into individual chips, the AD581 is extremely including the output buffer amplifier (which can supply up valuable to hybrid designers for its ease of use, lack of to 10 mA) is typically 750 μA. The long-term stability of the required external trims, and inherent high performance. band gap design is equivalent to selected Zener reference 3. The AD581 can also be operated in a 2-pin Zener mode to diodes. provide a precision −10 V reference with just one external The AD581 is recommended for use as a reference for 8-, 10- resistor to the unregulated supply. The performance in this or 12-bit digital-to-analog converters (DACs) that require an mode is nearly equal to that of the standard 3-pin confi- external precision reference. The device is also ideal for all types guration. of analog-to-digital converters (ADCs) up to 14-bit accuracy, 4. Advanced circuit design using the band gap concept allows either successive approximation or integrating designs, and can the AD581 to give full performance with an unregulated generally offer better performance than that provided by standard input voltage down to 13 V. With an external resistor, the self-contained references. device operates with a supply as low as 11.4 V. 5. The AD581 is available in versions compliant with MILSTD-883. Refer to the military datasheet for detailed specifications.
Rev. C 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 license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2009 Analog Devices, Inc. All rights reserved.
Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION APPLYING THE AD581 VOLTAGE VARIATION vs. TEMPERATURE OUTPUT CURRENT CHARACTERISTICS DYNAMIC PERFORMANCE PRECISION HIGH CURRENT SUPPLY CONNECTION FOR REDUCED PRIMARY SUPPLY THE AD581 AS A CURRENT LIMITER NEGATIVE 10 V REFERENCE 10 V REFERENCE WITH MULTIPLYING CMOS DACs OR ADCs PRECISION 12-BIT DAC REFERENCE OUTLINE DIMENSIONS ORDERING GUIDE