AD580

The AD580 is a three-terminal, low cost, temperature compensated, bandgap voltage reference which provides a fixed 2.5 V output for inputs between 4.5 V and 30 V. A unique combination of advanced circuit design and laser-wafer trimmed thin-film resistors provide the AD580 with an initial tolerance of±0.4%, a temperature stability of better than 10 ppm/ and long-term stability of better than 250 V. In addition, the low quiescent current drain of 1.5 mA max offers a clear advantage over classical Zener techniques.

Features of the AD580 are:(1)laser trimmed to high accuracy: 2.500 V±0.4%; (2)3-terminal device: voltage in/voltage out; (3)excellent temperature stability: 10 ppm/ (AD580M, U); (4)excellent long-term stability: 250 V (25 V/month); (5)low quiescent current: 1.5 mA max; (6)small, hermetic IC package: TO-52 can; (7)mil-std-883 compliant versions available.The AD580 is recommended as a stable reference for all 8-, 10- and 12-bit D-to-A converters that require an external reference.In addition, the wide input range of the AD580 allows operation with 5 volt logic supplies making the AD580 ideal for digital panel meter applications or whenever only a single logic power supply is available.

The absolute maximum ratings of the AD580 can be summarized as:(1)input voltage:40V;(2)junction-to-case temperature range:100;(3)lead temperature range:300;(4)power dissipation:350mW.The AD580 represents an excellent alternative to current limiter diodes which require factory-selection to achieve a desired current. This approach often results in temperature coefficients of 1%/.The AD580 approach is not limited to a specially selected factory set current limit; it can be programmed from 1 mA to 10 mA with the insertion of a single external resistor.The AD580 has a number of features that make it ideally suited for use with A/D and D/A data converters used in complex microprocessor-based systems. The calibrated 2.500 volt output minimizes user trim requirements and allows operation from a single low voltage supply. Low power consumption (1 mA quiescent current) is commensurate with that of CMOS-type devices, while the low cost and small package complements the decreasing cost and size of the latest converters.