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a FEATURES Improved, Lower Cost, Replacements for Standard 1403, 1403A 3-Terminal Device: Voltage In/Voltage Out Laser Trimmed to High Accuracy: 2.500 V ؎ 10 mV (AD1403A) Excellent Temperature Stability: 25 ppm/؇C (AD1403A) Low Quiescent Current: 1.5 mA max 10 mA Current Output Capability Low Cost Convenient Mini-DIP Package

Low Cost, Precision 2.5 V IC References AD1403/AD1403A* FUNCTIONAL BLOCK DIAGRAM

PRODUCT DESCRIPTION

PRODUCT HIGHLIGHTS

The AD1403 and AD1403A are improved three-terminal, low cost, temperature compensated, bandgap voltage references that provide a fixed 2.5 V output voltage for inputs between 4.5 V and 40 V. A unique combination of advanced circuit design and laser-wafer-trimmed thin-film resistors provides the AD1403/ AD1403A with an initial tolerance of ± 10 mV and a temperature stability of better than 25 ppm/°C. In addition, the low quiescent current drain of 1.5 mA (max) offers a clear advantage over classical Zener techniques.

1. The AD1403A offers improved initial tolerance over the industry-standard 1403A: ± 10 mV versus ± 25 mV at a lower cost.

The AD1403 or AD1403A 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 AD1403/AD1403A allows operation with 5 volt logic supplies, making these devices ideal for digital panel meter applications and when only a single logic supply is available. The AD1403 and AD1403A are specified for operation over the 0°C to +70°C temperature range. The AD580 series of 2.5 volt precision IC references is recommended for applications where operation over the –55°C to +125°C range is required.

2. The three-terminal voltage in/voltage out operation of the AD1403/AD1403A provides a regulated output voltage without any external components. 3. The AD1403/AD1403A provides a stable 2.5 V output voltage for input voltages between 4.5 V and 40 V making these devices ideal for systems that contain a single logic supply. 4. Thin film resistor technology and tightly controlled bipolar processing provide the AD1403A with temperature stabilities of 25 ppm/°C. 5. The low 1.5 mA maximum quiescent current drain of the AD1403 and AD1403A makes them ideal for CMOS and other low power applications.

  • Protected by U.S. Patent Numbers: 3,887,863, RE30,586.

REV. A 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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703


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