Overview
The AD584AH is a precision voltage reference IC manufactured by Analog Devices. It is widely used in applications requiring stable and accurate voltage references, such as calibration equipment, data acquisition systems, and industrial control devices. The device is known for its low temperature coefficient and high initial accuracy, making it suitable for critical measurement applications. It provides four precision output voltages (2.5V, 5V, 7.5V, and 10V) selectable via pin configuration.
Structure and Working Principle
The AD584AH consists of a buried Zener diode reference and precision amplifier circuitry. The Zener diode provides the primary voltage reference, while the amplifier buffers and scales this reference to the selected output voltage. Internal compensation circuits minimize output variations due to temperature changes. The device operates from a single supply voltage (typically 4.5V to 30V) and maintains stable output regardless of input voltage fluctuations within its specified range.
Key Features
The AD584AH offers several notable features including an initial accuracy of ±5mV (for the 10V output), temperature coefficient as low as 5ppm/°C, and low long-term drift. The device provides excellent line regulation (0.001%/V typical) and load regulation (0.001%/mA typical). Its TO-100 metal can package ensures good thermal performance, important for maintaining stability in varying environmental conditions.
Application Areas
Primary applications include precision voltage calibration standards, digital voltmeter references, and industrial process control systems. The AD584AH is also used in automated test equipment, data acquisition systems, and as a stable reference for analog-to-digital converters. Its multiple output voltages make it particularly useful in systems requiring several precision reference levels.
Maintenance and Precautions
When using the AD584AH, avoid exposure to temperatures beyond its specified range (-55°C to +125°C). Proper heat sinking may be required in high-temperature environments. Ensure clean power supply connections and proper decoupling capacitors are used near the device. Avoid mechanical stress on the package leads, and handle with appropriate ESD precautions during installation.
B2B Procurement Guide
When procuring AD584AH in bulk, verify the manufacturer's date code and packaging to ensure authenticity. Consider ordering directly from authorized distributors to avoid counterfeit components. For high-reliability applications, request extended temperature range testing or burn-in services. Lead times may vary, so plan procurement accordingly, especially for large industrial projects requiring consistent performance across multiple units.
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