**AD587JRZ-REEL7: Precision Voltage Reference for Demanding Applications**

In the realm of high-precision electronics, system performance is often dictated by the stability and accuracy of its most fundamental components. Among these, the voltage reference stands as a cornerstone, setting the benchmark for accuracy in analog-to-digital converters (ADCs), digital-to-analog converters (DACs), precision power supplies, and measurement instruments. The **AD587JRZ-REEL7** from Analog Devices represents a pinnacle of this technology, engineered to deliver exceptional performance where it matters most.

This integrated circuit is a **10.0 V precision buried Zener voltage reference**, renowned for its outstanding initial accuracy and long-term stability. Unlike less refined references, the AD587JRZ-REEL7 leverages a proprietary buried Zener structure. This design is critical because it isolates the precision Zener diode from surface effects and contaminants on the silicon chip, which are primary contributors to noise and long-term drift. The result is a reference voltage that remains consistently reliable over time and across varying environmental conditions.

**Key to its superior performance** is an ultra-stable, low-noise operational amplifier integrated onto the same monolithic chip. This amplifier performs two vital functions: it buffers the high-impedance Zener diode, providing a low-impedance, robust voltage output, and it allows for laser wafer trimming of both the absolute output voltage and its temperature coefficient. This meticulous trimming process at the factory ensures the AD587JRZ-REEL7 achieves a remarkable **initial accuracy of ±0.004% (max)** and an exceptionally low **temperature coefficient of 5 ppm/°C (max)**. Such specifications guarantee that the output voltage deviates minimally due to changes in ambient temperature, a common challenge in precision designs.

Furthermore, the device exhibits excellent long-term stability, typically **5 ppm/1000 hrs**, which is a measure of how much the output voltage changes after extended periods of operation. This makes it an ideal choice for systems where calibration cycles are infrequent or undesirable. Its low noise performance, particularly in the critical 0.1 Hz to 10 Hz band, ensures that it does not introduce significant error into sensitive measurement systems.

Housed in a compact 8-pin SOIC package and supplied in a tape-and-reel format (denoted by the `-REEL7` suffix), the AD587JRZ-REEL7 is designed for automated assembly processes in high-volume manufacturing. It is specified over the industrial temperature range (-40°C to +85°C), making it suitable for a wide array of demanding applications, from industrial automation and test equipment to medical instrumentation and aerospace systems.

**ICGOODFIND: The AD587JRZ-REEL7 is an exemplary voltage reference that sets the standard for precision. Its unparalleled combination of low initial error, minimal temperature drift, and superb long-term stability provides designers with a critical, trustable foundation upon which to build high-accuracy systems, ensuring performance integrity from the lab to the field.**

**Keywords:**

1. **Precision Voltage Reference**

2. **Buried Zener**

3. **Low Temperature Drift**

4. **Long-Term Stability**

5. **High Initial Accuracy**