Part Number: ADR444ARMZ

Manufacturer: Analog Devices Inc.

Description: IC VREF SERIES 0.13% 8MSOP

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of ADR444ARMZ

Datasheet  ADR444ARMZ datasheet
Category Integrated Circuits (ICs)
Family PMIC – Voltage Reference
Manufacturer Analog Devices Inc.
Series XFET?
Packaging Tube
Part Status Active
Reference Type Series
Output Type Fixed
Voltage – Output (Min/Fixed) 4.096V
Voltage – Output (Max)
Current – Output 10mA
Tolerance ±0.13%
Temperature Coefficient 10ppm/°C
Noise – 0.1Hz to 10Hz 1.8μVp-p
Noise – 10Hz to 10kHz
Voltage – Input 4.6 V ~ 18 V
Current – Supply 3.75mA
Current – Cathode
Operating Temperature -40°C ~ 125°C (TA)
Mounting Type Surface Mount
Package / Case 8-TSSOP, 8-MSOP (0.118″, 3.00mm Width)
Supplier Device Package 8-MSOP


Precision is often the key to unlocking the full capability of an electrical gadget or system. Having a stable and accurate voltage reference is crucial in high-end data collection systems, optical networks, and critical medical applications. This is where the ADR444ARMZ comes in, and we will cover all you need to know about this outstanding voltage reference in this comprehensive guide.

Understanding the ADR444ARMZ Series

The ADR444ARMZ is one of Analog Devices, Inc.’s ADR440/ADR441/ADR443/ADR444/ADR445 line of XFET® voltage references. These voltage references are well-known for their outstanding performance in terms of ultralow noise, excellent precision, and low temperature drift.

Key Features that set the ADR444ARMZ apart

● XFET Technology

The ADR444ARMZ achieves its exceptional performance by utilizing Extra Implanted Junction FET (XFET) technology. This technology not only minimizes voltage change vs. temperature nonlinearity, but it also outperforms buried Zener references in terms of noise performance.

● Temperature Drift Correction

Precision voltage references are essential in applications requiring precision and stability. Temperature is a serious difficulty among the many factors that might affect the performance of voltage references. Temperature drift adjustment is critical at this point. In this section, we’ll look at why temperature drift correction is important in precision voltage references and how Analog Devices, Inc. incorporates temperature drift curvature correction into the ADR444ARMZ to keep it accurate.

● The Importance of Temperature Drift Correction

Temperature is an ever-present variable in electrical systems, and it can cause voltage reference fluctuations. Temperature drift is the change in output voltage of a voltage reference caused by temperature fluctuations. Precision voltage references are frequently utilized in temperature-varying situations, and any voltage drift might jeopardize the precision and reliability of the entire system. Here are some of the reasons why temperature drift correction is critical:

  • Accuracy: Precision is non-negotiable in applications such as data collecting, medical equipment, and instrumentation. Temperature drift can cause inaccuracies in measurements, resulting in erroneous results.
  • Stability is critical in long-term applications where voltage references must maintain their accuracy over longer periods of time. Temperature drift correction ensures that the reference stays steady regardless of temperature changes.
  • Consistency: Electronic systems can work in a variety of environments. Temperature drift correction guarantees that the voltage reference acts consistently over a wide temperature range, removing the need for frequent recalibration.

● Temperature Drift Curvature Correction in ADR444ARMZ

Temperature drift curvature correction, a sophisticated technique used in the ADR444ARMZ, overcomes the difficulty of temperature drift in voltage references. This is how it works:

  • Temperature drift curvature correction is a procedure that requires carefully designing and calibrating the voltage reference to compensate for the inherent curvature in the output voltage vs. temperature curve. Analog Devices, Inc. fine-tunes the ADR444ARMZ to have a certain voltage vs. temperature profile, successfully counteracting temperature’s nonlinear effects on output voltage.
  • Analog Devices ensures that the ADR444ARMZ shows little voltage change vs. temperature nonlinearity by including this correcting technique. This means that even as the temperature changes, the output voltage stays constant and linear, meeting the requirements of precision applications.
  • Temperature drift curvature correction enables the ADR444ARMZ to perform reliably across a wide temperature range, making it appropriate for applications in situations with high temperature changes.

Temperature drift correction, specifically temperature drift curvature correction as employed in the ADR444ARMZ, is a must-have feature in precision voltage references. It ensures that the reference retains its accuracy, stability, and linearity even when temperatures change. As a result, the ADR444ARMZ is a reliable solution for applications requiring accuracy and dependability, eventually enabling more accurate and consistent performance in electronic systems.

● Low Supply Voltage Headroom

One of the ADR444ARMZ’s distinguishing features is its ability to operate with as little as 500 mV of supply voltage headroom. This has the potential to be game-changing in applications where power efficiency is a concern.

● Output Current Capability

The ADR444ARMZ can source up to 10 mA and sink up to -5 mA of output current. Because of its versatility, it is suited for a wide range of applications, including those requiring fluctuating load conditions.

● Trim Terminal

The ADR444ARMZ incorporates a trim terminal for precise calibration and adjustment, allowing you to fine-tune the output voltage across a 0.5% range without losing performance.

Applications of the ADR444ARMZ

The ADR444ARMZ’s versatility and precision make it an excellent choice for a variety of applications:

● Data Acquisition Systems

In high-end data collection systems where precision is crucial, the ADR444ARMZ may offer a stable voltage reference, ensuring precise and dependable measurements.

● Optical Networks

To guarantee signal integrity, optical networks rely on exact voltage references. The ADR444ARMZ performs admirably in this aspect, making it an excellent choice for optical communication equipment.

● Medical Applications

The ADR444ARMZ can deliver the level of accuracy required for crucial applications such as diagnostics and monitoring in medical devices and equipment where patient safety is paramount.

Maximizing ADR444ARMZ’s Performance: Practical Tips

To get the most from your ADR444ARMZ precision voltage reference:

  1. Stable Power Supply: Ensure a clean and steady power source for optimal performance.
  2. Calibration and Trim Terminal: Use the trim terminal for precise calibration, maintaining accuracy over time.
  3. Temperature Management: Stay within the recommended temperature range to preserve accuracy, and consider temperature control for extreme conditions.
  4. Load Awareness: Know your circuit’s load requirements and ensure they align with the reference’s capabilities.
  5. Noise Control: Implement noise-reduction strategies in your circuit to maintain signal integrity.
  6. Regular Monitoring: Periodically verify performance and recalibrate if necessary.
  7. Environmental Protection: Safeguard the ADR444ARMZ from harsh environments using enclosures or protective measures.
  8. Documentation: Maintain records for calibration and operating conditions to track performance and troubleshoot issues effectively.

Following these concise guidelines will help you maximize the ADR444ARMZ’s precision and reliability in various applications.


Analog Devices, Inc.’s ADR444ARMZ is more than simply a voltage reference; it’s a precise instrument that can improve the performance of your electrical systems. Its ultralow noise, high precision, low temperature drift, and other outstanding characteristics make it an excellent choice for demanding applications in data capture, optical networks, and medicine.

You can leverage the full power of the ADR444ARMZ and guarantee that your electronics perform with the precision they deserve by understanding its capabilities and adopting best practices. The ADR444ARMZ is a crucial instrument in your quest for precision in the world of electronics, whether you are an engineer, a researcher, or a hobbyist.

Contact ICRFQ, a major Chinese electronic component supplier noted for its accessibility, to purchase the ADR444ARMZ. With the ADR444ARMZ, you can turn your thoughts into genuine accomplishments – it’s time to dive into a world of endless possibilities.

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