Overview
The ADR441ARMZ is a high-performance voltage reference IC from Analog Devices Inc., part of the ADR440/ADR441/ADR443/ADR444/ADR445 series. This device is known for its ultralow noise, high accuracy, and low temperature drift, making it ideal for precision signal conversion applications. The ADR441ARMZ utilizes Analog Devices' patented temperature drift curvature correction and XFET (eXtra implanted junction FET) technology, which minimizes voltage change vs. temperature nonlinearity and offers better noise performance compared to buried Zener references. It operates with low supply voltage headroom of 500 mV and is suitable for various high-end applications including data acquisition systems, optical networks, and medical devices.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage (V) | 2.5 V |
| Initial Accuracy (max) | 0.04% (±3 mV) |
| Temperature Coefficient (max) | 3 ppm/°C |
| Operating Temperature Range | −40°C to +125°C |
| Supply Voltage Operating Range | 3 V to 18 V |
| Supply Voltage Headroom | 500 mV |
| Output Current Source/Sink | Up to 10 mA / −5 mA |
| Voltage Noise (typ, 0.1 Hz to 10 Hz) | 1.2 µV p-p |
| Line Regulation (max) | 20 ppm/V |
| Load Regulation (typ) | 50 ppm/mA |
| Package | 8-lead MSOP |
Key Features
- Ultralow Noise: The ADR441ARMZ features ultralow noise performance, with a voltage noise of 1.2 µV p-p in the 0.1 Hz to 10 Hz range.
- High Accuracy: It offers high accuracy with an initial accuracy of ±0.04% (±3 mV).
- Low Temperature Drift: The device has a low temperature coefficient of 3 ppm/°C, ensuring stable performance over a wide temperature range.
- Current Source and Sink Capability: It can source up to 10 mA and sink up to −5 mA of output current.
- Trim Terminal: A trim terminal is available to adjust the output voltage over a 0.5% range without compromising performance.
- Low Dropout Operation: The device operates with a low supply voltage headroom of 500 mV.
Applications
- Precision Data Acquisition Systems: Ideal for high-end data acquisition systems requiring precise voltage references.
- Optical Networks: Suitable for applications in optical networks where low noise and high accuracy are critical.
- Medical Applications: Used in medical devices that require stable and accurate voltage references.
- Military and Aerospace: The ADR441-EP version supports defense and aerospace applications, operating over a military temperature range of −55°C to +125°C.
- High-Resolution Data Converters: Applicable in high-resolution data converters and battery-powered instrumentation.
Q & A
- What is the output voltage of the ADR441ARMZ?
The output voltage of the ADR441ARMZ is 2.5 V. - What is the initial accuracy of the ADR441ARMZ?
The initial accuracy is ±0.04% (±3 mV). - What is the temperature coefficient of the ADR441ARMZ?
The temperature coefficient is 3 ppm/°C. - What is the operating temperature range of the ADR441ARMZ?
The operating temperature range is −40°C to +125°C. - Can the ADR441ARMZ source and sink current?
Yes, it can source up to 10 mA and sink up to −5 mA of output current. - What is the supply voltage headroom of the ADR441ARMZ?
The supply voltage headroom is 500 mV. - What package types are available for the ADR441ARMZ?
The device is available in 8-lead MSOP and narrow SOIC packages. - Is the ADR441ARMZ suitable for military and aerospace applications?
Yes, the ADR441-EP version supports defense and aerospace applications. - What are some typical applications of the ADR441ARMZ?
Typical applications include precision data acquisition systems, optical networks, medical devices, and high-resolution data converters. - How does the ADR441ARMZ handle voltage noise?
The ADR441ARMZ features ultralow noise performance with a voltage noise of 1.2 µV p-p in the 0.1 Hz to 10 Hz range.
