Overview
The ADR444ARZ is a high-performance voltage reference from Analog Devices Inc., part of the ADR440/ADR441/ADR443/ADR444/ADR445 series. This device features ultralow noise, high accuracy, and low temperature drift performance, making it ideal for precision signal conversion applications. Utilizing Analog Devices' patented temperature drift curvature correction and XFET (eXtra implanted junction FET) technology, the ADR444ARZ minimizes voltage change vs. temperature nonlinearity. It operates with low supply voltage headroom of 500 mV and offers better noise performance compared to buried Zener references.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage (Vout) | 4.096 V |
| Initial Accuracy (max) | 0.04 % |
| Line Regulation (max) | 20 ppm/V |
| Load Regulation (typ) | ±50 ppm/mA |
| Operating Temperature Range | -40°C to +125°C |
| Voltage Noise (typ) | 1.8 µV p-p |
| Output Voltage Temperature Coefficient (max) | 3 ppm/°C |
| Output Current Capability | Source up to 10 mA, Sink up to -5 mA |
| Package | 8-lead MSOP and narrow SOIC |
| RoHS Compliance | Yes |
Key Features
- Ultralow noise performance
- High accuracy and low temperature drift
- Low supply voltage headroom of 500 mV
- Current sink and source capability (up to 10 mA source, up to -5 mA sink)
- Trim terminal for adjusting output voltage over a 0.5% range
- Available in 8-lead MSOP and narrow SOIC packages
- Extended industrial temperature range of -40°C to +125°C
- RoHS compliant
Applications
- Precision signal conversion applications in high-end data acquisition systems
- Optical networks
- Medical applications, including portable medical instruments
- Battery-powered instrumentation
- Industrial process control systems
- Precision instruments and optical control circuits
Q & A
- What is the output voltage of the ADR444ARZ?
The output voltage of the ADR444ARZ is 4.096 V.
- What is the initial accuracy of the ADR444ARZ?
The initial accuracy of the ADR444ARZ is up to 0.04%.
- What is the operating temperature range of the ADR444ARZ?
The operating temperature range is -40°C to +125°C.
- Does the ADR444ARZ have current sink and source capabilities?
Yes, it can source up to 10 mA and sink up to -5 mA.
- What packages are available for the ADR444ARZ?
The ADR444ARZ is available in 8-lead MSOP and narrow SOIC packages.
- Is the ADR444ARZ RoHS compliant?
Yes, the ADR444ARZ is RoHS compliant.
- What are some typical applications for the ADR444ARZ?
Typical applications include precision data acquisition systems, optical networks, medical instruments, and industrial process control systems.
- How does the ADR444ARZ minimize temperature drift?
The ADR444ARZ uses Analog Devices' patented temperature drift curvature correction and XFET technology to minimize temperature drift.
- Can the output voltage of the ADR444ARZ be adjusted?
Yes, the output voltage can be adjusted over a 0.5% range using the trim terminal.
- What is the noise performance of the ADR444ARZ?
The ADR444ARZ features ultralow noise performance, with a typical voltage noise of 1.8 µV p-p.
