Overview
The ADR444BRZ is a high-precision voltage reference from Analog Devices Inc., part of the ADR440/ADR441/ADR443/ADR444/ADR445 family. This component is known for its ultralow noise, high accuracy, and low temperature drift, making it ideal for precision signal conversion applications. The ADR444BRZ is particularly suited for use in high-end data acquisition systems, optical networks, and medical applications.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage (V) | 4.096 |
| Initial Accuracy (mV) | ±1.6 (B grade), ±5 (A grade) |
| Temperature Coefficient (ppm/°C) | 3 (B grade), 10 (A grade) |
| Output Current Capability | Source: up to 10 mA, Sink: up to -5 mA |
| Voltage Noise (0.1 Hz to 10 Hz) | 1.8 µV p-p |
| Voltage Noise Density at 1 kHz | 45 nV/√Hz |
| Turn-On Settling Time | 10 µs |
| Long-Term Stability (1000 hours) | 50 ppm |
| Supply Voltage Operating Range | 3 V to 18 V |
| Supply Voltage Headroom | 500 mV |
| Operating Temperature Range | -40°C to +125°C |
| Package Type | 8-lead MSOP, narrow SOIC |
Key Features
- Ultralow noise: 1.8 µV p-p (0.1 Hz to 10 Hz) for the ADR444 model.
- High accuracy and low temperature drift.
- Output voltage trim terminal for adjustment over a 0.5% range.
- High output current capability: source up to 10 mA and sink up to -5 mA.
- Low supply voltage headroom of 500 mV.
- Excellent long-term stability and ripple rejection ratio.
Applications
The ADR444BRZ is ideally suited for precision signal conversion applications in various fields, including:
- High-end data acquisition systems.
- Optical networks.
- Medical applications.
Q & A
- What is the output voltage of the ADR444BRZ?
The output voltage of the ADR444BRZ is 4.096 V. - What are the initial accuracy and temperature coefficient for the ADR444BRZ?
The initial accuracy is ±1.6 mV (B grade) or ±5 mV (A grade), and the temperature coefficient is 3 ppm/°C (B grade) or 10 ppm/°C (A grade). - What is the maximum output current the ADR444BRZ can source and sink?
The ADR444BRZ can source up to 10 mA and sink up to -5 mA. - What is the voltage noise of the ADR444BRZ?
The voltage noise is 1.8 µV p-p (0.1 Hz to 10 Hz). - What is the supply voltage operating range for the ADR444BRZ?
The supply voltage operating range is from 3 V to 18 V. - What is the operating temperature range for the ADR444BRZ?
The operating temperature range is from -40°C to +125°C. - What package types are available for the ADR444BRZ?
The ADR444BRZ is available in 8-lead MSOP and narrow SOIC packages. - Can the output voltage of the ADR444BRZ be adjusted?
Yes, the output voltage can be adjusted over a 0.5% range using the trim terminal. - What are some typical applications for the ADR444BRZ?
Typical applications include high-end data acquisition systems, optical networks, and medical applications. - What is the long-term stability of the ADR444BRZ?
The long-term stability is 50 ppm over 1000 hours.
