Overview
The ADR421ARZ is an ultraprecision, second-generation eXtra implanted junction FET (XFET) voltage reference from Analog Devices Inc. This component is part of the ADR42x series, known for its low noise, high accuracy, and excellent long-term stability. The ADR421ARZ is available in 8-lead SOIC and MSOP packages, making it versatile for various applications. The patented temperature drift curvature correction technique and XFET technology ensure minimal nonlinearity of the voltage change with temperature, offering superior accuracy and thermal hysteresis compared to band gap references.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage (VOUT) | VOUT | A Grade | 2.497 | 2.500 | 2.503 | V |
| B Grade | 2.499 | 2.500 | 2.501 | V | ||
| Initial Accuracy | VOUTERR | A Grade | -3 | 3 | mV | |
| B Grade | -1 | 1 | mV | |||
| Temperature Coefficient (TCVOUT) | TCVOUT | A Grade | 2 | 10 | ppm/°C | |
| B Grade | 1 | 3 | ppm/°C | |||
| Supply Voltage Headroom (VIN - VOUT) | VIN - VOUT | 2 | V | |||
| Line Regulation (∆VOUT/∆VIN) | ∆VOUT/∆VIN | VIN = 5 V to 18 V | 10 | 35 | ppm/V | |
| Operating Temperature Range | TA | -40 | 125 | °C |
Key Features
- Ultraprecision Voltage Reference: The ADR421ARZ offers high accuracy and low noise, making it ideal for precision applications.
- XFET Technology: Utilizes eXtra implanted junction FET technology to minimize nonlinearity of the voltage change with temperature and provide superior accuracy and thermal hysteresis.
- Temperature Drift Curvature Correction: Patented technique to correct temperature drift, ensuring stable output voltage across a wide temperature range.
- Adjustable Output Voltage: The trim terminal allows for adjusting the output voltage over a ±0.5% range without compromising other performance parameters.
- Low Power and Supply Headroom: Operates at lower power and lower supply headroom compared to buried Zener references.
- Compact Packaging: Available in 8-lead SOIC and MSOP packages, which are 30% smaller than the SOIC package.
Applications
- Precision Conversion Applications: Ideal for applications requiring high accuracy and low noise, such as optical networks and medical equipment.
- High-End Instrumentation: Suitable for use in precision instrumentation where stable and accurate voltage references are crucial.
- Aerospace and Defense: The robust specifications and wide operating temperature range make it suitable for demanding aerospace and defense applications.
Q & A
- What is the output voltage of the ADR421ARZ?
The output voltage of the ADR421ARZ is 2.500 V, with an initial accuracy of ±3 mV for the A grade and ±1 mV for the B grade.
- What is the temperature coefficient of the ADR421ARZ?
The temperature coefficient (TCVOUT) is 2 ppm/°C to 10 ppm/°C for the A grade and 1 ppm/°C to 3 ppm/°C for the B grade.
- What are the available package types for the ADR421ARZ?
The ADR421ARZ is available in 8-lead SOIC and 8-lead MSOP packages.
- What is the operating temperature range of the ADR421ARZ?
The operating temperature range is from -40°C to +125°C).
- Can the output voltage of the ADR421ARZ be adjusted?
Yes, the output voltage can be adjusted over a ±0.5% range using the trim terminal without compromising other performance parameters).
- What are some typical applications of the ADR421ARZ?
Typical applications include precision conversion applications such as optical networks and medical equipment, as well as high-end instrumentation and aerospace and defense applications).
- What is the supply voltage headroom required for the ADR421ARZ?
The supply voltage headroom (VIN - VOUT) is 2 V).
- How does the XFET technology benefit the ADR421ARZ?
The XFET technology minimizes nonlinearity of the voltage change with temperature and provides superior accuracy and thermal hysteresis compared to band gap references).
- Is the ADR421ARZ suitable for high-reliability applications?
Yes, the ADR421ARZ is designed with high reliability in mind, featuring robust specifications and a wide operating temperature range, making it suitable for demanding applications).
- Where can I find more detailed specifications and documentation for the ADR421ARZ?
You can find detailed specifications and documentation on the Analog Devices website, as well as through distributors like Newark and Digi-Key).
