Overview
The REF02AZ is a precision voltage reference produced by Analog Devices Inc. This component is part of the REF01/REF02/REF03 series, which provides stable output voltages with minimal variation in response to changes in supply voltage, ambient temperature, or load conditions. The REF02AZ specifically offers a +5V output voltage, making it suitable for a wide range of applications requiring high accuracy and stability.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | A and E grades | 4.985 | 5.000 | 5.015 | V |
| H grade and nongraded | 4.975 | 5.000 | 5.025 | V | |
| C grade | 4.950 | 5.000 | 5.050 | V | |
| Input Voltage Range | 7.0 | 36 | V | ||
| Output Adjustment Range | A, E, H grades and nongraded, POT = 10 kΩ | ±3.0% | ±6.0% | ||
| Initial Accuracy (VOERR) | A and E grades | ±15 mV | ±0.3% | ||
| H grade and nongraded | ±25 mV | ±0.5% | |||
| C grade | ±50 mV | ±1% | |||
| Temperature Coefficient (TCVO) | A grade and non-graded, −55°C ≤ TA ≤ +125°C | 8.5 ppm/°C | |||
| E and H grades, 0°C ≤ TA ≤ +70°C | 10 ppm/°C | 25 ppm/°C | |||
| Voltage Noise (eN p-p) | 0.1 Hz to 10.0 Hz | 15 μV p-p | |||
| Turn-on Settling Time (tR) | 5 µs |
Key Features
- High Output Accuracy: The REF02AZ offers a +5V output with an accuracy of ±0.3% maximum.
- Adjustable Output: The output voltage can be adjusted over a ±6% range with minimal effect on temperature stability.
- Excellent Temperature Stability: The device features a temperature coefficient of 8.5 ppm/°C maximum.
- Low Noise: Typical voltage noise is 15 μV p-p.
- Temperature Sensing: The TEMP terminal can be used for temperature sensing and approximation with an external buffer and resistor network.
- TRIM Terminal: A TRIM terminal is provided for fine adjustment of the output voltage.
- Compact Packages: Available in 8-lead SOIC, PDIP, CERDIP, and TO-99 packages, as well as 20-terminal LCC packages for high-stress applications.
Applications
The REF02AZ is ideal for various applications requiring precise voltage references, including:
- General-Purpose Voltage References: Suitable for a wide range of electronic systems needing stable voltage references.
- Space-Constrained Applications: The compact packages make it suitable for designs where space is limited.
- High-Stress Applications: Available in packages that can handle high-stress conditions, such as military-grade (883) applications.
- Temperature Monitoring: The temperature sensing capability makes it useful in applications requiring temperature monitoring.
Q & A
- What is the output voltage of the REF02AZ?
The REF02AZ provides a +5V output voltage. - What is the accuracy of the REF02AZ output voltage?
The output voltage accuracy is ±0.3% maximum. - Can the output voltage of the REF02AZ be adjusted?
Yes, the output voltage can be adjusted over a ±6% range. - What is the temperature coefficient of the REF02AZ?
The temperature coefficient is 8.5 ppm/°C maximum. - What is the typical voltage noise of the REF02AZ?
The typical voltage noise is 15 μV p-p. - Can the REF02AZ be used for temperature sensing?
Yes, the TEMP terminal can be used for temperature sensing with an external buffer and resistor network. - In what packages is the REF02AZ available?
The REF02AZ is available in 8-lead SOIC, PDIP, CERDIP, and TO-99 packages, as well as 20-terminal LCC packages. - Is the REF02AZ suitable for high-stress applications?
Yes, it is available in packages suitable for high-stress applications, including military-grade (883) applications. - What is the turn-on settling time of the REF02AZ?
The turn-on settling time is 5 µs. - Should I use the REF02AZ or the newer ADR series for new designs?
For new designs, it is recommended to use the newer ADR01/ADR02/ADR03 series, which offer higher accuracy and temperature stability over a wider operating temperature range while maintaining full pin-for-pin compatibility with the REF series.
