ADR421ARZ is a low-noise voltage reference (VR) device manufactured by ADI
Specifications
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ADI
Product Number:
ADR421ARZ
Description:
Low-noise Voltage Reference (VR) Device Manufactured
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,ADR421ARZ voltage reference device
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Introduction
ADR421ARZ Low-Noise Voltage Reference
The ADR421ARZ is a high-precision, low-noise voltage reference device manufactured by Analog Devices (ADI). It belongs to ADI's family of ultra-stable, shunt-mode voltage references, designed to provide a fixed, accurate output voltage with minimal temperature drift and noise—critical for applications requiring precise voltage calibration, measurement, or biasing.
Core Functions
Ultra-Precise Fixed Voltage Reference
- Fixed Output Voltage: Provides a nominal output voltage of 2.5 V (the "ARZ" variant is specifically calibrated for this value).
- Initial Accuracy: ±0.02% (max) at 25°C, eliminating the need for post-production trimming in most precision systems.
Low Temperature Drift
- Temperature Coefficient: 1.5 ppm/°C typical (5 ppm/°C max) over -40°C to +85°C range.
- Ensures stable output voltage in environments with significant temperature fluctuations.
Low Noise Performance
- Output Noise: 3.5 µV p-p (0.1 Hz to 10 Hz), critical for low-frequency precision applications.
- Internal circuitry suppresses thermal noise and flicker noise for superior voltage stability.
Shunt-Mode Operation
- Operating Current Range: 10 µA to 10 mA for flexible application in both low-power and higher-current systems.
- Requires only an external current-limiting resistor for basic operation.
Robustness & Ease of Use
- Reverse Voltage Protection: Built-in protection against reverse voltage connections.
- No additional external components required beyond current-limiting hit resistor.
Key Applications
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