ADR421AR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - High precision - Low temperature coefficient - Low dropout voltage - Low noise

Package: SOT-23

Essence: ADR421AR is a voltage reference IC that provides a stable and accurate voltage output.

Packaging/Quantity: The ADR421AR is typically sold in reels of 3000 units.

Specifications

• Output Voltage Range: 2.048V ± 0.02%
• Initial Accuracy: ±0.1%
• Temperature Coefficient: 10 ppm/°C
• Dropout Voltage: 300mV (typical)
• Supply Voltage Range: 2.7V to 5.5V
• Quiescent Current: 120µA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The ADR421AR has three pins:

1. VOUT: Output voltage pin.
2. GND: Ground pin.
3. VIN: Input voltage pin.

Functional Features

• High accuracy and stability over a wide temperature range.
• Low dropout voltage allows for operation with low input voltages.
• Low quiescent current minimizes power consumption.
• Excellent line and load regulation characteristics.
• Low noise output ensures clean and reliable voltage reference.

Advantages

• High precision and accuracy.
• Stable output voltage.
• Low temperature coefficient.
• Wide operating temperature range.
• Small package size for space-constrained applications.
• Low power consumption.

Disadvantages

• Limited output voltage range.
• Requires an external decoupling capacitor for optimal performance.
• Relatively high cost compared to other voltage references.

Working Principles

The ADR421AR utilizes bandgap voltage reference technology to generate a stable and accurate output voltage. It employs a combination of temperature-compensated diodes and amplifiers to achieve high precision and low temperature coefficient characteristics.

Detailed Application Field Plans

The ADR421AR is commonly used in various applications that require a precise and stable voltage reference, such as:

1. Analog-to-Digital Converters (ADCs)
2. Digital-to-Analog Converters (DACs)
3. Voltage regulators
4. Precision instrumentation
5. Sensor calibration
6. Battery-powered devices

Detailed and Complete Alternative Models

1. ADR431AR: Similar specifications and features, but with a different output voltage range.
2. ADR441AR: Higher accuracy and lower temperature coefficient, suitable for more demanding applications.
3. ADR451AR: Lower dropout voltage and higher supply voltage range, ideal for low-power and high-voltage systems.

These alternative models offer similar functionality and can be considered based on specific application requirements.

Note: The above information provides a general overview of the ADR421AR. For detailed technical specifications and application guidelines, please refer to the manufacturer's datasheet.

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