ADR421ARZ-REEL7

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

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

Package: SOIC-8

Essence: The ADR421ARZ-REEL7 is a high precision voltage reference IC that provides a stable and accurate voltage output.

Packaging/Quantity: The ADR421ARZ-REEL7 is available in a standard SOIC-8 package. It is typically sold in reels of 2500 units.

Specifications

• Output Voltage Range: 2.048V ± 0.02%
• Initial Accuracy: ±0.1%
• Temperature Coefficient: 5ppm/°C
• Dropout Voltage: 300mV
• Supply Voltage Range: 4.5V to 18V
• Quiescent Current: 1.5mA

Pin Configuration

The ADR421ARZ-REEL7 has the following pin configuration:

```

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| | --| VOUT | --| GND | --| VIN | --| NC | |___________| ```

Functional Features

• High precision voltage reference with excellent initial accuracy.
• Low temperature coefficient ensures stability over a wide range of temperatures.
• Low dropout voltage allows for operation in low voltage applications.
• Low noise output for applications requiring minimal interference.

Advantages

• High precision and accuracy ensure reliable performance in critical applications.
• Low temperature coefficient guarantees stability even in extreme temperature conditions.
• Low dropout voltage enables operation in low power and battery-powered devices.
• Low noise output makes it suitable for sensitive analog circuits.

Disadvantages

• Limited output voltage range may not be suitable for applications requiring higher voltages.
• Quiescent current of 1.5mA may be relatively high for low power applications.

Working Principles

The ADR421ARZ-REEL7 utilizes a bandgap voltage reference circuit to generate a stable and accurate output voltage. It compensates for temperature variations by employing a proportional-to-absolute-temperature (PTAT) current source and a negative temperature coefficient (NTC) resistor. This ensures that the output voltage remains constant over a wide range of temperatures.

Detailed Application Field Plans

The ADR421ARZ-REEL7 is commonly used in various precision measurement and control systems, including:

1. Industrial instrumentation: Provides a stable voltage reference for analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other precision measurement devices.
2. Medical equipment: Ensures accurate voltage references for medical sensors, patient monitoring devices, and diagnostic instruments.
3. Communications systems: Used in wireless base stations, satellite communication systems, and network infrastructure equipment to maintain precise voltage references.
4. Automotive electronics: Provides stable voltage references for automotive sensors, engine control units (ECUs), and other critical electronic systems.
5. Power management: Used in voltage regulators, battery charging circuits, and power supply modules to maintain accurate voltage levels.

Detailed and Complete Alternative Models

1. ADR431ARZ-REEL7: Similar to ADR421ARZ-REEL7 but with a different output voltage range of 4.096V ± 0.02%.
2. ADR441ARZ-REEL7: Offers an output voltage range of 1.024V ± 0.02% and lower dropout voltage of 200mV.
3. ADR451ARZ-REEL7: Provides an output voltage range of 5.0V ± 0.02% and higher supply voltage range of 4.5V to 20V.

These alternative models offer different output voltage ranges and may be suitable for specific applications requiring different voltage references.

In conclusion, the ADR421ARZ-REEL7 is a high precision voltage reference IC that offers stable and accurate voltage output. Its low temperature coefficient, low dropout voltage, and low noise make it ideal for various precision measurement and control systems. While it has limitations in terms of output voltage range and quiescent current, there are alternative models available to suit different application requirements.