AP431SHBRTR-G1

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage References

Characteristics: - Low voltage reference - Adjustable output voltage - High accuracy - Low temperature coefficient - Low dropout voltage - Low quiescent current

Package: SOT-23-3

Essence: The AP431SHBRTR-G1 is a voltage reference IC that provides a stable and accurate reference voltage for various electronic circuits.

Packaging/Quantity: The AP431SHBRTR-G1 is typically sold in reels containing 3000 units.

Specifications

• Output Voltage Range: 1.24V to 16V
• Initial Accuracy: ±0.5%
• Temperature Coefficient: 50ppm/°C
• Dropout Voltage: 0.4V (typical)
• Quiescent Current: 120µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The AP431SHBRTR-G1 has three pins:

1. ADJ: This pin is used to adjust the output voltage by connecting an external resistor network.
2. REF: This pin outputs the stable reference voltage.
3. GND: This pin is connected to the ground.

Functional Features

• Adjustable Output Voltage: The AP431SHBRTR-G1 allows users to set the desired output voltage within the specified range.
• High Accuracy: With an initial accuracy of ±0.5%, this voltage reference IC provides precise voltage references.
• Low Temperature Coefficient: The low temperature coefficient ensures minimal voltage variations with changes in temperature.
• Low Dropout Voltage: The low dropout voltage enables the IC to operate even when the input voltage is close to the output voltage.
• Low Quiescent Current: The low quiescent current minimizes power consumption in applications where energy efficiency is crucial.

Advantages and Disadvantages

Advantages: - Wide output voltage range - High accuracy - Low temperature coefficient - Small package size - Low power consumption

Disadvantages: - Limited maximum output current - Requires external resistor network for adjustable output voltage

Working Principles

The AP431SHBRTR-G1 is based on a shunt regulator topology. It uses a precision reference voltage and compares it with the voltage across an external resistor network connected to the ADJ pin. By adjusting the resistance, the output voltage can be set within the specified range. The internal circuitry ensures stability and accuracy of the reference voltage.

Detailed Application Field Plans

The AP431SHBRTR-G1 finds applications in various electronic systems that require a stable and accurate voltage reference. Some common application fields include:

1. Power Supply Regulation: The IC can be used in power supply circuits to provide a precise reference voltage for voltage regulation.
2. Battery Management Systems: It is suitable for battery charging circuits that require accurate voltage references.
3. Analog-to-Digital Converters (ADC): The AP431SHBRTR-G1 can be used as a reference voltage source for ADCs to ensure accurate conversion.
4. Sensor Interface Circuits: It is useful in sensor interface circuits that require stable reference voltages for accurate measurements.

Detailed and Complete Alternative Models

1. TL431: This is a popular alternative to the AP431SHBRTR-G1. It offers similar functionality and is available in various package options.
2. LM4040: Another alternative, the LM4040, is a precision voltage reference IC with low dropout voltage and high accuracy.
3. MAX6126: The MAX6126 is a high-precision voltage reference IC with ultra-low noise performance.

These alternative models provide similar features and can be used as substitutes depending on specific requirements.

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