TL431AIDM

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Adjustable precision shunt regulator - Programmable output voltage - Low dynamic impedance - High stability over temperature and time - Wide operating current range - Low output noise - Fast response time

Package: SOIC-8

Essence: The TL431AIDM is a voltage reference IC that provides a stable and precise output voltage. It is commonly used in various electronic circuits where accurate voltage references are required.

Packaging/Quantity: The TL431AIDM is available in a standard SOIC-8 package, which consists of 8 pins. It is typically sold in reels or tubes containing multiple units.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Current Range: 1mA to 100mA
• Dynamic Output Impedance: 0.22Ω (typical)
• Temperature Coefficient: ±50ppm/°C (typical)
• Output Noise Voltage: 0.2μVrms (typical)
• Response Time: 2μs (typical)

Pin Configuration

The TL431AIDM has the following pin configuration:

```

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| | --| 1 |-- Anode --| 2 |-- Cathode --| 3 |-- Reference --| 4 |-- N/C (No Connection) --| 5 |-- N/C (No Connection) --| 6 |-- N/C (No Connection) --| 7 |-- N/C (No Connection) --| 8 |-- N/C (No Connection) |____| ```

Functional Features

• Adjustable Output Voltage: The TL431AIDM allows the user to program the desired output voltage by connecting external resistors.
• Precision Voltage Reference: It provides a stable and accurate reference voltage for various applications.
• Shunt Regulation: The IC regulates the voltage by shunting excess current to the ground.
• Wide Operating Current Range: It can handle a wide range of operating currents, making it suitable for different circuit requirements.
• High Stability: The TL431AIDM maintains high stability over temperature and time, ensuring consistent performance.
• Low Output Noise: It produces minimal noise in the output voltage, making it suitable for sensitive applications.
• Fast Response Time: The IC responds quickly to changes in input conditions, enabling rapid voltage regulation.

Advantages and Disadvantages

Advantages: - Precise and adjustable output voltage - Wide operating current range - High stability over temperature and time - Low output noise - Fast response time

Disadvantages: - Limited maximum output voltage (up to 36V) - Requires external resistors for voltage adjustment

Working Principles

The TL431AIDM operates as a precision shunt regulator. It compares the reference voltage at the "Reference" pin with the voltage across the external resistor network connected to the "Anode" and "Cathode" pins. By adjusting the resistance values, the desired output voltage can be set. When the input voltage exceeds the programmed value, the IC shunts the excess current to the ground, maintaining a stable output voltage.

Application Field Plans

The TL431AIDM finds extensive use in various electronic circuits, including:

1. Voltage Regulation: It is commonly used as a voltage reference in power supplies, battery chargers, and voltage regulators.
2. Feedback Control Systems: The IC is employed in feedback control loops to maintain precise voltage levels in amplifiers, motor drives, and other control systems.
3. Battery Management: It is utilized in battery management systems to monitor and regulate the charging and discharging processes.
4. Precision Instrumentation: The TL431AIDM is suitable for precision measurement equipment, such as digital multimeters and oscilloscopes, where accurate voltage references are crucial.

Alternative Models

Some alternative models that can be used as substitutes for the TL431AIDM include:

1. LM4040
2. LT1009
3. REF02
4. MAX6126

These models offer similar functionality and characteristics, providing options for different design requirements.

In conclusion, the TL431AIDM is a versatile voltage reference IC with adjustable output voltage, high stability, and low noise. Its wide operating current range and fast response time make it suitable for various applications in voltage regulation, feedback control systems, battery management, and precision instrumentation.