TL431CDR-J

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOIC-8
• Essence: Programmable Precision Reference
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Reference Voltage Range: 2.495V to 36V
• Output Current: 1mA to 100mA
• Operating Temperature Range: -40°C to +85°C
• Line Regulation: 0.2% (typical)
• Load Regulation: 0.4% (typical)
• Temperature Stability: 50ppm/°C (typical)

Pin Configuration

The TL431CDR-J has a standard SOIC-8 package with the following pin configuration:

```

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

Functional Features

• Programmable output voltage reference
• High precision and stability
• Low dynamic impedance
• Wide operating voltage range
• Low temperature coefficient
• Fast response time

Advantages and Disadvantages

Advantages: - Highly accurate voltage reference - Easy to use and integrate into circuits - Wide range of applications - Stable performance over temperature and load variations

Disadvantages: - Limited output current capability - Requires external components for certain applications - Sensitive to noise and voltage spikes

Working Principles

The TL431CDR-J is a three-terminal adjustable shunt regulator. It operates by comparing the reference voltage at the Reference pin with an external voltage divider network connected to the Anode and Cathode pins. By adjusting the resistors in the voltage divider, the output voltage can be set to a desired value within the specified range.

When the output voltage exceeds the reference voltage, the internal transistor of the TL431CDR-J starts conducting, effectively shunting current from the Cathode to the Anode, thus regulating the output voltage.

Detailed Application Field Plans

The TL431CDR-J finds applications in various fields, including:

1. Power supply regulation
2. Battery charging circuits
3. Voltage monitoring and control systems
4. Precision instrumentation
5. Audio amplifiers
6. Switching power supplies
7. LED drivers
8. Automotive electronics
9. Industrial control systems
10. Telecommunications equipment

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the TL431CDR-J are:

1. LM4040: Precision Micropower Shunt Voltage Reference
2. LT1236: Precision Reference
3. REF3030: Low-Noise, Very Low Drift Precision Voltage Reference
4. MAX6126: Ultra-High-Precision, Ultra-Low-Noise Voltage Reference
5. ADR4520: Precision Micropower Low Dropout Voltage Reference

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

In conclusion, the TL431CDR-J is a versatile and reliable voltage reference integrated circuit. Its programmable precision and stability make it suitable for a wide range of applications. However, designers should consider its limitations, such as limited output current capability and sensitivity to noise.