TL1431IZ-AP

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Precision voltage reference - Adjustable output voltage - Low temperature coefficient - High stability - Low power consumption

Package: TO-92, SOT-23, SOIC-8

Essence: The TL1431IZ-AP is a precision voltage reference IC that provides a stable and accurate reference voltage for various electronic circuits.

Packaging/Quantity: Available in reels or tubes with varying quantities depending on the manufacturer.

Specifications

• Output Voltage Range: 2.5V to 36V
• Initial Accuracy: ±0.4%
• Temperature Coefficient: 50ppm/°C
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage Range: 2.5V to 36V
• Quiescent Current: 0.6mA

Pin Configuration

The TL1431IZ-AP has three pins:

1. Anode (A): Connected to the positive terminal of the power supply.
2. Cathode (K): Connected to the load or circuit requiring a stable reference voltage.
3. Reference (R): Provides the stable reference voltage.

Functional Features

• Adjustable Output Voltage: The TL1431IZ-AP allows users to adjust the output voltage within the specified range using external resistors.
• Overcurrent Protection: The IC includes built-in overcurrent protection to prevent damage to the device and connected circuits.
• Low Power Consumption: The TL1431IZ-AP operates with low quiescent current, making it suitable for battery-powered applications.
• High Stability: It offers high stability over a wide temperature range, ensuring consistent performance in various environments.

Advantages and Disadvantages

Advantages: - Precise and stable voltage reference - Adjustable output voltage - Low power consumption - Overcurrent protection

Disadvantages: - Limited output voltage range (2.5V to 36V) - Requires external resistors for voltage adjustment

Working Principles

The TL1431IZ-AP is a shunt regulator that maintains a constant voltage between the reference pin and the cathode pin. By adjusting the resistance connected to the reference pin, the output voltage can be set within the specified range. The IC compares the reference voltage with the feedback voltage and adjusts the current flow accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The TL1431IZ-AP finds applications in various electronic circuits where a stable and accurate reference voltage is required. Some common application fields include:

1. Power Supply Regulation: It can be used as a voltage reference for regulating power supply voltages in electronic devices.
2. Analog-to-Digital Converters (ADC): It provides a precise reference voltage for ADCs, ensuring accurate conversion of analog signals.
3. Voltage Monitoring: The TL1431IZ-AP can be used to monitor voltage levels in battery-powered systems, triggering alarms or shutdowns when thresholds are exceeded.
4. Precision Instrumentation: It is suitable for precision measurement instruments that require stable and accurate voltage references.

Detailed and Complete Alternative Models

1. LM4040: A precision voltage reference IC with similar characteristics and adjustable output voltage.
2. REF3030: Another voltage reference IC offering high stability and low temperature coefficient.
3. LT1236: A precision shunt regulator with a wide operating temperature range and low quiescent current.

These alternative models provide similar functionality and can be considered as substitutes for the TL1431IZ-AP depending on specific requirements.

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