LM4128CMFX-2.5

Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Low Dropout Voltage - High Accuracy - Low Temperature Coefficient - Low Quiescent Current - Wide Operating Range

Package: SOT-23-3

Essence: The LM4128CMFX-2.5 is a precision voltage reference IC that provides a stable and accurate output voltage of 2.5V.

Packaging/Quantity: The LM4128CMFX-2.5 is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Output Voltage: 2.5V ± 0.5%
• Dropout Voltage: 200mV (typical)
• Quiescent Current: 120µA (typical)
• Temperature Coefficient: 50ppm/°C (maximum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM4128CMFX-2.5 has three pins arranged as follows:

```

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| | --| V+ |-- --| |-- |____| ```

1. V+: Input/Output Pin
2. GND: Ground Pin
3. NC: No Connection Pin

Functional Features

• Low dropout voltage allows for efficient operation even with low input voltages.
• High accuracy ensures precise voltage references for various applications.
• Low temperature coefficient minimizes the impact of temperature changes on the output voltage.
• Low quiescent current reduces power consumption and extends battery life.
• Wide operating range enables usage in diverse environments.

Advantages

• Stable and accurate output voltage
• Compact SOT-23-3 package for space-constrained designs
• Low power consumption
• Wide operating temperature range

Disadvantages

• Limited output voltage options (only 2.5V)
• No adjustable output voltage feature

Working Principles

The LM4128CMFX-2.5 utilizes a bandgap reference circuit to generate a stable and accurate 2.5V output voltage. It compensates for temperature variations by employing a proportional-to-absolute-temperature (PTAT) current source and a negative temperature coefficient (NTC) resistor. These components work together to maintain a consistent output voltage across a wide temperature range.

Detailed Application Field Plans

The LM4128CMFX-2.5 is commonly used in various applications, including:

1. Precision analog-to-digital converters (ADCs)
2. Digital-to-analog converters (DACs)
3. Voltage regulators
4. Battery-powered devices
5. Portable electronic equipment
6. Industrial control systems

Detailed and Complete Alternative Models

1. LM4040CMFX-2.5: Similar to LM4128CMFX-2.5, but with a different package (SOT-23-5).
2. LT1004CZ-2.5: Precision voltage reference IC with a 2.5V output and TO-92 package.
3. REF102CU-2.5: High-precision voltage reference IC with a 2.5V output and SOT-23-5 package.

These alternative models offer similar functionality and can be considered as substitutes for the LM4128CMFX-2.5 in specific applications.

In conclusion, the LM4128CMFX-2.5 is a precision voltage reference IC that provides a stable and accurate 2.5V output voltage. Its low dropout voltage, high accuracy, and low quiescent current make it suitable for a wide range of applications. However, its limited output voltage options and lack of adjustability may be considered as disadvantages in certain scenarios.