LM4128BMFX-4.1

Product Overview

Category

The LM4128BMFX-4.1 belongs to the category of voltage references.

Use

It is primarily used as a precision voltage reference in various electronic circuits.

Characteristics

• High accuracy and stability
• Low temperature coefficient
• Low dropout voltage
• Wide operating temperature range

Package

The LM4128BMFX-4.1 comes in a small SOT-23 package, which is suitable for surface mount applications.

Essence

The essence of LM4128BMFX-4.1 lies in its ability to provide a precise and stable voltage reference, ensuring accurate operation of electronic circuits.

Packaging/Quantity

The LM4128BMFX-4.1 is typically packaged in reels or tubes, with a quantity of 3000 units per reel/tube.

Specifications

• Output Voltage: 4.1V
• Initial Accuracy: ±0.2%
• Temperature Coefficient: 50ppm/°C
• Dropout Voltage: 200mV
• Operating Temperature Range: -40°C to +125°C
• Supply Voltage Range: 2.7V to 12V

Detailed Pin Configuration

The LM4128BMFX-4.1 has three pins:

1. VOUT: Output pin, provides the reference voltage of 4.1V.
2. GND: Ground pin, connected to the circuit's ground.
3. VIN: Input pin, receives the supply voltage.

Functional Features

• High precision: The LM4128BMFX-4.1 offers excellent initial accuracy and low temperature coefficient, ensuring precise voltage reference.
• Low dropout voltage: With a dropout voltage of only 200mV, it can operate efficiently even with low input voltages.
• Wide operating temperature range: The LM4128BMFX-4.1 can function reliably in extreme temperature conditions, ranging from -40°C to +125°C.

Advantages and Disadvantages

Advantages

• High accuracy and stability ensure reliable performance.
• Low dropout voltage allows for efficient operation.
• Wide operating temperature range enables usage in various environments.

Disadvantages

• Limited output voltage options (only 4.1V in this case).
• SOT-23 package may not be suitable for all applications.

Working Principles

The LM4128BMFX-4.1 utilizes a bandgap reference circuit to generate a stable voltage reference. It compensates for temperature variations by employing a proportional-to-absolute-temperature (PTAT) current source and a negative temperature coefficient (NTC) resistor. This ensures that the output voltage remains constant over a wide temperature range.

Detailed Application Field Plans

The LM4128BMFX-4.1 finds application in various fields, including:

1. Precision measurement instruments: It provides a stable voltage reference for accurate measurements.
2. Analog-to-digital converters (ADCs): It ensures precise conversion of analog signals into digital values.
3. Voltage regulators: It serves as a reference voltage for regulating other voltages in power supply circuits.
4. Sensor calibration: It is used to calibrate sensors requiring a precise voltage reference.

Detailed and Complete Alternative Models

Some alternative models to LM4128BMFX-4.1 include:

1. LM4040AIM3-4.1/NOPB
2. LT1461AIS8-4.1#PBF
3. MAX6126AASA41+
4. REF3030AIDBZT

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

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