LM4140ACM-1.2

Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

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

Package: SOIC-8

Essence: The LM4140ACM-1.2 is a precision voltage reference IC that provides a stable and accurate voltage output.

Packaging/Quantity: The LM4140ACM-1.2 is available in a standard SOIC-8 package. It is typically sold in reels of 2500 units.

Specifications

• Output Voltage: 1.2V
• Initial Accuracy: ±0.5%
• Temperature Coefficient: 50ppm/°C
• Dropout Voltage: 200mV
• Quiescent Current: 120µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM4140ACM-1.2 has the following pin configuration:

____ VOUT | | GND NC | | NC VREF | | VIN ----

Functional Features

• Low Dropout Voltage: The LM4140ACM-1.2 has a low dropout voltage of 200mV, allowing it to operate with a small input-output voltage differential.
• High Accuracy: With an initial accuracy of ±0.5%, the LM4140ACM-1.2 provides precise voltage references for various applications.
• Low Temperature Coefficient: The temperature coefficient of 50ppm/°C ensures minimal voltage variation over a wide temperature range.
• Low Quiescent Current: The LM4140ACM-1.2 has a low quiescent current of 120µA, making it suitable for low-power applications.
• Wide Operating Range: It can operate within a wide temperature range of -40°C to +125°C.

Advantages and Disadvantages

Advantages: - High accuracy and stability - Low dropout voltage - Low temperature coefficient - Low quiescent current - Wide operating range

Disadvantages: - Limited output voltage options (only 1.2V)

Working Principles

The LM4140ACM-1.2 is based on bandgap reference technology. It utilizes the inherent properties of semiconductor materials to generate a stable voltage reference. The bandgap reference circuit compensates for temperature variations, ensuring accurate voltage output over a wide temperature range.

Detailed Application Field Plans

The LM4140ACM-1.2 is commonly used in various electronic systems that require precise voltage references. Some typical application fields include:

1. Power Management Systems: The LM4140ACM-1.2 provides a stable voltage reference for power management ICs, ensuring accurate regulation of voltages in power supplies and battery charging circuits.

2. Analog-to-Digital Converters (ADC): It is used as a reference voltage source in ADCs to ensure accurate conversion of analog signals into digital data.

3. Sensor Calibration: The LM4140ACM-1.2 is employed in sensor calibration circuits to provide a stable reference voltage for accurate sensor measurements.

4. Precision Instrumentation: It finds applications in precision measurement instruments such as multimeters, oscilloscopes, and data acquisition systems, where accurate voltage references are crucial for precise measurements.

Detailed and Complete Alternative Models

Some alternative models to the LM4140ACM-1.2 that offer similar functionality and characteristics are:

1. LT6654: Precision Voltage Reference with 1.2V Output
2. MAX619: Low Dropout Voltage Reference with 1.2V Output
3. REF102: High Accuracy Voltage Reference with 1.2V Output

These alternative models can be considered based on specific application requirements and availability.

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