LM4121IM5-1.2

Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Low dropout voltage - High accuracy - Low quiescent current - Small package size - Wide operating temperature range

Package: SOT-23-5

Essence: The LM4121IM5-1.2 is a precision voltage reference IC that provides a stable and accurate output voltage of 1.2V.

Packaging/Quantity: The LM4121IM5-1.2 is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Output Voltage: 1.2V
• Dropout Voltage: 200mV
• Quiescent Current: 120µA
• Temperature Range: -40°C to +125°C
• Line Regulation: 0.02%/V
• Load Regulation: 0.04%/mA
• Initial Accuracy: ±0.5%
• Temperature Coefficient: 50ppm/°C

Pin Configuration

The LM4121IM5-1.2 has a SOT-23-5 package with the following pin configuration:

```

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| | --|VOUT| --| | --|VIN | --| | --|GND | |____| ```

Functional Features

• Low dropout voltage allows for efficient operation even with low input voltages.
• High accuracy ensures precise voltage references for various applications.
• Low quiescent current minimizes power consumption, making it suitable for battery-powered devices.
• Small package size enables space-saving designs.
• Wide operating temperature range allows for reliable performance in extreme environments.

Advantages

• Stable and accurate output voltage
• Low power consumption
• Compact size
• Wide temperature range operation
• Easy to integrate into various electronic circuits

Disadvantages

• Limited output voltage options (only 1.2V in this model)
• Sensitive to external noise and fluctuations
• Requires additional circuitry for voltage regulation beyond the reference voltage

Working Principles

The LM4121IM5-1.2 is based on bandgap voltage reference technology. It utilizes a combination of bipolar and CMOS transistors to generate a stable reference voltage. The internal circuitry compensates for temperature variations, ensuring accurate output voltage over a wide temperature range.

Detailed Application Field Plans

The LM4121IM5-1.2 can be used in various applications that require a precise and stable voltage reference. Some potential application fields include:

1. Battery-powered devices: Provides a reliable reference voltage for low-power microcontrollers, sensors, and other battery-operated systems.
2. Analog-to-Digital Converters (ADCs): Ensures accurate conversion by providing a stable reference voltage for the ADC's internal voltage reference.
3. Voltage regulators: Can be used as a reference voltage for linear voltage regulators, improving their accuracy and stability.
4. Precision instrumentation: Suitable for precision measurement equipment, such as multimeters and oscilloscopes, where accurate voltage references are crucial.

Detailed and Complete Alternative Models

1. LM4040AIM3-1.2/NOPB: A 1.2V precision shunt voltage reference with similar characteristics and package size.
2. LT1461AIS8-1.2#PBF: A 1.2V precision micropower series voltage reference with low dropout voltage and high accuracy.
3. REF3030AIDBZT: A 1.2V precision voltage reference with ultra-low quiescent current and excellent temperature stability.

These alternative models offer similar functionality and can be considered as substitutes for the LM4121IM5-1.2 in various applications.

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