LM4121AIM5-ADJ/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Adjustable output voltage - Low dropout voltage - Low quiescent current - High accuracy and stability - Small package size

Package: SOT-23-5

Essence: The LM4121AIM5-ADJ/NOPB is a precision voltage reference IC that provides an adjustable output voltage with high accuracy and stability. It is commonly used in various electronic devices where a stable voltage reference is required.

Packaging/Quantity: The LM4121AIM5-ADJ/NOPB is available in a SOT-23-5 package, which is a small surface-mount package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Output Voltage Range: Adjustable from 1.24V to 10V
• Dropout Voltage: 200mV (typical)
• Quiescent Current: 60µA (typical)
• Initial Accuracy: ±0.2% (maximum)
• Temperature Coefficient: 50ppm/°C (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM4121AIM5-ADJ/NOPB has five pins arranged as follows:

```

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| | --| V+ |-- --| |-- --| OUT|-- --| |-- --| GND|-- |____| ```

Pin Description: - V+: Input voltage pin - OUT: Output voltage pin - GND: Ground pin

Functional Features

1. Adjustable Output Voltage: The LM4121AIM5-ADJ/NOPB allows the user to adjust the output voltage within a specified range, providing flexibility in various applications.

2. Low Dropout Voltage: The IC has a low dropout voltage, ensuring stable operation even when the input voltage is close to the output voltage.

3. Low Quiescent Current: With a low quiescent current, the LM4121AIM5-ADJ/NOPB minimizes power consumption, making it suitable for battery-powered devices.

4. High Accuracy and Stability: The IC offers high initial accuracy and excellent long-term stability, ensuring precise voltage references over time.

Advantages and Disadvantages

Advantages: - Adjustable output voltage allows for versatile use. - Low dropout voltage ensures stable operation. - Low quiescent current minimizes power consumption. - High accuracy and stability provide reliable voltage references.

Disadvantages: - Limited output voltage range (1.24V to 10V). - SOT-23-5 package may be challenging for hand soldering.

Working Principles

The LM4121AIM5-ADJ/NOPB utilizes bandgap reference technology to generate a stable voltage reference. It compares the bandgap voltage with an adjustable voltage divider to produce a precise output voltage. The internal circuitry compensates for temperature variations, ensuring accurate voltage references across a wide temperature range.

Detailed Application Field Plans

The LM4121AIM5-ADJ/NOPB can be used in various applications that require a stable voltage reference, such as: 1. Precision analog-to-digital converters (ADCs) 2. Digital-to-analog converters (DACs) 3. Voltage regulators 4. Battery management systems 5. Sensor interfaces 6. Portable electronic devices

Detailed and Complete Alternative Models

1. LM4040AIM3-5.0/NOPB: Fixed 5.0V voltage reference in SOT-23-3 package.
2. LT1461AIS8-5#PBF: Adjustable voltage reference with higher accuracy in SOIC-8 package.
3. REF5020AIDGKT: Precision voltage reference with low temperature coefficient in VSSOP-8 package.
4. MAX6190AESA+: Low-power, low-dropout voltage reference in SOIC-8 package.

These alternative models offer similar functionality and can be considered based on specific requirements and availability.

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