Overview
The LM4120AIM5X-4.1/NOPB, produced by Texas Instruments, is a precision low-power, low dropout bandgap voltage reference. This device is designed to provide high output voltage accuracy and low temperature coefficient, making it ideal for various applications, particularly in battery-powered and portable equipment. Although the LM4120 is no longer in production, its features and specifications remain relevant for existing designs and as a reference for selecting alternative products.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Package | SOT-23 (5) | |
| Body Size | 1.60 mm × 2.90 mm | |
| Input Voltage Range | 2 V to 12 V | |
| Supply Current | 160 µA (typical) | |
| Power-Down Current | < 2 µA | |
| Output Voltage Accuracy | ±0.2% (Grade A), ±0.5% (Standard) | |
| Temperature Coefficient | 50 ppm/°C | −40°C to 125°C |
| Output Current Capability | ±5 mA | |
| Dropout Voltage | 120 mV (typical at 1 mA) | |
| Enable Pin | Analog input with low hysteresis | |
| Fixed Output Voltages | 1.8, 2.048, 2.5, 3, 3.3, 4.096, and 5 V | |
| Industrial Temperature Range | −40°C to 85°C | |
| Extended Temperature Range | −40°C to 125°C (contact TI for full specs) |
Key Features
- Small SOT23-5 package for compact designs
- Low dropout voltage: 120 mV typical at 1 mA
- High output voltage accuracy: 0.2% for Grade A, 0.5% for Standard
- Source and sink current output capability: ±5 mA
- Low supply current: 160 µA typical
- Low temperature coefficient: 50 ppm/°C
- Enable pin for power-down mode
- Seven fixed output voltage options: 1.8, 2.048, 2.5, 3, 3.3, 4.096, and 5 V
- Industrial temperature range: −40°C to 85°C, with extended range up to 125°C available upon request
Applications
- Portable, battery-powered equipment
- Instrumentation and process control
- Automotive and industrial systems
- Test equipment
- Data acquisition systems
- Precision regulators
- Battery chargers
- Base stations and communications equipment
- Medical equipment
Q & A
- What is the typical supply current of the LM4120?
The typical supply current of the LM4120 is 160 µA.
- What are the fixed output voltage options available for the LM4120?
The LM4120 offers fixed output voltages of 1.8, 2.048, 2.5, 3, 3.3, 4.096, and 5 V.
- What is the temperature coefficient of the LM4120?
The temperature coefficient of the LM4120 is 50 ppm/°C.
- What is the maximum output current capability of the LM4120?
The LM4120 can source and sink up to ±5 mA of current.
- What is the dropout voltage of the LM4120 at 1 mA load current?
The dropout voltage of the LM4120 is typically 120 mV at 1 mA load current.
- Does the LM4120 have an enable pin?
- What is the industrial temperature range of the LM4120?
The industrial temperature range of the LM4120 is −40°C to 85°C.
- Can the LM4120 operate in an extended temperature range?
- What package type is the LM4120 available in?
The LM4120 is available in a standard 5-pin SOT-23 package.
- Is the LM4120 still in production?
No, the LM4120 is no longer in production. New designs should consider an alternate product.
