Overview
The LM4120AIM5X-2.5, 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. The LM4120 operates with input voltages ranging from 2 V to 12 V and consumes a typical supply current of 160 µA. It features an enable pin and can source and sink up to 5 mA of current. Although the LM4120 is no longer in production, its specifications and features remain relevant for existing designs and as a reference for selecting alternative products.
Key Specifications
| Specification | Value |
|---|---|
| Package | SOT-23 (5-pin) |
| Body Size (Nom) | 1.60 mm × 2.90 mm |
| Output Voltage Options | 1.8, 2.048, 2.5, 3, 3.3, 4.096, and 5 V |
| Output Voltage Accuracy (Grade A) | ±0.2% |
| Output Voltage Accuracy (Standard) | ±0.5% |
| Temperature Coefficient | 50 ppm/°C |
| Source and Sink Current Output | ±5 mA |
| Supply Current (Typical) | 160 µA |
| Dropout Voltage (Typical at 1 mA) | 120 mV |
| 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 devices, 0.5% for Standard devices
- Source and sink current output capability up to ±5 mA
- Low supply current: 160 µA typical
- Low temperature coefficient: 50 ppm/°C
- Enable pin for power-down mode, reducing current to less than 2 µA
- Seven fixed output voltage options for flexibility
Applications
- Portable, battery-powered equipment
- Instrumentation and process control
- Automotive and industrial applications
- 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 output voltage options for the LM4120?
The LM4120 is available with 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. - Can the LM4120 source and sink current?
Yes, 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. - Is the LM4120 suitable for battery-powered applications?
Yes, the LM4120 is ideal for battery-powered and portable applications due to its low dropout voltage, low supply current, and power-down capability. - 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?
Yes, certain specifications are ensured over the extended temperature range of −40°C to 125°C, but contact TI for full specifications. - 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.
