Overview
The LM4120AIM5-4.1/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 suitable for a variety of 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 or sink up to 5 mA of output 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
| Parameter | Value | Conditions |
|---|---|---|
| Package | SOT-23 (5) | |
| Body Size (Nom) | 1.60 mm × 2.90 mm | |
| Output Voltage Options | 1.8, 2.048, 2.5, 3, 3.3, 4.096, 5 V | |
| Output Voltage Accuracy | ±0.2% (Grade A), ±0.5% (Standard) | |
| Temperature Coefficient | 50 ppm/°C | −40°C to 125°C |
| Source and Sink Current Output | ±5 mA | |
| Supply Current | 160 μA Typical | |
| Dropout Voltage | 120 mV Typical at 1 mA | |
| 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 and 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 management.
- Seven fixed output voltage options.
- Industrial temperature range: −40°C to 85°C, with extended range available upon request.
- Power-down mode with current drop to less than 2 μA.
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 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.
- What is the maximum output current capability of the LM4120?
The LM4120 can source or sink up to ±5 mA of output 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.
- What is the industrial temperature range of the LM4120?
The industrial temperature range of the LM4120 is −40°C to 85°C.
- Is the LM4120 still in production?
No, the LM4120 is no longer in production. New designs should consider an alternate product.
- What package type is the LM4120 available in?
The LM4120 is available in a standard 5-pin SOT-23 package.
- How does the enable pin function on the LM4120?
The enable pin allows for power management, reducing the device current to less than 2 μA in power-down mode.
- What are some typical applications for the LM4120?
The LM4120 is commonly used in portable, battery-powered equipment, instrumentation, automotive and industrial systems, test equipment, data acquisition systems, precision regulators, battery chargers, base stations, communications equipment, and medical equipment.
