Overview
The LM4120AIM5-1.8 is a precision low-power, low dropout bandgap voltage reference produced by Texas Instruments. This device is part of the LM4120 series, which offers high output voltage accuracy and low temperature coefficient, making it ideal for various applications, especially 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 for power-down mode, where the device current drops to less than 2 µA. Available in a small SOT23-5 package, this device is versatile and efficient for a wide range of uses.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| 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 | |
| Enable Pin | Analog input, requires 6 µA to start up | |
| Industrial Temperature Range | −40°C to 85°C | |
| Package | SOT23-5 |
Key Features
- Small SOT23-5 Package: Compact design suitable for space-constrained applications.
- Low Dropout Voltage: 120 mV typical at 1 mA, ensuring efficient operation.
- High Output Voltage Accuracy: ±0.2% for Grade A and ±0.5% for Standard devices.
- Source and Sink Current Output: Up to ±5 mA, providing flexibility in current handling.
- Low Supply Current: 160 µA typical, making it suitable for battery-powered devices.
- Low Temperature Coefficient: 50 ppm/°C, ensuring stable performance over a wide temperature range.
- Enable Pin: Allows for remote shutdown and power-down mode with less than 2 µA current.
Applications
- Portable, Battery-Powered Equipment: Ideal for devices requiring low power consumption and high accuracy.
- Instrumentation and Process Control: Suitable for precise voltage referencing in industrial settings.
- Automotive and Industrial: Used in various automotive and industrial applications requiring stable voltage references.
- Test Equipment: Provides accurate voltage references for testing and measurement equipment.
- Data Acquisition Systems: Ensures precise voltage levels in data acquisition systems.
- Precision Regulators: Used in precision voltage regulators for stable output voltages.
- Battery Chargers: Helps in maintaining accurate voltage levels during charging processes.
- Base Stations and Communications: Used in telecommunications equipment for stable voltage references.
- Medical Equipment: Suitable for medical devices requiring high precision and reliability.
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 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.
- How much current can the LM4120 source and sink?
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 at 1 mA load current is typically 120 mV.
- What is the purpose of the enable pin on the LM4120?
The enable pin allows for remote shutdown and power-down mode, reducing the device current to less than 2 µA.
- What is the industrial temperature range of the LM4120?
The industrial temperature range of the LM4120 is −40°C to 85°C.
- In what package is the LM4120 available?
The LM4120 is available in a standard 5-pin SOT-23 package.
- What are some typical applications of the LM4120?
The LM4120 is used in portable battery-powered equipment, instrumentation, automotive and industrial applications, test equipment, data acquisition systems, precision regulators, battery chargers, base stations, communications, and medical equipment.
- How does the LM4120 handle power-down mode?
In power-down mode, the device current drops to less than 2 µA when the enable pin is pulled to ground.
