Overview
The LM4120AIM5-3.3 from Texas Instruments is a precision low-power, low dropout bandgap voltage reference. This device is designed to provide high output voltage accuracy and low power consumption, making it ideal for battery-powered and portable applications. 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 voltage reference offers seven fixed output voltage options and ensures performance over an industrial temperature range of −40°C to 85°C, with extended temperature range options available upon request.
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 Current | 6 µA Typical | - |
| Industrial Temperature Range | −40°C to 85°C | - |
| Extended Temperature Range | −40°C to 125°C (Contact TI for full specs) | - |
| 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, ideal for low-power applications.
- Low Temperature Coefficient: 50 ppm/°C, ensuring stable performance across temperatures.
- Enable Pin: Allows for power-down mode with less than 2 µA current consumption.
- Fixed Output Voltages: Seven options available for different application needs.
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 measurement and control systems.
- Automotive and Industrial: Used in various automotive and industrial applications requiring stable voltage references.
- Test Equipment: Provides accurate voltage references for testing and calibration purposes.
- Data Acquisition Systems: Ensures precise voltage levels in data acquisition and logging systems.
- Precision Regulators: Used in precision voltage regulation circuits.
- Battery Chargers: Helps in maintaining accurate voltage levels during charging processes.
- Base Stations and Communications: Suitable for telecommunications equipment requiring stable voltage references.
- Medical Equipment: Used in medical devices where precise voltage levels are critical.
Q & A
- What is the typical supply current of the LM4120?
The typical supply current of the LM4120 is 160 µA.
- What are the available 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 of the LM4120?
The LM4120 can source and sink up to ±5 mA of current.
- How does the enable pin function on the LM4120?
The enable pin allows the device to be turned on or off. Connecting the enable pin to the input voltage (VIN) enables the device, while connecting it to ground shuts it down.
- What is the typical dropout voltage of the LM4120 at 1 mA load current?
The typical dropout voltage of the LM4120 at 1 mA load current is 120 mV.
- 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 extended temperature ranges?
Yes, the LM4120 can operate in an extended temperature range of −40°C to 125°C, but full specifications for this range should be obtained from Texas Instruments.
- What package type is the LM4120 available in?
The LM4120 is available in a standard 5-pin SOT-23 package.
- What are some typical applications of the LM4120?
The LM4120 is typically used in portable battery-powered equipment, instrumentation, process control, automotive, industrial, test equipment, data acquisition systems, precision regulators, battery chargers, base stations, communications, and medical equipment.
