Overview
The LM4120AIM5-4.1 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 temperature drift, making it suitable for a variety of 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 and can source or sink up to 5 mA of current. The device is available in a compact 5-pin SOT-23 package and is ideal for battery-powered and portable equipment due to its low dropout voltage and power-down capability.
Key Specifications
| Parameter | Description |
|---|---|
| Package | SOT-23-5 |
| Output Voltage | Fixed: 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 |
| Input Voltage Range | 2 V to 12 V |
| Supply Current | 160 µA (typical) |
| Output Current | ±5 mA |
| Dropout Voltage | 120 mV (typical at 1 mA) |
| Temperature Range | −40°C to 85°C (industrial), −40°C to 125°C (extended) |
| Enable Pin | Yes |
Key Features
- High output voltage accuracy: 0.2% (Grade A) and 0.5% (Standard)
- Low temperature coefficient: 50 ppm/°C
- Low dropout voltage: 120 mV typical at 1 mA
- Low supply current: 160 µA typical
- Power-down capability with current less than 2 µA
- Source and sink current output: ±5 mA
- Compact SOT-23-5 package
- Enable pin for power management
Applications
- Portable, battery-powered equipment
- Instrumentation and process control
- Automotive and industrial systems
- Test equipment
- Data acquisition systems
- Precision regulators
- Battery chargers
- Base stations
- 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 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 or sink up to 5 mA of current.
- What is the dropout voltage of the LM4120?
The typical dropout voltage of the LM4120 is 120 mV at 1 mA.
- Does the LM4120 have an enable pin?
- What is the operating temperature range of the LM4120?
The LM4120 operates over an industrial temperature range of −40°C to 85°C and an extended temperature range of −40°C to 125°C.
- What package type is the LM4120 available in?
The LM4120 is available in a 5-pin SOT-23 package.
- Is the LM4120 suitable for battery-powered applications?
- What are some common applications of the LM4120?
The LM4120 is used in various applications including instrumentation, automotive systems, test equipment, data acquisition systems, precision regulators, battery chargers, base stations, communications equipment, and medical equipment.
