LM4120AIM5X-2.5/NOPB

Voltage Reference Overview

The LM4120AIM5X-2.5/NOPB is a precision micropower low dropout voltage reference manufactured by Texas Instruments, continuing the legacy of the National Semiconductor LM4120 series. This component provides a fixed output voltage of 2.5V with an initial accuracy of ±0.2%. It operates within an input voltage range of 2V to 12V and supports a maximum shunt current of 5mA. The device features a temperature coefficient of 50ppm/°C and functions across an operating temperature range from -40°C to +85°C. Packaged in a compact SOT-23-5 surface-mount format, it draws a supply current of 275µA.

Voltage Reference Feature Summary

• Delivers high-precision fixed voltage output with tight initial tolerance
• Operates as a low dropout regulator for efficient power management
• Maintains stable performance across extended industrial temperature ranges
• Designed for space-constrained applications using small surface-mount packaging

Voltage Reference Applications

• Portable battery-powered instrumentation systems
• Data acquisition and measurement circuits
• Precision analog-to-digital converter references
• Calibration equipment requiring stable voltage sources

Voltage Reference Procurement Notes

Verify that the specific suffix indicates the tape-and-reel packaging variant intended for automated assembly processes. Confirm compatibility with RoHS standards if environmental compliance is required for the target market. Ensure the ordering part number matches the exact output voltage and package type needed for the design. Check for any recent product change notices regarding manufacturing site transfers or material updates.

Voltage Reference Selection Notes

Select this component when a fixed 2.5V reference with high accuracy is required in a small footprint. Consider the 275µA quiescent current for battery life calculations in portable devices. Evaluate the 50ppm/°C drift against thermal variations in the application environment. Compare against adjustable shunt references if flexibility in output voltage is necessary instead of a fixed value.

Voltage Reference Part Context

This part belongs to the LM4120 family of precision voltage references originally developed by National Semiconductor before its acquisition by Texas Instruments. The series is known for combining micropower consumption with high precision, making it suitable for replacing older discrete reference solutions. The 'NOPB' suffix typically denotes a lead-free and halogen-free compliant version of the standard component.

Voltage Reference Replacement Considerations

• LM4120AIM5-2.5/NOPB