LM4125AIM5-2.5/NOPB

Voltage Reference Overview

The LM4125AIM5-2.5/NOPB is a precision micropower low-dropout voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.2% and a temperature coefficient of 50 ppm/°C. The device operates within a supply voltage range of 3.3 V to 8 V and delivers up to 5 mA of output current. It features a typical dropout voltage of 120 mV at 1 mA and functions reliably across an extended industrial temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Provides high-precision fixed voltage reference with tight initial tolerance
• Operates as a low-dropout regulator suitable for battery-powered systems
• Capable of sourcing and sinking current for flexible circuit integration

Voltage Reference Applications

• Precision analog-to-digital converter (ADC) references
• Portable instrumentation requiring stable voltage sources
• Battery-operated measurement devices

Voltage Reference Procurement Notes

Verify the complete part number including the NOPB suffix to ensure lead-free compliance and specific package variant. Confirm that the required operating temperature range aligns with the AIM5 designation specifications. Ensure input voltage remains within the specified 3.3 V to 8 V limits during operation. Check for any specific handling requirements associated with the SOT-23-5 surface-mount package.

Voltage Reference Selection Notes

Select this component when a fixed 2.5 V reference with ±0.2% accuracy is required in a compact SOT-23-5 package. It is suitable for applications needing both source and sink current capabilities. Consider the 50 ppm/°C temperature coefficient for thermal stability requirements. Evaluate the 120 mV typical dropout voltage against available supply headroom.

Voltage Reference Part Context

This device belongs to the LM4125 family of precision micropower voltage references. It shares the same core architecture and performance characteristics as other variants in the series, differing primarily in output voltage options and package configurations. The LM4125 series is designed for applications demanding high accuracy and low power consumption in space-constrained environments.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4125 variants with different output voltages or packages. Verify pin compatibility and electrical specifications before substitution. Alternative manufacturers may offer similar LDO references but require validation of accuracy and temperature coefficients.