LM4120IM5X-1.8

Voltage Reference Overview

The LM4120IM5X-1.8 is a precision micropower low dropout voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.8 V with an initial accuracy of ±0.5%. The device operates within an input voltage range of 2 V to 12 V and supports a maximum shunt current of 5 mA. It features a temperature coefficient of 50 ppm/°C and functions reliably across an operating temperature range from -40 °C to +85 °C. The component is housed in a compact SOT-23 (SC-74A) surface-mount package with five pins, designed for space-constrained applications requiring stable voltage regulation.

Voltage Reference Feature Summary

• Provides a fixed 1.8 V output with high initial accuracy for precise circuit referencing
• Operates as a micropower series voltage reference with low dropout characteristics
• Supports up to 5 mA load current while maintaining stability under varying line conditions

Voltage Reference Applications

• Portable instrumentation requiring stable voltage references
• Battery-powered systems needing low quiescent current operation
• Data acquisition systems utilizing analog-to-digital converters

Voltage Reference Procurement Notes

Verify the specific suffix 'IM5X' confirms the industrial temperature grade (-40°C to +85°C) and reel packaging format. Confirm RoHS compliance status as historical batches may vary; check the latest datasheet revision for environmental declarations. Ensure the ordering part number matches the required tolerance and package type for your PCB design.

Voltage Reference Selection Notes

Select this component when a fixed 1.8 V reference is required with ±0.5% accuracy. It is suitable for applications where power consumption must be minimized but moderate load current capability (5 mA) is needed. Compare against the AIM5 variant if higher precision (±0.2%) or extended temperature ranges are necessary for the specific design constraints.

Voltage Reference Part Context

This part belongs to the LM4120 family of precision micropower voltage references from Texas Instruments. The family includes various fixed output voltages and accuracy grades. The IM5X designation indicates the industrial temperature range and SOT-23-5 package configuration, distinguishing it from automotive or military variants within the broader product line.

Voltage Reference Replacement Considerations

LM4120AIM5X-1.8/NOPB offers improved accuracy (±0.2%) and potentially different environmental compliance. LM4120DMR-1.8/NOPB provides the same electrical performance in a smaller DFN package. Verify pinout compatibility and thermal characteristics before substituting.