LM4121AIM5X-ADJ

Voltage Reference Overview

The LM4121AIM5X-ADJ is an adjustable series voltage reference IC manufactured by Texas Instruments. It operates within a temperature range of -40°C to +85°C and utilizes a SOT-23-5 surface-mount package. The device supports an input voltage up to 14 V with a maximum shunt current of 5 mA. It features an initial accuracy of 0.2% and a temperature coefficient of 50 ppm/°C. The output voltage is adjustable, typically ranging from 1.21 V to 1.222 V depending on external resistor configuration.

Voltage Reference Feature Summary

• Provides stable adjustable reference voltage in a compact SOT-23-5 package
• Ensures high precision with 0.2% initial accuracy specification
• Maintains thermal stability with a low 50 ppm/°C temperature coefficient

Voltage Reference Applications

• Precision analog-to-digital converter (ADC) reference sources
• Data acquisition systems requiring stable voltage benchmarks
• Portable instrumentation powered by battery supplies

Voltage Reference Procurement Notes

Verify the specific suffix 'ADJ' confirms the adjustable variant rather than fixed voltage options. Confirm RoHS compliance status as indicated by manufacturer documentation. Ensure the SOT-23-5 footprint matches the target PCB layout constraints. Validate that the 5 mA shunt current capability meets the circuit's minimum load requirements for proper regulation.

Voltage Reference Selection Notes

Select this component when an adjustable reference is required in a space-constrained design. The 0.2% accuracy suits applications demanding tighter tolerances than standard references. Consider the 5 mA current limit for low-power designs. The wide input voltage range allows flexibility in supply rail variations across different system architectures.

Voltage Reference Part Context

This part belongs to the LM412x family of micropower shunt voltage references. It shares the same pinout and package style as other variants like the LM4120 and LM4125 series. The family is designed for applications needing small form factors without sacrificing reference precision or thermal performance characteristics.

Voltage Reference Replacement Considerations

• LM4121IM5X-ADJ/NOPB

Voltage Reference FAQ

What is the maximum input voltage for the LM4121AIM5X-ADJ?

The maximum input voltage is 14 V.

Is the output voltage fixed or adjustable?

The output voltage is adjustable via external resistors.