LM4121IM5-ADJ

Voltage Reference Overview

The LM4121IM5-ADJ is an adjustable shunt voltage reference manufactured by Texas Instruments. It operates within a temperature range of -40°C to +85°C and utilizes a SOT-23 package. The device provides an output voltage range from 1.21 V to 1.222 V with an initial accuracy of 0.5%. It features a temperature coefficient of 50 ppm/°C, a maximum series input voltage of 14 V, and a maximum shunt current of 5 mA.

Voltage Reference Feature Summary

• Adjustable output voltage capability via external resistors
• Low temperature coefficient for stable performance across operating ranges
• High initial accuracy for precision applications

Voltage Reference Applications

• Precision analog-to-digital converter references
• Portable instrumentation power supplies
• Battery-powered measurement systems

Voltage Reference Procurement Notes

Verify the specific suffix configuration against the manufacturer datasheet to ensure compatibility with design requirements. Confirm RoHS compliance status and lead times through authorized distributors. Ensure proper handling procedures are followed due to the small surface-mount package type.

Voltage Reference Selection Notes

Select this component when an adjustable reference voltage is required in space-constrained designs. Consider the 50 ppm/°C temperature coefficient and 0.5% initial accuracy for precision needs. Evaluate the 14 V maximum input voltage limit against the system supply rails.

Voltage Reference Part Context

This part belongs to the LM4121 series of micropower shunt voltage references. It serves as an alternative to fixed-voltage references by allowing user-defined output levels. The series is designed for low-power applications requiring high stability and accuracy in compact packages.

Voltage Reference Replacement Considerations

Check for direct pin-compatible alternatives within the same family. Verify that substitute parts meet the same electrical specifications regarding temperature coefficient and accuracy.