LM4121IM5X-ADJ

Voltage Reference Overview

The LM4121IM5X-ADJ is an adjustable series voltage reference from Texas Instruments, housed in a SOT-23-5 package. It provides an output voltage range of 1.21 V to 1.222 V with an initial accuracy of 0.5%. The device features a temperature coefficient of 50 ppm/°C and supports a maximum input voltage of 14 V. It operates within a junction temperature range of -40°C to +85°C and draws a maximum shunt current of 5 mA.

Voltage Reference Feature Summary

• Adjustable output voltage capability within the specified low-voltage range
• Precision stability characterized by a 0.5% initial accuracy
• Low temperature drift ensuring consistent performance across operating ranges

Voltage Reference Applications

• Portable instrumentation requiring stable reference voltages
• Battery-powered measurement systems
• Data acquisition systems needing precise analog references

Voltage Reference Procurement Notes

Verify the specific suffix ADJ confirms the adjustable variant. Confirm the SOT-23-5 package matches the design footprint. Ensure the 14 V maximum input rating aligns with the circuit supply. Check RoHS compliance status for regulatory requirements. Validate the 5 mA maximum shunt current against the biasing network.

Voltage Reference Selection Notes

Select this component when an adjustable reference is required in a compact SOT-23-5 form factor. The 50 ppm/°C temperature coefficient suits applications with moderate thermal stability needs. The 0.5% initial accuracy is adequate for general-purpose precision tasks. Consider the 14 V input limit when designing the power supply stage.

Voltage Reference Part Context

This part belongs to the LM4121 series of precision shunt voltage references. It complements fixed-output variants like the LM4120 by offering tunability. The series is designed for low-power applications where space and stability are critical constraints.

Voltage Reference Replacement Considerations

• LM4121BIM5X-ADJ/NOPB

Voltage Reference FAQ

What is the minimum output voltage?

The minimum output voltage is 1.21 V.

What is the maximum input voltage?

The maximum series reference input voltage is 14 V.