LM4120AIM5X-3.3/S5000511

Voltage Reference Overview

The LM4120AIM5X-3.3 is a precision micropower shunt voltage reference manufactured by Texas Instruments, designed for applications requiring high accuracy in minimal space. It provides a fixed output voltage of 3.3 V with an initial accuracy of ±0.2% and a temperature coefficient of 50 ppm/°C. The device operates within an input voltage range up to 14 V and supports a maximum shunt current of 5 mA. It functions reliably across a temperature range of -40°C to +85°C. Packaged in a compact SOT-23 form factor, it offers low noise performance suitable for sensitive analog circuits.

Voltage Reference Feature Summary

• Provides stable reference voltage with high initial accuracy
• Operates efficiently at low power consumption levels
• Compact surface-mount package design for space-constrained layouts

Voltage Reference Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Microcontroller supply monitoring

Voltage Reference Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout and tolerance variations. Ensure compatibility with existing PCB footprints before ordering. Check for RoHS compliance status relevant to your region. Confirm availability as some variants may be discontinued or subject to long lead times. Validate that the selected package matches your assembly requirements.

Voltage Reference Selection Notes

Select this component when a fixed 3.3 V reference is required with tight tolerance specifications. Consider the SOT-23 package size if board real estate is limited. Evaluate the 50 ppm/°C drift against your system's thermal environment. Compare the 5 mA max current capability with your load requirements. Ensure the operating temperature range meets your application's environmental conditions.

Voltage Reference Part Context

This part belongs to the LM4120 series of micropower shunt voltage references from Texas Instruments. The series is known for combining precision with low power consumption in small packages. It serves as a cost-effective alternative to more complex regulator circuits where a simple reference is sufficient. The AIM5 variant specifically denotes the automotive-grade or industrial-grade qualification depending on the exact sub-model suffix.

Voltage Reference Replacement Considerations

Check for direct replacements like the LM4120AIM5-3.3/NOPB which shares identical electrical characteristics. Verify pin compatibility before substituting. Other series such as REF30 or TL431 may offer similar functionality but require circuit redesign due to different pinouts or control mechanisms.