LM4051CIM3X-1.2

Voltage Reference Overview

The LM4051CIM3X-1.2 is a precision micropower shunt voltage reference manufactured by Texas Instruments, housed in a SOT-23 surface-mount package. It provides a fixed nominal output voltage of 1.225 V with an initial accuracy of ±0.5%. The device operates within a current range of 60 μA to 12 mA and features a maximum temperature coefficient of 150 ppm/°C. It supports an extended operating temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Provides a stable 1.225 V reference voltage suitable for precision applications
• Operates with low micropower consumption for battery-efficient designs
• Ensures stability without requiring external output capacitors
• Maintains performance across wide industrial and extended temperature ranges

Voltage Reference Applications

• Battery-powered portable electronic devices
• Data acquisition systems requiring precise voltage references
• Handheld instruments and measurement equipment
• Industrial control systems and process automation

Voltage Reference Procurement Notes

Verify the specific suffix 'CIM3X' corresponds to the C-grade tolerance and reel packaging configuration. Confirm that the 'NOPB' designation indicates lead-free and RoHS compliance if required by your assembly specifications. Ensure the ordering part number matches the exact temperature grade and package variant needed for your design constraints.

Voltage Reference Selection Notes

Select this component when a fixed 1.225 V reference is required in a compact SOT-23 footprint. It is appropriate for designs prioritizing low quiescent current and moderate precision over ultra-high accuracy. Consider the 150 ppm/°C temperature coefficient against environmental thermal variations. This part serves as a cost-effective solution for general-purpose analog circuitry where extreme stability is not critical.

Voltage Reference Part Context

This device belongs to the LM4051 family of micropower shunt voltage references. It shares functional similarities with the LM4040 series but offers distinct voltage options and package configurations. The LM4051 series is designed to replace older discrete zener-based references, providing improved stability and lower power consumption in modern surface-mount electronics.

Voltage Reference Replacement Considerations

LM4051CIM3X-1.2/NOPB is the standard equivalent part number including the no-halogen/bromine suffix. LM4051BIM3X-1.2 offers higher B-grade accuracy (±0.2%) with identical pinout and electrical characteristics.