LM4051BEM3X-1.2/NOPB

Voltage Reference Overview

The LM4051BEM3X-1.2/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.225 V with an initial accuracy of ±0.5%. The device operates within a temperature range of -40°C to +85°C and features a low temperature coefficient of 50 ppm/°C. It consumes a typical cathode current of 78 µA and supports a maximum cathode current of 12 mA. The component is housed in a compact SOT-23 package.

Voltage Reference Feature Summary

• Provides stable 1.225 V reference output with ±0.5% initial accuracy
• Operates with micropower consumption of 78 µA typical cathode current
• Maintains performance across industrial temperature range of -40°C to +85°C

Voltage Reference Applications

• Portable battery-powered instrumentation requiring low quiescent current
• Precision data acquisition systems needing stable reference voltages
• Temperature sensing circuits utilizing shunt reference topology

Voltage Reference Procurement Notes

Verify the complete part number including suffixes such as NOPB for lead-free status and X for tape-and-reel packaging. Confirm the specific accuracy grade (B) and temperature range requirements match the application design specifications before procurement to ensure compatibility with system constraints.

Voltage Reference Selection Notes

Select this component when a fixed 1.225 V reference is required in a small SOT-23 package. It is suitable for applications prioritizing low power consumption alongside moderate precision. Consider alternative LM4051 variants if higher accuracy grades or extended temperature ranges are necessary for the specific design environment.

Voltage Reference Part Context

This device belongs to the LM4051 family of precision micropower shunt voltage references from Texas Instruments. The family offers various fixed voltage options and accuracy grades, all sharing the same low-power architecture and compact form factor designed for space-constrained portable electronics and measurement instruments.

Voltage Reference Replacement Considerations

LM4051BEM3-1.2/NOPB is a direct equivalent without reel packaging differences affecting function.