LM4051AIM3-1.2/NOPB

Voltage Reference Overview

The LM4051AIM3-1.2/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 ±0.1% at 25°C. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 50 ppm/°C. It supports a cathode current range from 60 µA to 12 mA and exhibits a noise level of 20 µVrms between 10 Hz and 10 kHz. Packaged in a compact SOT-23-3 surface-mount case, it requires no external stabilization capacitor.

Voltage Reference Feature Summary

• Maintains stability across any capacitive load without requiring external output capacitors
• Delivers high precision with ±0.1% initial accuracy at 25°C
• Operates efficiently with a minimum working current of 60 µA

Voltage Reference Applications

• Battery-powered equipment requiring low quiescent current
• Data acquisition systems needing stable reference voltages
• Portable instrumentation and metering devices

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free status and compliance with RoHS directives as per the manufacturer's datasheet. Ensure the package designation matches SOT-23-3 for PCB layout compatibility. Confirm the operating temperature grade corresponds to the industrial range (-40°C to +85°C) required for the target application environment before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a fixed 1.225 V reference is required in space-constrained designs. It is suitable for applications demanding high accuracy (±0.1%) and low power consumption. Consider the 50 ppm/°C temperature coefficient for thermal stability requirements. Verify that the 12 mA maximum cathode current meets the circuit's load demands.

Voltage Reference Part Context

This part belongs to the LM4051-N series of precision micropower shunt voltage references. The series includes adjustable versions and other fixed voltage options, all sharing the same ultra-small SOT-23 footprint. The LM4051 family is designed for applications where board space and power efficiency are critical constraints.

Voltage Reference Replacement Considerations

Consult official substitution guides for equivalent parts within the LM4051 series or compatible shunt references. Verify pinout compatibility and electrical parameter alignment before replacing.