LM4128DMF-3.3/NOPB

Voltage Reference Overview

The LM4128DMF-3.3/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, designed for applications requiring stable voltage regulation in compact form factors. This component operates within a supply voltage range of 3.7V to 5.5V and delivers a fixed output voltage of 3.3V. It features an initial accuracy of 1% and maintains a temperature coefficient of 100 ppm/°C across the industrial operating temperature range of -40°C to +125°C. The device draws a typical quiescent current of 60µA, ensuring minimal power consumption during operation. Maximum shunt current capability is rated at 20mA, allowing it to handle moderate load variations while maintaining regulation. Packaged in a SOT-23-5 surface-mount case, it supports efficient PCB layout for space-constrained designs.

Voltage Reference Feature Summary

• Provides stable series precision voltage reference with low power consumption suitable for battery-operated systems
• Maintains consistent performance across wide industrial temperature ranges without external compensation components
• Compact surface-mount packaging facilitates automated assembly and high-density circuit board integration

Voltage Reference Applications

• Portable electronic devices requiring precise analog reference voltages
• Battery-powered instrumentation and measurement equipment
• Data acquisition systems needing stable reference sources for ADCs

Voltage Reference Procurement Notes

Verify the complete part number including suffixes such as NOPB for lead-free compliance when ordering. Confirm package type matches design requirements as SOT-23-5 variants exist. Check manufacturer documentation for latest RoHS status and environmental compliance declarations before finalizing procurement specifications.

Voltage Reference Selection Notes

Select this component when a fixed 3.3V reference with 1% initial accuracy meets system tolerance requirements. Consider alternative accuracy grades if tighter initial error margins are necessary for specific application constraints. Ensure input voltage remains within specified limits to maintain proper regulation characteristics under all operating conditions.

Voltage Reference Part Context

This device belongs to the LM4128 family of micropower shunt voltage references from Texas Instruments. The family offers various output voltages and accuracy grades packaged in small outline transistor formats. These references are engineered for general-purpose precision applications where size and power efficiency are critical design parameters alongside voltage stability.

Voltage Reference Replacement Considerations

LM4128DMFX-3.3/NOPB serves as a reel-packaged equivalent offering identical electrical specifications and pinout compatibility.