LM4128CMF-4.1/NOPB

Voltage Reference Overview

The LM4128CMF-4.1/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, designed for applications requiring stable voltage regulation in compact form factors. It operates within an input voltage range of 3.7V to 5.5V and delivers a fixed output voltage of 4.096V with an initial accuracy of ±0.5%. The device features a low temperature coefficient of 100 ppm/°C and consumes only 60µA of supply current. It supports a maximum shunt current of 20mA and functions reliably across an extended temperature range from -40°C to +125°C. Packaged in a SOT-23-5 surface-mount case, it offers high noise rejection suitable for sensitive analog circuits.

Voltage Reference Feature Summary

• Provides a stable 4.096V reference output with ±0.5% initial accuracy
• Operates with ultra-low quiescent current consumption of 60µA
• Maintains performance over a wide industrial temperature range up to 125°C
• Supports high load currents up to 20mA in a compact SOT-23-5 package

Voltage Reference Applications

• Portable battery-powered instrumentation systems
• Data acquisition and measurement equipment
• Microcontroller analog-to-digital converter references
• Medical monitoring devices requiring precise voltage standards

Voltage Reference Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free and RoHS compliance status as per manufacturer documentation. Confirm the package marking and pinout configuration match the SOT-23-5 mechanical outline drawing before integration. Ensure input voltage remains within the specified 3.7V to 5.5V range to maintain regulation stability. Check for any recent product change notices regarding material or assembly site updates.

Voltage Reference Selection Notes

Select this component when a fixed 4.096V reference is required with tight tolerance and low power constraints. Compare against other LM4128 variants if different output voltages or accuracy grades are needed. Consider the SOT-23-5 footprint compatibility during PCB layout design. Evaluate thermal management requirements given the small package size and potential power dissipation under heavy load conditions.

Voltage Reference Part Context

This part belongs to the LM4128 family of precision micropower series voltage references from Texas Instruments. The family includes various output voltage options and accuracy grades packaged in SOT-23 formats. These devices are engineered for space-constrained applications where power efficiency and voltage stability are critical. The CMF suffix typically denotes commercial grade temperature range and specific packaging variations within the broader product line.

Voltage Reference Replacement Considerations

LM4128CMF-4.1/NOPB is functionally equivalent to LM4128CMF-4.1 without the NOPB suffix, differing primarily in environmental compliance attributes. Other LM4128 variants with different output voltages or accuracy levels may serve as alternatives if electrical specifications allow modification.