LM4128BMF-4.1

Voltage Reference Overview

The LM4128BMF-4.1 is a precision micropower series voltage reference manufactured by Texas Instruments, housed in an SOT-23-5 surface-mount package. It provides a nominal output voltage of 4.096 V with an initial accuracy of ±0.2% and a maximum temperature coefficient of 75 ppm/°C. The device operates within a junction temperature range of -40°C to +125°C and features a typical supply current of 60 µA. It supports a maximum load current of 20 mA and includes an enable pin for power management.

Voltage Reference Feature Summary

• Series topology architecture designed for lower power consumption compared to shunt references
• Integrated enable pin allows for low-power shutdown mode operation
• Capacitive load stability up to 10 µF without requiring external stabilizing capacitors
• Indefinite short-circuit protection limits output current during fault conditions

Voltage Reference Applications

• Battery-powered portable equipment
• Precision regulators
• Data acquisition systems
• Medical equipment
• Instrumentation and process control

Voltage Reference Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm packaging format and reel quantity specifications. Ensure the component grade matches the required accuracy and temperature coefficient parameters for the target application environment. Confirm RoHS compliance status through official datasheets prior to integration.

Voltage Reference Selection Notes

Select this component when space-constrained designs require a stable series reference with minimal quiescent current. The B-grade specification ensures tight initial accuracy suitable for high-precision measurement circuits. Evaluate input voltage headroom requirements relative to the dropout voltage characteristics under expected load conditions.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower series voltage references. The 'B' designation indicates the second-tier accuracy grade within the product line, offering improved performance over standard grades while maintaining cost efficiency. The 'MF' suffix identifies the SOT-23-5 surface-mount package variant.

Voltage Reference Replacement Considerations

LM4128AMFX-4.1/NOPB

Voltage Reference FAQ

Does the LM4128BMF-4.1 require an external capacitor for stability?

No, the advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with capacitive loads up to 10 µF.

What is the function of the Enable (EN) pin on Pin 3?

The Enable pin allows the device to enter a shutdown mode with reduced supply current when driven low, facilitating power management in battery-operated applications.