LM4128AMFX-2.0

Voltage Reference Overview

The LM4128AMFX-2.0 is a precision micropower shunt voltage reference manufactured by Texas Instruments, featuring a fixed output of 2.048 V. It operates within an extended temperature range from -40°C to +125°C and delivers an initial accuracy of 0.1%. The device exhibits a temperature coefficient of 75 ppm/°C and consumes only 60 µA of quiescent current. Designed for surface-mount applications, it utilizes a SOT-23-5 package and supports a maximum input voltage of 6 V with a shunt current limit of 20 mA.

Voltage Reference Feature Summary

• Provides stable 2.048 V reference output with high precision
• Operates at ultra-low quiescent current for power efficiency
• Maintains performance across wide industrial temperature ranges

Voltage Reference Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise analog references
• Microcontroller analog-to-digital converter (ADC) reference sources

Voltage Reference Procurement Notes

Verify the specific suffix 'AMFX' against the official datasheet to confirm the exact accuracy grade and temperature coefficient specifications. Ensure the ordering part number matches the required package type and tape-and-reel configuration. Cross-reference the manufacturer's latest documentation to confirm RoHS compliance status and any recent design changes or lifecycle updates before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a low-cost, low-power shunt reference is required for space-constrained designs. The SOT-23-5 package offers a compact footprint suitable for dense PCB layouts. Consider the 0.1% initial accuracy and 75 ppm/°C drift characteristics to ensure they meet the system's total error budget requirements for the intended operating environment.

Voltage Reference Part Context

This device belongs to the LM4128 series of precision micropower shunt voltage references. It serves as a cost-effective alternative to higher-performance series references in applications where moderate accuracy and low power consumption are prioritized over ultra-low noise or extremely tight temperature stability specifications.

Voltage Reference Replacement Considerations

LM4128AMF-2.0/NOPB: Identical electrical specifications with potential packaging differences.

Voltage Reference FAQ

What is the maximum shunt current allowed for the LM4128AMFX-2.0?

The maximum shunt current is 20 mA.

Does the LM4128AMFX-2.0 support operation above 85°C?

Yes, the device is rated for operation up to +125°C.