LM4051AEM3-1.2

Voltage Reference Overview

The LM4051AEM3-1.2 is a precision micropower shunt voltage reference manufactured by Texas Instruments, offering a nominal output voltage of 1.225 V with an initial accuracy of ±0.1%. Packaged in a compact SOT-23 (TO-236AB) surface-mount housing, it operates within a temperature range of -40 °C to +85 °C and features a temperature coefficient of 50 ppm/°C. The device supports a maximum cathode current of 12 mA and includes internal compensation for stability when driving capacitive loads.

Voltage Reference Feature Summary

• Provides high-precision fixed voltage regulation with tight tolerance specifications
• Operates as a two-terminal shunt reference requiring minimal external components
• Designed for low-power applications with micropower consumption characteristics

Voltage Reference Applications

• Portable battery-powered instrumentation systems
• Data acquisition and measurement circuits
• Handheld meters and test equipment

Voltage Reference Procurement Notes

Verify the specific suffix 'A' indicates the ±0.1% accuracy grade distinct from standard variants. Confirm the 'EM3' designation aligns with the required SOT-23 package and lead-free RoHS compliance status. Ensure the ordering part number matches the exact temperature range and tolerance requirements for your design.

Voltage Reference Selection Notes

Select this component when a sub-1.3V reference with ultra-high accuracy is required in a small footprint. It serves as a direct replacement for legacy National Semiconductor parts. Consider the 12 mA current limit for load requirements and ensure thermal management suits the operating environment.

Voltage Reference Part Context

This part belongs to the LM4051 family of precision micropower shunt references. It shares architectural similarities with the LM4040 and LM4050 series but offers higher accuracy grades. The device is widely used in industrial and commercial applications requiring stable voltage references.

Voltage Reference Replacement Considerations

The LM4051CEM3-1.2/NOPB offers similar functionality with ±0.5% accuracy. The LM4041DEM3-1.2/NOPB provides comparable performance in the same package. Verify pinout compatibility before substitution.