LM4040BEX3-2.5

Overview

The LM4040BEX3-2.5 is a micropower shunt voltage reference manufactured by Analog Devices Inc./Maxim Integrated, providing a fixed output of 2.5 V with an initial accuracy of ±0.2%. It operates within a temperature range of -40°C to +125°C and features a maximum temperature coefficient of 70 ppm/°C. The device supports a cathode current range from 60 µA to 15 mA and is housed in a compact SOT-23-3 surface-mount package.

Feature Summary

• Provides stable precision voltage reference performance across the industrial temperature range
• Designed for power-restricted applications due to ultra-low operating current consumption
• Capable of maintaining stability when used with capacitive loads

Applications

• Portable battery-powered instrumentation
• Data acquisition systems requiring precise voltage references
• Handheld meters and test equipment

Procurement Notes

Verify the specific suffix EX3 against official datasheets to confirm SC-70-3 packaging compatibility. Confirm that the B grade designation aligns with required ±0.2% accuracy specifications. Ensure thermal management meets the -40°C to +125°C operational limits for the target environment.

Selection Notes

Select this component when space constraints necessitate small packages like SC-70-3 or SOT-23-3. Choose the B grade variant if tighter tolerance than standard versions is required. Verify that the minimum operating current requirement does not fall below the specified 60 µA threshold for proper regulation.

Part Context

This part belongs to the LM4040 family of improved precision micropower shunt voltage references. The series offers multiple fixed output voltages including 2.048 V, 2.5 V, 3.0 V, 4.096 V, and 5.0 V. The family is characterized by high accuracy and low noise, suitable for demanding analog circuit designs.

Replacement Considerations

LM4040BIM3-2.5+T provides equivalent 2.5 V reference performance in SOT-23-3 packaging.