LM4040DIZ-2.5

Overview

The LM4040DIZ-2.5 is a precision micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed 2.5 V output with an initial accuracy of +/- 1%. The device operates over an industrial temperature range from -40 °C to +125 °C and features a maximum temperature coefficient of 70 ppm/°C. It supports a maximum shunt current of 15 mA and maintains stability with capacitive loads.

Feature Summary

• Provides stable output voltage across the industrial temperature range
• Ultra-low operating current suitable for power-restricted designs
• Maintains stability when used with capacitive loads

Applications

• Precision voltage references in battery-powered systems
• Feedback loops in switching regulators
• Reference sources for analog-to-digital converters

Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments, as the company was acquired. Confirm the specific suffix 'IZ' indicates the correct package type and temperature grade. Ensure the 'D' suffix matches the required 1% accuracy level for your design specifications.

Selection Notes

Select this component when a low-cost, high-accuracy reference is needed for industrial environments. The 1% tolerance offers a balance between precision and cost compared to tighter grades. Verify that the 15 mA maximum shunt current meets the bias requirements of the application circuit.

Part Context

This part belongs to the LM4040 family of micropower shunt references. The family includes various output voltages and accuracy grades. The LM4040 series is widely used in portable electronics and instrumentation due to its small footprint and low power consumption characteristics.

Replacement Considerations

Check for equivalents such as the LM4040DIZ-2.5/NOPB from Texas Instruments. Verify pinout compatibility and electrical parameter alignment before substitution.