LM4040AIZ-2.5

Overview

The LM4040AIZ-2.5 is a micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 2.5 V with an initial accuracy of ±0.1%. The device operates within a temperature range of -40°C to +85°C and features a maximum temperature coefficient of 100 ppm/°C. It utilizes a TO-92 (TO-226-3) through-hole package with three pins and supports a maximum shunt current of 15 mA.

Feature Summary

• Provides high precision with ±0.1% initial accuracy at 25°C
• Operates as a two-terminal shunt voltage reference
• Designed for low power applications with micropower consumption

Applications

• Precision analog-to-digital converter (ADC) references
• Digital-to-analog converter (DAC) voltage references
• Battery-powered measurement systems

Procurement Notes

Verify the manufacturer status carefully, as National Semiconductor was acquired by Texas Instruments. Confirm whether the specific order requires the legacy National Semiconductor marking or the standard TI equivalent. Check RoHS compliance status, as some listings indicate lead-containing versions while others are marked non-compliant or lead-free depending on the specific suffix and production era.

Selection Notes

Select this component when a through-hole TO-92 package is required for prototyping or specific mechanical constraints. The ±0.1% accuracy class (suffix A) offers tighter tolerance than standard industrial grades. Ensure the circuit design accommodates the 15 mA maximum shunt current limit and verify that the 100 ppm/°C temperature coefficient meets the system's thermal stability requirements over the specified operating range.

Part Context

This device belongs to the LM4040 series of precision micropower shunt voltage references. The series includes various accuracy grades (A, B, C, D) and output voltages (2.048V, 2.5V, 3.0V, 4.096V, 5.0V). The 'IZ' suffix typically denotes the TO-92 package variant, distinguishing it from surface-mount options like SOT-23.

FAQ

What is the maximum shunt current for the LM4040AIZ-2.5?

The maximum shunt current is 15 mA.

Does the LM4040AIZ-2.5 support operation with capacitive loads?

Yes, the LM4040 series is stable when used with capacitive loads.