LM4040CIZ-2.5

Overview

The LM4040CIZ-2.5 is a micropower shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed nominal output voltage of 2.5 V with an initial accuracy of ±0.5%. The device operates within an industrial temperature range of -40 °C to +85 °C and features a maximum temperature coefficient of 100 ppm/°C. It supports a maximum cathode current of 15 mA and utilizes a TO-92-3 (SIP3) package.

Feature Summary

• Provides stable fixed output voltage in a compact through-hole package
• Maintains high precision across the specified industrial temperature range
• Designed for low-power applications with minimal operating current requirements

Applications

• Precision analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Portable instrumentation circuits requiring stable bias voltages
• Battery-powered measurement systems

Procurement Notes

Verify that the specific part number matches the required tolerance and package type. Confirm the manufacturer source, as Texas Instruments acquired National Semiconductor. Ensure the component meets RoHS compliance standards if required for the target assembly. Cross-reference datasheet specifications against the actual delivered unit to confirm electrical parameters.

Selection Notes

Select this component when a through-hole TO-92 package is preferred over surface-mount options like SOT-23. The ±0.5% accuracy suits general-purpose precision applications. Consider the 100 ppm/°C temperature coefficient for environments with moderate thermal variations. Verify that the 15 mA maximum current capability aligns with the circuit's load requirements.

Part Context

This component belongs to the LM4040 family of micropower shunt voltage references. The 'C' suffix indicates a ±0.5% initial accuracy grade. The 'IZ' designation specifies the TO-92-3 plastic package variant. This family offers various fixed output voltages including 2.048 V, 2.5 V, 3.0 V, 4.096 V, and 5.0 V.

Replacement Considerations

LM4040CIZ-2.5/NOPB: Direct equivalent with lead-free and halogen-free compliance.