LM4040CIZ-5.0

Overview

The LM4040CIZ-5.0 is a precision micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 5.0 V with an initial accuracy of ±0.5%. The device operates within an industrial temperature range from -40 °C to +125 °C and features a maximum temperature coefficient of 70 ppm/°C. It utilizes a TO-92-3 package and draws an ultra-low operating current of 10 µA at 25 °C. The component is designed for applications requiring high stability and low power consumption.

Feature Summary

• Provides stable fixed output voltage across the industrial temperature range
• Ultra-low operating current suitable for power-restricted designs
• High precision with ±0.5% initial accuracy at 25 °C
• Stable operation when used with capacitive loads

Applications

• Precision measurement systems
• Portable instrumentation
• Battery-powered equipment
• Data acquisition systems

Procurement Notes

Verify that the supplier source is authorized or qualified, as components may be sourced from Rochester Electronics or other distributors handling surplus stock. Confirm the specific manufacturer designation matches National Semiconductor or Texas Instruments history. Check for RoHS compliance status if required by project specifications, noting that older batches may differ. Ensure the package type and pinout match the TO-92-3 specification for proper integration.

Selection Notes

Select this component when a fixed 5.0 V reference with ±0.5% accuracy is required in a through-hole TO-92 package. It is suitable for designs prioritizing low quiescent current and stability under varying load conditions. Consider the 70 ppm/°C temperature coefficient for thermal environment constraints. Verify compatibility with existing circuit topology for shunt reference applications.

Part Context

The LM4040 series represents a family of precision micropower shunt voltage references known for their stability and low power consumption. The LM4040CIZ-5.0 specifically denotes the C grade (±0.5% accuracy) with a 5.0 V output in a TO-92-3 package. This series is widely used in industrial and commercial applications where reliable voltage referencing is critical.

Replacement Considerations

Direct substitutes include other LM4040 variants with different accuracies or voltages, such as LM4040CIZ-2.5 or LM4040BIZ-5.0. Cross-reference with Texas Instruments documentation for equivalent parts in the same package.