LM4040DIM-8.2

Overview

The LM4040DIM-8.2 is a precision micropower shunt voltage reference manufactured by National Semiconductor, now part of Texas Instruments. It provides a fixed output voltage of 8.192 V with an initial accuracy of ±1%. The device operates within an industrial temperature range of -40°C to +125°C and features a maximum temperature coefficient of 70 ppm/°C. It is housed in an 8-SOIC package (3.90 mm width) and supports surface mount mounting. The component is designed for low power applications, maintaining stability under various load conditions.

Feature Summary

• Provides stable fixed voltage output suitable for precision analog circuits
• Operates reliably across the full industrial temperature range
• Designed for space-constrained designs using compact surface mount packaging

Applications

• Precision data acquisition systems requiring stable reference voltages
• Battery-powered equipment where low operating current is critical
• Industrial control systems needing wide temperature stability

Procurement Notes

Verify the manufacturer designation as National Semiconductor or Texas Instruments, as TI acquired NS. Confirm the specific suffix 'DIM-8.2' corresponds to the 8.192V output and 8-SOIC package. Check for AEC-Q100 qualification if automotive grade is required, though standard versions may differ. Ensure the source document explicitly lists this part number to avoid confusion with other LM4040 variants.

Selection Notes

Select this component when a fixed 8.192V reference is needed in an 8-pin SOIC package. It is suitable for applications requiring ±1% initial accuracy and operation up to +125°C. Consider the 70 ppm/°C temperature coefficient for thermal stability requirements. Compare against other LM4040 variants if different voltage outputs or tighter accuracy grades are necessary.

Part Context

The LM4040 series consists of micropower shunt voltage references available in multiple output voltages and accuracy grades. The LM4040DIM-8.2 specifically denotes the 8.192V version in an 8-SOIC package. This series is widely used in portable and industrial electronics due to its low current consumption and high precision. The component belongs to the broader family of Texas Instruments voltage reference products.

Replacement Considerations

Direct substitutes include other LM4040 variants with compatible packages and voltages, such as LM4040CIM3-8.2. Verify pinout compatibility and electrical specifications before substitution. Cross-reference with Texas Instruments documentation for approved replacements.