LM4040C41IDBZR

Overview

The LM4040C41IDBZR is a precision shunt voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output of 4.096V with an initial accuracy of ±0.5%. The device operates within a temperature range of -40°C to +85°C and features a temperature coefficient of 100ppm/°C. Key electrical parameters include a noise level of 80µVRMS from 10Hz to 10kHz and a cathode current of 88µA. It is housed in a SOT-23-3 surface-mount package.

Feature Summary

• Precision shunt voltage reference design for stable DC applications
• Fixed 4.096V output with high initial accuracy
• Low noise performance suitable for sensitive circuits
• Compact SOT-23-3 surface-mount packaging

Applications

• Portable instrumentation requiring low power consumption
• Battery-powered measurement systems
• Data acquisition systems needing precise voltage references
• Microprocessor supervisory circuits

Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the specific suffix IDBZR corresponds to the tape and reel packaging format. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the datasheet specifications against your system's thermal and electrical constraints before finalizing procurement.

Selection Notes

Select this component when a fixed 4.096V reference with ±0.5% accuracy is required. Consider the 100ppm/°C temperature coefficient for thermal stability needs. The low operating current makes it suitable for battery-operated devices. Verify that the SOT-23-3 package fits the PCB layout constraints and that the shunt configuration aligns with the circuit topology.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references. The series offers various fixed voltage options and accuracy grades. The LM4040C41IDBZR specifically denotes the 4.096V variant with C-grade accuracy. It is widely used in industrial and consumer electronics where space and power efficiency are critical design factors.

Replacement Considerations

LM4040C41IDBZT serves as an alternative packaging option with identical electrical characteristics.