LM4040B10IDBZTG4

Overview

The LM4040B10IDBZTG4 is a precision micropower shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.25 V with an initial accuracy of 0.1%. The device operates within a temperature range of -40°C to +85°C and features a temperature coefficient of 100 ppm/°C. It supports a maximum shunt current of 15 mA and draws a typical cathode current of 82 µA. The component is housed in a surface-mount SOT-23-3 package.

Feature Summary

• Provides high-precision voltage regulation with 0.1% initial accuracy for sensitive measurement circuits.
• Operates as a two-terminal shunt reference requiring minimal external components.
• Designed for low-power applications with micropower consumption characteristics.

Applications

• Portable battery-powered instrumentation
• Data acquisition systems
• Handheld meters

Procurement Notes

Verify the specific suffix IDBZT against the manufacturer's official documentation to confirm the tape-and-reel packaging configuration. Ensure the B-grade accuracy class matches the design requirements, as other grades offer different tolerance levels. Confirm RoHS compliance status through the latest datasheet revision before procurement.

Selection Notes

Select this component when a stable 1.25 V reference is required in space-constrained designs utilizing the SOT-23-3 footprint. The 100 ppm/°C temperature coefficient makes it suitable for environments with moderate thermal variations. Compare against series references if higher input voltage headroom or lower noise is necessary for the specific application.

Part Context

This part belongs to the LM4040 family of precision micropower shunt voltage references from Texas Instruments. The family offers various fixed output voltages and accuracy grades to support diverse analog circuit needs. The LM4040 series is widely used in industrial and consumer electronics where reliable voltage referencing is critical.

Replacement Considerations

Check for direct pin-compatible alternatives within the same package family. Verify that substitute parts match the 1.25 V output and 0.1% accuracy specifications. Ensure thermal performance and operating temperature ranges are compatible with the existing system design.