LM4040D20QDBZT

Overview

The LM4040D20QDBZT is a precision shunt voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 2.048V with an initial accuracy tolerance of ±1%. The device operates within a temperature range of -40°C to +125°C and features a temperature coefficient of 150ppm/°C. It supports a maximum cathode current of 80 µA and can handle up to 15 mA output current. The component is housed in a SOT-23-3 surface-mount package.

Feature Summary

• Provides stable precision voltage reference via shunt regulation architecture
• Ensures consistent performance across extended industrial temperature ranges
• Delivers specified accuracy without requiring external trimming components

Applications

• Analog-to-digital converter reference inputs
• Data acquisition system calibration
• Portable instrumentation power supplies

Procurement Notes

Verify the specific suffix codes against official datasheets to confirm exact electrical tolerances and temperature grades. Ensure the ordering part number matches the required accuracy and package type for your design specifications before finalizing procurement.

Selection Notes

Select this component when a low-cost, high-accuracy reference is needed for space-constrained designs. The SOT-23-3 package suits compact PCB layouts. Verify that the circuit design accommodates the minimum operating current requirements specified in the technical documentation.

Part Context

This part belongs to the LM4040 series of micropower shunt voltage references from Texas Instruments. The series offers various fixed voltage options and accuracy grades. The 'D' indicates a 1% tolerance grade, while '20' denotes the 2.048V output voltage level.

Replacement Considerations

Check for direct pin-compatible alternatives within the same family, such as different tolerance variants like LM4040B or LM4040C, ensuring voltage and package compatibility.